N11165
Registered owner: UNITED AIRLINES INC, IL (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
No operator established for this aircraft.
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
Service Difficulty Reports filed with the FAA for this airframe. Filing is largely voluntary — the number of reports is not a measure of reliability. To verify a report, search its control number at the FAA SDRS site.
117 reports on file, 2004-09-05 – 2026-06-07.
Part: ESCAPE HATCH — MISINSTALLED (ZONE 800) · airframe 44,658 hrs · 31,569 cycles
LEFT EMERGENCY HATCH HANDLE UPSIDE DOWN. REINSTALLED LH EMERGENCY HATCH HANDLE CORRECTLY. NO FURTHER DEFECTS NOTED,
Part: SWITCH — INOPERATIVE (ZONE 200) · airframe 44,070 hrs · 30,983 cycles
PFD, MFD 2 WENT BLANK. FMS 1 WENT BLANK. AVIONICS 1 WENT OFFLINE (LIGHT ON). TURNED AVIONICS 1 BACK ON. FMS 1 SINGLE MODE TRIED TO GET FMS 1 BACK ON LINE AND IT DISPLAYED WHAT APPEARED TO BE A TEST PATTERN (COLORS ALPHABET) CA WENT TO REV MODE PFD BUT DATA DISPLAYED WAS STALE (FALSE) COUPED TO FO SIDE SG2 LANDED SAFELY FO SIDE. REMOVED AND REPLACED AVIONICS MASTER SWITCH 1. IPDATED THE FMS NAV DATABASE.
Earlier reports · 2004–2025 · 115 reports
2025
Part: ACM — FAILED (NR 2) · airframe 43,835 hrs · 30,754 cycles
PACK 2 OVERHEAT IN FLIGHT. BURNING SMELL COMING FROM VENT. DURING TROUBLESHOOTING PACK SYSTME FOR BURN SMELL AND OVERHEAT FOUND PACK #1 ACM LOCKED UP. FOUND LOOSE CLAMP ABOVE GRATE #2 PACK EXHAUST GRATE AND UPPER OUTLET DUCT INSULATION NEED TO BE SECURE. REMOVED AND REPLACED PACK #1 ACM. REMOVED AND REPLACED #2 EXHAUST HEAR EXCHANGER DUCT. OPS AND LEAK CHECK SAT FOR #1 PACK AND #2 PACK. NO SMOKE SMELL NOTED IN THE COCKPIT, NO OIL SMELL AND NO BURNT SMELL NOTED.
Part: OIL SYSTEM — LEAKING (APU) · airframe 43,717 hrs · 30,634 cycles
SMOKE ODOR IN COCKPIT & CABIN DURING CRUISE AT FLT LEVEL 220. OPS BOTH PACKS WITH NO FAULTS. FOUND BOTH MUFFLERS TO HAVE TEARS & EVIDENCE OF BURNS. R & R BOTH RECIRC MUFFLERS. PERFORMED OPS CHECK OF PACK SYS. FAULT PERSISTS, RAN PACK 1 & 2 ON BOTH APU & ENGS INDIVIDUALLY. ODOR IS PRESENT WITH ONLY APU BLEED SELECTED. PERFORMED GVI OF PACK SYS 1 & 2. NO DEFECTS NOTED. REMOVED AND REINSTALLED CROSS BLEED VALVE FOR GVI. NO DEFECTS NOTED. FOUND APU LEAKING & CONSUMING OIL. PERFORMED OIL DECONTAMINATION. FOUND WHEN RUNNING PACKS 1 & 2 WITH ENG BLEED NO ODOR NOTED WHEN PACKS ARE OPERATED WITH APU BLEED SMELL PERSISTS. REMOVED AND REPLACED APU. OPS AND LEAK CHECK SAT. C/B E6 AND C30 RESET. OPS AND LEAK CHECK SAT.
Part: INVERTER — INOPERATIVE (ZONE 200) · airframe 43,641 hrs · 30,557 cycles
AFT GALLEY BULKHEAD EMERGENCY EXIT ILLUMINATED PLACARD INOPERATIVE. REMOVED AND REPLACED EXIT SIGN. OPS CHECK FAILED. REMOVED AND REPLACED INVERTER #3. OPS CHECK GOOD.
Part: SIGN — INOPERATIVE (ZONE 200) · airframe 43,641 hrs · 30,557 cycles
FWD GALLEY EXIT MARKING SIGN INOPERATIVE. PERFORMED OPS CHECK. OPS CHECK SAT.
Part: LAMP — INOPERATIVE (ZONE 200) · airframe 43,285 hrs · 30,208 cycles
FOUND LH EMERGENCY LIGHT ABOVE WING INOPERATIVE. REPLACED EMERGENCY LIGHT. OPS CHECK SAT.
2024
Part: LAMP — INOPERATIVE (EXTERIOR) · airframe 41,810 hrs · 28,834 cycles
RH EXTERNAL AFT EMERGENCY LIGHT OUT. REMOVED AND REPLACED EXTERNAL EMERGENCY LIGHT BULB. OPS CHECK SAT.
