N301DL

Part: SKIN — CRACKED (BS 765) · airframe 59,244 hrs · 46,067 cycles

A CRACK WAS FOUND IN THE FUSELAGE SKIN APPROX 2 INCHES LONG AT BS 765, S-19R. DOUBLER INSTALLED PER ER/A 451283-14, REF AD 2004-18-06 & 2005-13-30.

Part: SKIN — CRACKED (FUSELAGE) · airframe 56,895 hrs · 44,336 cycles

A 1 INCH CRACK WAS FOUND IN THE CORNER OF THE LOWER HINGE CUTOUT OF THE L2 DOOR CUTOUT. THE CRACK WAS ROUTED OUT OF THE SKIN AND THE UNDERLYING BEARSTRAP INSPECTED TO ENSURE IT WAS CRACK FREE. THE SKIN CRACK CUTOUT WAS REPAIRED WITH AN EXTERNAL STEEL DOUBLER PER B737 SRM AND PER ER/A 095094-14.

Part: SKIN — CRACKED (FUSELAGE) · airframe 56,649 hrs · 44,152 cycles

THE LOWER AFT CORNER OF THE RIGHT WING SCANNING LIGHT CUTOUT AT FS 530 WAS FOUND WITH A .5 INCH CRACK IN THE SKIN. THE CRACK WAS REMOVED WITH A SMALL CUTOUT AND REPAIRED WITH AN EXTERNAL ALUMINUM REPAIR DOUBLER PER ER/A 094021-14.

Part: FLOORBEAM — CRACKED (FUSELAGE) · airframe 56,649 hrs · 44,152 cycles

INSPECTION OF THE LBL AND RBL 24.82 