Part: DOOR SILL — CORRODED (SERVICE DOOR) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF1, CORROSION FOUND ON RH SERVICE DOOR AFT SILL FRAME BTW FR 22-23. IN CF1, RH SILL AFT SERVICE DOOR BTW FR 22-23 BLENDED AND FOUND OUT OF LIMIT. RH STILL AFT SERVICE DOOR REPLACED
Part: CROSSBEAM — CRACKED (FRM 20) · airframe 40,841 hrs · 27,976 cycles
CF1, RH SERVICE DOOR OUTBD CROSSBEAM AT FR20 FOUND CRACKED. RH SERVICE DOOR OUTBD CROSSBEAM AT FR20 REPLACED BY NEW CROSSBEAM
Part: ANGLE — CORRODED (FRMS 23-24) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF1, CORROSION FOUND ON AFT RH STEP ANGLE AT FR 23-24 BTW MIDDLE OMEGA BEAM AND OUTBD FLOOR STRUCTURE. CF1, AFT RH STEP ANGLE AT FR 23-24 BTW MID OMEGA BEAM AND OUTBD FLOOR STRUCTURE CORROSION BLENDED AND FOUND OUT OF LIMITS. CF1, RH STEP ANGLE BTW MIDDLE OMEGA BEAM AND OUTBD AT FR 23-24 REPLACED WITH NEW ONE
Part: FRAME — CRACKED (FRM 59 S15-16L) · airframe 40,841 hrs · 27,976 cycles
CF4, CRACK FOUND ON LH FRAME 59 AT FLOOR STRUCTURE BTW STR 15L-16L. EXTENDED SPLICE REPAIR ON LH CENTER FUSE 4, ON FRAME 59 BTW STR 15L-16L
Part: ANGLE — CRACKED (FRM 75-77 S1-3L) · airframe 40,841 hrs · 27,976 cycles
AT RF1 EXT, LH TOP L-SHAPE ANGLE BTW FR 75-77 AND BTW STR 1L-3L FOUND CRACKED. AT RF1, EXT LH TOP L-SHAPE ANGLE BTW FR 75-77 AND BTW STR 1L-3L REMOVED FOR REPLACEMENT. RF1, EXT LH TOP L-SHAPE ANGLE BTW FR 75-77 AND BTW STR 1L-3L REPLACED
Part: FLOOR SUPPORT — CRACKED (FRM 23-30) · airframe 40,841 hrs · 27,976 cycles
CF2, CRACKS (5X) FOUND ON LH OMEGA BEAM #2 FLOOR STRUCTURE BTW FR 23-30. CF2, LH OMEGA BEAM #2 FLOOR STRUCTURE BTW 23-30 REMOVED FOR REPLACEMENT. CF2, LH OMEGA BEAM #2 BTW 23-30 REPLACED
Part: SEAT TRACK — CORRODED (FRMS 41-48 S13R) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CORROSION FOUND ON RH SIDE SEAT TRACKS SUPPORT BEAM BTW FR 41-48 AT STR 13R. RH SEAT TRACK SUPPORT BEAM BTW FR 41-48 AT STR 13R CORRODED OUT OF LIMIT. SUPPORT BEAM REMOVED FOR REPLACEMENT. CORRODED RH SIDE SEAT TRACKS SUPPORT BEAM BTW FR 41-48 AT STR 13R AREA REPLACED AND INSTALLED WITH NEW PART, SOLID RIVETS AND BLIND RIVETS
Part: SUPPORT FRAME — CRACKED (FRMS 18-20) · airframe 40,841 hrs · 27,976 cycles
CF1, CRACK FOUND ON MIDDLE STEP FRAME FLOOR STRUCTURE BTW FR 18-20. CF1, MIDDLE STEP FRAME STRUCTURE BTW FR 18-20 REMOVED AND REPLACED BY NEW ONE
Part: FLOOR SUPPORT — CORRODED (FRMS 18-22) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF1, CORROSION FOUND ON MIDDLE GUSSET FLOOR STRUCTURE BTW FR18-22. CF1, MIDDLE GUSSET FLOOR STRUCTURE BTW FR18-22 BLENDED OUT OF LIMITS. MIDDLE GUSSET REMOVED FOR REPLACEMENT. CF1, NEW MIDDLE GUSSET FLOOR BTW FR 18-22 INSTALLED
Part: BULKHEAD — CRACKED (AFT) · airframe 40,841 hrs · 27,976 cycles
AT RH WHEEL WELL, AFT BULKHEAD IS CRACKED. CRACKED RH W/W AFT FAIRING BULKHEAD REMOVED. CRACKED RH W/W AFT BULKHEAD REPLACED AND INSTALLED WITH NEW PART AND SOLID RIVETS. DURING REPLACEMENT OF CRACKED BULKHEAD, LOWER REAR ANGLE FOUND CORRODED OUT OF LIMITS. LOWER REAR ANGLE REMOVED AND REPLACED WITH NEW PART AND SOLID RIVETS. DURING REPLACEMENT AFT BULKHEAD AT RH WHEEL WELL, OUTBD RIB FOUND CRACKED AND REPLACED.
Part: BULKHEAD — CRACKED (LT MLG WW) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
AT LH WHEEL WELL, AFT BULKHEAD IS CRACKED. CRACKED LH W/W BULKHEAD REMOVED FOR REPLACEMENT. CRACKED LH W/W AFT BULKHEAD REPLACED. INSTALLED NEW PART AND SOLID RIVETS. DURING REPLACEMENT OF CRACKED BULKHEAD, LOWER REAR ANGLE FOUND CORRODED OF LIMITS. LOWER REAR ANGLE REMOVED AND REPLACED WITH NEW PART AND SOLID RIVETS.
Part: CROSSBEAM — CRACKED (NLG WW) · airframe 40,841 hrs · 27,976 cycles
NLG W/WELL, CRACK FOUND ON NLG FWD TOP CROSSBEAM. NLG W/WELL, NLG FWD TOP CROSSBEAM REMOVED FOR REPLACEMENT. NLG W/WELL, NLG FWD NEW TOP CROSSBEAM INSTALLED
Part: NUT PLATE — CRACKED (WINDOW FRAME) · airframe 40,841 hrs · 27,976 cycles
CRACKS FOUND ON TOP OVERHEAD MIDDLE FRAME AROUND NUTPLATE ON WINDSHIELD SURROUND STRUCTURE COCKPIT AREA. TOP OVERHEAD MIDDLE FR AROUND NUTPLATE ON WINDSHIELD SURROUND STRUCTURE REPAIRED
Part: FLOORBEAM — CORRODED (FRM 22) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF1, LH OUTBD CROSSBEAM AT FR22 ON FLOOR STRUCTURE FOUND CORRODED. LH OUTBD CROSSBEAM AT FR22 BLENDED OUT OF LIMITS. REMOVED FOR REPLACEMENT. NEW CROSSBEAM AT FR22 INSTALLED
Part: GUSSET — CORRODED (FRMS 18-24) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF1, LH GUSSET #1 BTW FR 18-24 FOUND CORRODED. LH GUSSET #1 BLENDED OUT OF LIMITS. REMOVED AND REPLACED.
Part: FLOOR SUPPORT — CRACKED (CABIN) · airframe 40,841 hrs · 27,976 cycles
CF1 (4X) ANGLES FOUND CRACKED U/FLOOR ON L AND MIDDLE OMEGA BEAM AT FWD AND AFT DIGITAL PLATE JUNCTION. AFTER INVESTIGATION LH INBD ANGLE ON LH OMEGA BEAM #1, ANGLE NOT FOUND CRACKED. REMOVED AND REPLACED 2 ANGLES. 1X ON LH OMEGA BEAM #1 OUTBD. 2X ON MIDDLE #1 OMEGA BEAM AT FWD-AFT DIGITAL PLATE
Part: FLOOR SUPPORT — CRACKED (FRMS 18-24) · airframe 40,841 hrs · 27,976 cycles
CF1, CRACKS (3X) FOUND ON LH OMEGA BEAM #1 FLOOR STRUCTURE BTW FR 18-24. REMOVED AND REPLACED OMEGA BEAM CH #1
Part: SHELF — CRACKED (NLG WW) · airframe 40,841 hrs · 27,976 cycles
NLG W/WELL CRACKS FOUND ON NLG TOP SHELF ASSEMBLY. NLG W/WELL, NLG TOP SHELF ASSY, TOP (2) CUT-OUT DONE. HFEC INSPECTION CARRY OUT ON TWO CUT-OUT, NO CRACK INDICATION FOUND. NLG TOP SHELF ASSEMBLY SHIM DOUBLERS AND FILLER LOCALLY FABRICATED AND ISNTALLED.
Part: FLOOR SUPPORT — CORRODED (FRMS 17-18) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF1, CORROSION FOUND AT MANY PLACES ON AFT DIGITAL FLOOR STRUCTURE BTW FR 17-18. AFT DIGITAL FLOOR STRUCTURE BTW FR 17-18 BLENDED OUT OF LIMITS. REMOVED AND REPLACED AFTDIGITAL FLOOR STRUCTURE BTW FR 17-18
Part: BRACKET — CRACKED (LT PRECOOLER) · airframe 40,841 hrs · 27,976 cycles
ON LH PRECOOLER REMOVAL, LH PRECOOLER FWD STRUCTURE BRACKET FOUND CRACKED AND BENT. LH FWD PRECOOLER STRUCTURE BRACKET REMOVED AND REPLACED
Part: COWLING — CRACKED (LEFT) · airframe 40,841 hrs · 27,976 cycles
LH LOWER COWL, AFT LIP CRACKED. LH ENG LOWER COWL LIP REPLACED
Part: DOUBLER — CORRODED (FRM 65) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
RF1, RH FR 65 REINFORCEMENT FRAME DOUBLER AT FLOOR LEVEL BTW STR 15R-16R FOUND CORRODED. ON RF1, RH FR65 REINFORCEMENT FRAME DOUBLER AT FLOOR LEVEL BTW STR 15R-16R REPLACED
Part: FLOOR SUPPORT — CRACKED (FRM 25) · airframe 40,841 hrs · 27,976 cycles
CF2, CRACK FOUND ON CENTER OMEGA BEAM #1 INBD FLANGE AT FR25 ON FLOOR STRUCTURE AREA. REPAIR DOUBLER FABRICATED FOR OMEGA BEAM #1 INBD FLANGE AT FR25. CENTER OMEGA BEAM #1 FLANGE AT FR25 REPAIRED.
Part: DOUBLER — CORRODED (FRMS 20-22) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF1, CORROSION FOUND ON RH DOUBLERS FLOOR STRUCTURE AT FR20 AND FR22. RH DOUBLER REMOVED AND REPLACED
Part: FLOOR SUPPORT — CRACKED (FRM 27) · airframe 40,841 hrs · 27,976 cycles
CF2, CRACK FOUND ON CENTER OMEGA BEAM #1 INBD. FLANGE AT FR27 ON FLOOR STRUCTURE. REPAIR DOUBLER FABRICATED FOR OMEGA BEAM #1 INBD FLANGE AT FR27. CENTER OMEGA BEAM #1 INBD FLANGE AT FR27 REPAIRED.
Part: GUSSET — CORRODED (FRMS 59-61) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF4, RH GUSSET IN TOILET AREA BTW FR 59-61 FOUND CORRODED. IN CF4, RH GUSSET BLENDED AND FOUND OUT OF LIMIT. IN CF4, RH GUSSET BTW FR 59-61 REPLACED WITH NEW ONE
Part: FLOOR SUPPORT — CRACKED (FRMS 29-36) · airframe 40,841 hrs · 27,976 cycles
CF2, CRACKS (5X) FOUND ON LH OMEGA BEAM #3 FLOOR STRUCTURE BTW 29-36. CF2 ON LH OMEGA BEAM #3 FLOOR STRUCTURE BTW FR 29-36, REMOVED FOR REPLACEMENT. CF2 ON LH OMEGA BEAM #3 FLOOR STRUCTURE BTW FR 29-36, ALL PARTS DRILLED AND READY TO INSTALL. CF2, LH OMEGA BEAM #3 BTW FR 29-36 REPLACEMENT DONE
Part: CROSSBEAM — CRACKED (NLG WW) · airframe 40,841 hrs · 27,976 cycles
NLG W/WELL, CRACK FOUND ON NLG AFT TOP CROSSBEAM. NLG W/WELL, NLG AFT TOP CROSSBEAM REMOVED FOR REPLACEMENT. NLG W/WELL, NEW CROSSBEAM DRILLED AND INSTALLED
Part: CUP — CORRODED (FRMS 60-61) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF4, CORROSION FOUND ON TOILET WASTE CUP U/FLOOR BTW FR 60-61 AND BTW STR 18R-20R. REPLACED PROFILE Z TOILET + WASTE CUP
Part: FLOOR SUPPORT — CORRODED (FMS 59-61) · airframe 40,841 hrs · 27,976 cycles
AFTER REMOVAL OF CTR GUSSET BTW FR 59-61, OMEGA BEAM FOUND CORRODED AT FR 59 (AROUND ANCHOR NUT). BEAM REPAIRED WITH A DOUBLER. CORROSION LEVEL 1.
Part: INTERCOSTAL — CRACKED (FWD CARGO) · airframe 40,841 hrs · 27,976 cycles
RF1, RH FWD I/COSTAL CARGO DOOR MECH BTW STR 4R-5R AT FR 62 FOUND CRACKED. RF1, RH FWD I/COSTAL CARGO DOOR MECH BTW STR 4R-5R AT FR 62 REMOVED AND REPLACED
Part: SHEAR TIE — CRACKED (FRM 62 S6-8R) · airframe 40,841 hrs · 27,976 cycles
AT RF1, FRAME 62, RH SIDE SHEAR CLIP BTW STR 6R-8R FOUND CRACKED. AT RF1, FR62 RH SIDE SHEAR CLIP REPLACED BTW STR 6R
Part: INTERCOSTAL — CRACKED (FRM 67-68 S4) · airframe 40,841 hrs · 27,976 cycles
RF1, UPPER I/COSTAL OF CARGO DOOR MECHANISM AT STR 4 BTW FR 67-68 FOUND CRACKED. UPPER I/COSTAL REMOVED AND REPLACED
Part: INTERCOSTAL — CRACKED (CARGO DOOR) · airframe 40,841 hrs · 27,976 cycles
RF1, LOWER 1/COSTAL OF CARGO DOOR MECHANISM, AT STR 5 BTW FR 67-68 FOUND CRACKED. LOWER 1/COSTAL REMOVED AND REPLACED
Part: SKIN — CRACKED (FRMS 77-80 S3-9R) · airframe 40,841 hrs · 27,976 cycles
CRACKS SUSPECTED (17X) ON RH SKIN AROUND FASTENERS BTW FR77-80 BTW STR 3R-9R. AFTER NDT INSPECTION, 13X CRACK CONFIRMED. ALL 13X CRACKS REPAIRED
Part: DOUBLER — CORRODED (FUSELAGE) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
TRACE OF CORROSION FOUND ON INNER DOUBLER AT ELT ANTENNA LOCATION. INNER DOUBLER REMOVED AND REFABRICATED AND INSTALLED
Part: INTERCOSTAL — CRACKED (CARGO DOOR) · airframe 40,841 hrs · 27,976 cycles
RF1, VERTICAL I/COSTAL OF CARGO DOOR MECHANISM BTW STR 4-5 BTW FR67-68 FOUND CRACKED. I/COSTAL REMOVED AND REPLACED
Part: SUPPORT BRACKET — BROKEN (LT A/C PACK VLV) · airframe 40,841 hrs · 27,976 cycles
LH PACK VALVE ANTI-ROTATION SUPPORT BRACKET IS BROKEN ON FUSE. LH PACK VALVE ANTI-ROTATION SUPPORT BRACKET REMOVED AND REPLACED.
Part: SHEAR TIE — CRACKED (FRM 16 S15-16R) · airframe 40,841 hrs · 27,976 cycles
CF1, FRAME 16, RH SHEAR CLIP FOUND CRACKED BTW STR 15R-16R. FR16, RH SHEAR CLIP BTW STR 15-16 REMOVED AND REPLACED
Part: BRACKET — CRACKED (FRM 68) · airframe 40,841 hrs · 27,976 cycles
RF1, LH FR68 REINFORCEMENT BRACKET CARGO DOOR HOLDER FOUND CRACKED. BRACKET REMOVED AND REPLACED
Part: FLOOR SUPPORT — CORRODED (FRMS 23-30) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
AR CFII, CORROSION FOUND ON LH SILL #2 BTW FR23 AND FR30 IN FLOOR STRUCTURE AREA. LH SILL #2 REPLACED
Part: SHEAR TIE — CRACKED (FRM 73 S16-17L) · airframe 40,841 hrs · 27,976 cycles
AT RF1, FRAME 73, LH SHEAR CLIP U/FLOOR BTW STR 16L-17L FOUND CRACKED. AT RF1, FR73, LH SHEAR CLIP REPLACED BTW STR 16L-17L
Part: FLOOR SUPPORT — CORRODED (FRMS 52-59) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
AT CF IV, CORROSION FOUND ON RH SILL #6 BTW FR 52-59 IN FLOOR STRUCTURE AREA. RH SILL #6 REPLACED
Part: SKIN — CRACKED (FRM 77-80 S3-9L) · airframe 40,841 hrs · 27,976 cycles
CRACKS SUSPECTED (13X) ON LH SKIN AROUND FASTENERS BTW FR 77-80 BTW STR 3L-9L. AFTER NDT INSPECTION, 11X CRACKS ONLY CONFIRMED. ALL 11X CRACKS REPAIRED.
Part: FLOOR SUPPORT — CORRODED (FRM 23) · airframe 40,841 hrs · 27,976 cycles
CF1, CORROSION FOUND ON RH OMEGA BEAM AT FR23 ON FLOOR STRUCTURE AREA. CORROSION LEVEL 1. REPAIRED.
Part: SHEAR TIE — CRACKED (FRM 72 S17-18L) · airframe 40,841 hrs · 27,976 cycles
AT RF1, FRAME 72, LH SHEAR CLIP U/FLOOR BTW STR 17L-18L FOUND CRACKED. ON RF1, FR 72, LH SHEAR CLIP U/FLOOR BTW STR 17L-18L REPLACED BY NEW ONE
Part: SHEAR TIE — CRACKED (FRM 67) · airframe 40,841 hrs · 27,976 cycles
AT RF1, FRAME 67, LH SIDE SHEAR CLIP BTW STR 6L-7L FOUND CRACKED. SHEAR CLIP REMOVED AND REPLACED
Part: SHEAR TIE — CRACKED (FRM 71) · airframe 40,841 hrs · 27,976 cycles
AT RF1, FRAME 71, LH U/FLOOR SHEAR CLIP BTW STR 17L-18L FOUND CRACKED. AT RF1, FR71, LH U/FLOOR SHEAR CLIP REPLACED BTW STR 17L-18L
Part: SHEAR TIE — CRACKED (FRM 16 S16-17R) · airframe 40,841 hrs · 27,976 cycles
CF1, FRAME 16, RH SHEAR CLIP FOUND CRACKED BTW STR 16R-17R. FR16, RH SHEAR CLIP BTW STR 16-17 REMOVED AND REPLACED
Part: GUSSET — CORRODED (FRMS 59-61) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF4, MIDDLE GUSSET IN TOILET AREA BTW FR 59-61 FOUND CORRODED. CTR GUSSET REMOVED AND REPLACED
Part: SHEAR TIE — CRACKED (FRM 25 S15-16L) · airframe 40,841 hrs · 27,976 cycles
CF2, FRAME 25, LH SHEAR CLIP FOUND CRACKED BTW STR 15L-16L. REMOVED AND REPLACED LH FR 25 SHEAR CLIP
Part: FLOOR SUPPORT — CORRODED (FRMS 41-48) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
AT CFIII, CORROSION FOUND ON RH SILL #4 BTW FR 41 AND FR 48 IN FLOOR STRUCTURE AREA. RH SILL #4 REPLACED
Part: CROSSBEAM — CORRODED (FRM 61) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
RF1, RH FR61 INBD CROSSBEAM AT FLOOR LEVEL STRUCTURE FOUND CORRODED. CROSS BEAM REMOVED AND REPLACED
Part: FLOOR SUPPORT — CORRODED (FRMS 35-42) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
AT CFIII, CORROSION FOUND ON LH SILL #4 BTW FR 35 AND FR 42 IN FLOOR STRUCTURE AREA. LH SILL #4 REPLACED.
Part: GUSSET — CORRODED (FRMS 59-61) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CF4, LH GUSSET IN TOILET AREA BTW FR 59-61 FOUND CORRODED. LH GUSSET REMOVED AND REPLACED
Part: FLOOR SUPPORT — CRACKED (FRM 33) · airframe 40,841 hrs · 27,976 cycles
CF2, CRACK FOUND ON CENTER OMEGA BEAM #2 INBD. FLANGE AT FR33 ON FLOOR STRUCTURE AREA. CENTER OMEGA BEAM #2 AT FR33 REPAIRED
Part: SHEAR TIE — CRACKED (FRM 68 S6-9L) · airframe 40,841 hrs · 27,976 cycles
ART RF1, FRAME 68, LH SIDE SHEAR CLIP BTW STR 6L-9L FOUND CRACKED. SHEAR CLIP FR65 REMOVED AND REPLACED.
Part: SUPPORT — CORRODED (FRMS 35-42) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
AT CFIII, CORROSION FOUND ON RH SILL #3 BTW FR 35 AND FR 42 IN FLOOR STRUCTURE AREA. RH SILL #3 REPLACED
Part: SHEAR TIE — CRACKED (FRM 58 S15-16L) · airframe 40,841 hrs · 27,976 cycles
CF4, FRAME 58, L SHEAR CLIP FOUND CRACKED BTW STR 15L-16L. CRACKED CF4 FRAME 58 LH SHEAR CLIP BTW STR 15L-16L REMOVED AND REPLACED WITH NEW PART AND SOLID RIVETS.
Part: DOOR FRAME — CORRODED (FRM 65) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
CARGO DOOR SURROUND STRUCTURE FWD L-SHAPE AT FR65 FOUND CORRODED. FWD L-SHAPE REPAIRED
Part: SUPPORT — CORRODED (FRM 47-53) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
AT CFIII, CORROSION FOUND ON LH SILL #6 BTW FR 47 AND FR 53 IN FLOOR STRUCTURE AREA. LH SILL #6 REPLACED
Part: DOOR FRAME — CORRODED (FRM 68) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
RF1, CARGO DOOR SURROUND STRUCTURE AFT L-SHAPE AT FR 68 FOUND CORRODED. AFT L-SHAPE REPAIRED.
Part: FLOOR SUPPORT — CORRODED (FRMS 29-36) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
AT CFII, CORROSION FOUND ON LH SILL #3 BTW FR 29 AND FR 36 IN FLOOR STRUCTURE AREA. LH SILL #3 REMOVED AND REPLACED
Part: SHEAR TIE — CRACKED (FRM 27 S15-16R) · airframe 40,841 hrs · 27,976 cycles
CF2, FRAME 27, RH SHEAR CLIP FOUND CRACKED BTW STR 15R-16R. CRACKED CF2 FRAME 27, RH SHEAR CLIP REMOVED FOR REPLACEMENT. CRACKED CF2, FRAME 27 RH SHEAR CLIP BTW STR 15-16R REPLACED AND INSTALLED WITH NEW PART AND SOLID RIVETS
Part: SHEAR TIE — CRACKED (FRM 24 S15-16R) · airframe 40,841 hrs · 27,976 cycles
CF2, FRAME 24, RH SHEAR CLIP FOUND CRACKED BTW STR 15R-16R. CRACKED CF2 FRAME 24 RH SHEAR CLIP REMOVED FOR REPLACEMENT. CRACKED CF2 FRAME 24 RH SHEAR CLIP BTW STR 15-16R REPLACED AND INSTALLED WITH NEW PART AND SOLID RIVETS.
Part: SHEAR TIE — CRACKED (FRM 24 S16R) · airframe 40,841 hrs · 27,976 cycles
CF2, FRAME 24, RH SHEAR CLIP FOUND CRACKED BTW STR 16R-16R. CRACKED CF2 FRAME 24 RH SHEAR CLIP BTW STR 16-17R REMOVED FOR REPLACEMENT. CRACKED CF2 FRAME 24 RH SHEAR CLIP BTW STR 16-17R REPLACED AND INSTALLED WITH NEW PART AND SOLID RIVETS.
Part: DOUBLER — CORRODED (FRM 61) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
RF1, RH FR61 SIDE REINFORCEMENT DOUBLER AT FR61 BTW STR 7R-16R FOUND CORRODED. IN RF1, AT FR61, SIDE REINFORCEMENT DOUBLER BTW STR 7R-16R BLENDED OUT OF LIMIT. RF1, RH SIDE REINFORCEMENT DOUBLER AT FR61 BTW STR 7R-16R REMOVED FOR REPLACEMENT. INS RF1, RH FR61 SIDE REINFORCEMENT DOUBLER BTW STR 7R-16R REPLACED
Part: FRAME — CORRODED (FRM 61 S7-16L) · corrosion level 2 · airframe 40,841 hrs · 27,976 cycles
RF1, LH FR61 SIDE REINFORCEMENT DOUBLER AT FR61 BTW STR 7L-16L FOUND CORRODED. IN RF1, AT FR61, LH SIDE REINFORCEMENT DOUBLER BTW STR 7L-16L BLENDED AND FOUND OUT OF LIMITS. RF1, LH SIDE REINFORCEMENT DOUBLER FR61 BTW STR 7L-16L REMOVED FOR REPLACEMENT. RF1, LH SIDE REINFORCEMENT DOUBLER FR61 BTW STR 7L-16L REPLACED
Part: FAIRING — CRACKED (WNG TO BDY) · airframe 40,841 hrs · 27,976 cycles
RH WING, AT TOP WING TO BODY FAIRING, ANGLE AFT SPAR II CRACKED. ANGLE REPLACED
2023
Part: UNKNOWN — UNKNOWN (UNKNOWN) · airframe 40,429 hrs · 27,580 cycles
EMERGENCY EXIT CAPT SIDE OVER WING OPEN MESSAGE. RE SEATED EMERGENCY EXIT DOOR.
Part: SKIN — DAMAGED (RT WING LE) · airframe 39,976 hrs · 27,174 cycles
2 INCH HOLE ON RH WING LEADING EDGE 2 FT FROM THE WINGLET. REMOVED AND REPLACED RH #3 LEADING EDGE. OPS AND LEAK CHECK SAT
Part: UNKNOWN — UNKNOWN · airframe 39,522 hrs · 26,775 cycles
EXTERNAL SERVICE DOOR EMERGENCY LIGHT INOPERATIVE. INSTALLED BULB CORRECTLY. OPS CHECK SAT
2022
Part: SWITCH — FAULTED (CROSSFEED) · airframe 39,342 hrs · 26,609 cycles
SMOKE AND BURNING SMELL IN COCKPIT. FLAMES VISIBLE BETWEEN #1 FIRE HANDLE AND FUEL PANEL. FLAMES EXTINGUISHED BY THEMSELVES. SMOKE AND ODOR STILL PRESENT. INSPECTED AND FOUND "CROSS FEED" BREAKER POPPED. REMOVED OVHD PANEL AND FOUND CROSS FEED SWITCH BURNT. INSPECTED SURROUNDING AREAS WITH NO FURTHER DEFECTS NOTED. REMOVED AND REPLACED FUEL PANEL, RESET C/B AND OPS CHECK GOOD. NO HEATING OR SMOKE NOTED.
Part: BATTERY — INOPERATIVE · airframe 39,179 hrs · 26,468 cycles
R/H FWD EXTERNAL WING TO FUSELAGE EMERGENCY LIGHT INOP. R/R BPS#2. OPS CHECK SAT
Part: NONE — NONE · airframe 38,417 hrs · 25,778 cycles
EMERGENCY EXIT SIGN LOOSE 18A. RESECURED 18A EMERGENCY SIGN.
Part: NONE — NONE · airframe 38,008 hrs · 25,405 cycles
FLOOR EMERGENCY EXIT SIGN AT SEAT 18A DETACHED FROM FLOOR. RESECURED FLOOR EMERGENCY EXIT SIGN. NO FURTHER DEFECTS NOTED AT THIS TIME
2021
Part: NONE — NONE · airframe 37,596 hrs · 25,038 cycles
RUDER II PANEL 327FR LH UPPER LANDING CRACKED. REMOVE AND REPLACED RUDDER II PANEL 327FR LH UPPER LANDING
Part: NONE — NONE · airframe 37,596 hrs · 25,038 cycles
RT #2 ENG TR OBD/UPPER CORNER, INTERNALLY DAMAGED TR. TAP TESTED AREA AT RH #2 ENG TR OBD/UPPER CORNER, NO DAMAGE NOTED.
Part: NONE — NONE · corrosion level 2 · airframe 37,596 hrs · 25,038 cycles
RH FLOORBOARD SUPPORT CAP HAS SIGNS OF CORROSION AT FRAME 59. INSTALLED NEW GUSSET AT RH FLOORBOARD SUPPORT. CORROSION LEVEL2
Part: NONE — NONE · corrosion level 2 · airframe 37,596 hrs · 25,038 cycles
CENTER FLOORBOARD SUPPORT CAP HAS SIGNS OF CORROSION AT FRAME 59. REMOVED AND REPLACED DAMAGED GUSSET AT CENTER FLOOR BOARD FRAME 59-FRAME 60. CORROSION LEVEL 2
Part: NONE — NONE · corrosion level 2 · airframe 37,596 hrs · 25,038 cycles
AFT SILL LH SIDE AT FRAME 60 HAS SIGNS OF CORROSION. REMOVED AND REPLACED DAMAGED SILL AT LH SIDE FR60 TO 6A ON THE MAIN CABIN.
Part: NONE — NONE · corrosion level 2 · airframe 37,596 hrs · 25,038 cycles
LH FLOORBOARD SUPPORT CAP HAS SIGNS OF CORROSION AT FRAME 59. REPLACED GUSSET AT LH SIDE FLOORBOARD SUPPORT.
Part: SKIN — DENTED (RT FUSELAGE) · airframe 37,036 hrs · 24,529 cycles
CF II RT FUSELAGE DENTED BETWEEN FR 26-27 STR 11-12. CENTER FUSELAGE II DENT BETWEEN FR 26-27, STR 10R-12R REPAIRED.
Part: SKIN — DAMAGED (GPU ACCESS AREA) · airframe 37,036 hrs · 24,529 cycles
LT EXTERNAL FUSE BELOW GPU ACCESS PANEL, TOOL MARK. EXTERNAL FUSELAGE BELOW GPU ACCESS PANEL, TOOL MARK REPAIRED.
Part: SKIN — DENTED (TE RUDDER) · airframe 37,036 hrs · 24,529 cycles
TRAILING RUDDER LT SKIN, MULTIPLE DENTS FOUND BETWEEN SPAR AND TRAILING EDGE & BETWEEN ZV 2648-3229. ACCESS DOOR 327DL REMOVED FOR ACCESS. TRAILING RUDDER LT SKIN, DENT NR 1 REPAIRED.
Part: DOOR — MISREPAIRED (AFT SERVICE DOOR) · airframe 37,036 hrs · 24,529 cycles
RT CTR FUSELAGE I, SUSPICIOUS REPAIR FOUND AFT OF SERVICE DOOR CUT-OUT, BETWEEN FR 22-22A AND BETWEEN STR 10R-12R. RT CENTER FUSELAGE 1, AFT SERVICE DOOR CUT-OUT BETWEEN FR 22-22A AND BETWEEN STR 10R-12R REPAIRED.
Part: SKIN — DENTED (CARGO DOOR) · airframe 37,036 hrs · 24,529 cycles
BAGGAGE DOOR SKIN, DENT FOUND IN THE LOWER AFT AREA, BELOW HB4 AND AFT OF VB5. BAGGAE DOOR SKIN, DENT IN THE LOWER AFT AREA, BETWEEN HB4 AND AFT OF VB5 REPAIRED.
Part: DOUBLER — DAMAGED (PRESS BULKHEAD) · airframe 37,036 hrs · 24,529 cycles
REPAIR DOUBLER FOUND ON FWD PRESSURE BULKHEAD AT XM WIRING HARNESS LOCATION. REPAIR DOUBLER ON FWD PRESSURE BULKHEAD AT XM WIRING HARNESS LOCATION REPAIR REWORKED.
2019
Part: INVERTER — INOPERATIVE (EMERGENCY LIGHTS) · airframe 35,378 hrs · 23,211 cycles
DURING MX INSPECTION THE LEFT OVERWING EMERGENCY DOOR EXIT IDENTIFIER FOUND INOP. MX R&R THE NR 5 INVERTER WITH OPERATIONAL CHECK GOOD. A/C WAS APPROVED FOR RETURN TO SERVICE.
2016
Part: BEAM — CORRODED (FRAMES 65-68) · corrosion level 2 · airframe 29,305 hrs · 18,834 cycles
DURING C-CHECK, THE CARGO DOOR CUTOUT LOWER BEAM WAS FOUND TO BE CORRODED. MAINTENANCE REMOVED AND REPLACED THE BEAM IAW SRM 51-40-02. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.
Part: DOOR SILL — CORRODED (FRAMES 19-20) · corrosion level 2 · airframe 29,305 hrs · 18,834 cycles
DURING C-CHECK, THE SERVICE DOOR FORWARD SILL WAS FOUND TO BE CORRODED. MAINTENENACE REMOVED AND REPLACED THE SILL IAW SRM 51-40-02. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.
2014
Part: REGULATOR VALVE — INOPERATIVE (NR 2 A/C PACK) · airframe 24,182 hrs · 15,321 cycles
CABIN EICAS MESSAGE IN FLIGHT CLIMBING THROUGH 27000 FT, NR 2 PACK VALVE CLOSED MESSAGE AND NR 2 BLEED VALVE CLOSED MESSAGES ALSO PRESENTED AFTER. R & R RT PRESSURE REGULATOR & SHUTOFF VALVE. OPS CHECKED GOOD. ACFT RELEASED AND RETURNED TO SERVICE.
2012
Part: ENGINE — ODOR (NR 2) · airframe 19,113 hrs · 12,096 cycles
THE CREW REPORTED HAZE AND ODOR IN CABIN. MX R & R THE NR 2 ENGINE, OPS TESTED WITH NO DEFECTS NOTED, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.
Part: SMOKE DETECTOR — FALSE ACTIVATION (LAVATORY) · airframe 19,108 hrs · 12,092 cycles
THE CREW REPORTED A LAV SMOKE INDICATION AFTER TAKE OFF. THE ACFT RETURNED TO WHERE IT LANDED WITHOUT INCIDENT. MX INSPECTED THE ACFT, R & R THE LAVATORY SMOKE DETECTOR, OPS TESTED WITH NO DEFECTS, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.
2011
Part: SMOKE DETECTOR — NO TEST (LAVATORY) · airframe 16,177 hrs · 10,120 cycles
FLIGHT 3122 - EWR - FLIGHT CREW REPORTED LAV SMOKE DETECTOR WOULD NOT TEST. EWR MX REMOVED AND REPLACED LAV SMOKE DETECTOR AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.
Part: COMPUTER — DEFECTIVE (AHRS) · airframe 16,177 hrs · 10,120 cycles
FLIGHT 3122 - EWR - FLIGHT CREW REPORTED AHRS NR 2 FAIL IN FLIGHT. CREW PERFORMED AIR RETURN AND LANDED UNEVENTFULLY. EWR MX REMOVED AND REPLACED AHRS COMPUTER NR 2 AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.
Part: SENSOR — INTERMITTENT (LAVATORY) · airframe 15,528 hrs · 9,759 cycles
THE CREW REPORTED A LAV SMOKE WARNING MESSAGE INTERMITTENTLY. MAINTENANCE INSPECTED AND REPLACED THE LAV SMOKE DETECTOR SENSOR. OPERATIONAL CHECKS WERE GOOD.
Part: PANEL — DEFECTIVE (SMOKE DETECTION) · airframe 15,518 hrs · 9,751 cycles
ALB FLT 5876 THE CREW REPORTED A LAV SMOKE MESSAGE ON THE EICAS. MAINTENANCE INSPECTED AND REPLACED THE SMOKE DETECTOR PANEL. OPERATIONAL CHECKS WERE GOOD.
Part: SMOKE DETECTOR — DIRTY (LAVATORY) · airframe 15,506 hrs · 9,742 cycles
FLIGHT 6102 - ABE -FLIGHT CREW REPORTED LAV SMOKE DET INOP / LAV SMOKE INDICATION ON EICAS COULD NOT BE CANCELLED. PLACED IN MEL. IAD MX CLEANED SMOKE DETECTOR SCREEN AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.
Part: WARNING SYSTEM — FALSE ACTIVATION (COCKPIT) · airframe 15,482 hrs · 9,722 cycles
ORD FLT 6103 THE CREW REPORTED A LAV SMOKE MESSAGE. THE SYSTEM WAS RESET AND OPERATIONAL CHECKS WERE GOOD.
Part: SMOKE WARNING — FALSE ACTIVATION (COCKPIT) · airframe 15,418 hrs · 9,663 cycles
CVG - PRIOR TO PUSHBACK ON FLIGHT 5879 THE CREW REPORTED A LAV SMOKE MESSAGE AND ALARM BELL WITH NO SMOKE PRESENT. MAINTENANCE RESET THE SYSTEM, PERFORMED OPS CHECKS OF THE LAV SMOKE DETECTION SYSTEM WITH NO DEFECTS NOTED, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.
Part: SENSOR — FAULTY (NR 1 ENGINE) · airframe 14,720 hrs · 9,102 cycles
IAD FLT 6143 THE CREW REPORTED NR 1 LP VIBRATION ABNORMAL INDICATION AFTER TAKEOFF. THE AIRCRAFT RETURNED AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE NR1 ENGINE FRONT FRAME VIBRATION SENSOR. OPERATIONAL CHECKS WERE GOOD.
Part: ACCELEROMETER — MALFUNCTIONED (VIBRATION SYS) · airframe 14,720 hrs · 9,101 cycles
FLIGHT 6143 - IAD - FLIGHT CREW REPORTED ABNORMAL VIBRATION INDICATION ON ENG NR 1 AFTER TAKEOFF - ALL OTHER INDICATIONS WERE NORMAL. CREW PERFORMED AIR RETURN AND LANDED SAFELY. IAD MX REMOVED AND REPLACED NR 1 ENG ACCELEROMETER AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.
2010
Part: WARNING SYSTEM — FALSE ACTIVATION (COCKPIT) · airframe 13,621 hrs · 8,093 cycles
SUPPLEMENT CORRECTION TO SDR C2XA10CL141. USED INCORRECT NUMBER. IAD FLT 5953 THE CREW REPORTED A LANDING GEAR LEVER DISAGREE WARNING ON THE EICAS AFTER GEAR RETRACTION. CYCLED THE GEAR AND THE MESSAGE RETURNED. THE AIRCRAFT RETURNED AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND PERFORMED GEAR OPERATIONAL CHECKS AND COULD NOT DUPLICATE THE PROBLEM BUT CHANGED THE RT GEAR UPLOCK BOX AND PROXIMITY SWITCHES FOR PRECAUTIONARY REASONS. OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.
Part: CLAMP — FAULTY (NR 1 PRECOOLER) · airframe 12,987 hrs · 7,484 cycles
ORD FLT 5673 THE CREW REPORTED A BLEED 1 LEAK ON THE ECIAS. THE AIRCRAFT DIVERTED INTO CLE AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE AFT CLAMP ON THE NR 1 PRECOOLER. OPERATIONAL CHECKS WERE GOOD.
2009
Part: BATTERY PACK — DISCHARGED (CABIN) · airframe 12,414 hrs · 7,007 cycles
IAH - DURING MAINTENANCE INSPECTION THE EMERGENCY LIGHTS ON THE LEFT AND RIGHT SIDEWALL PANELS WAS FOUND TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE NUMBER THREE EMERGENCY LIGHT BATTERY, OPERATIONALLY TESTED WITH NO DEFECTS. AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.
Part: BATTERY PACK — DISCHARGED (CABIN) · airframe 12,150 hrs · 6,799 cycles
IAH-DURING MX INSPECTION THE RT FORWARD EMERGENCY LIGHT WAS FOUND TO BE INOPERATIVE. MX R&R THE NR 2 EMERGENCY LIGHT BATTERY, OPS TESTED WITH NO DEFECTS NOTED. THE ACFT WAS APPROVED FOR RETURN TO SERVICE.
2004
Part: BATTERY PACK — DISCHARGED (EMERGENCY LIGHT) · airframe 588 hrs · 306 cycles
DURING MAINTENANCE INSPECTION, SEVERAL EMERGENCY LIGHTS WERE FOUND TO BE INOPERATIVE AND THE NUMBER THREE EMERGENCY LIGHT BATTERY PACK WAS WEAK. MAINTENANCE REMOVED AND REPLACED THE NUMBER THREE EMERGENCY LIGHT BATTERY PACK AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.
Part: BATTERY PACK — DISCHARGED (EMERGENCY LIGHT) · airframe 588 hrs · 306 cycles
MCI - DURING MAINTENANCE INSPECTION, SEVERAL EMERGENCY LIGHTS WERE FOUND TO BE INOPERATIVE AND THE NUMBER FOUR EMERGENCY LIGHT BATTERY PACK WAS WEAK. MAINTENANCE REMOVED AND REPLACED THE NUMBER FOUR EMERGENCY LIGHT BATTERY PACK, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.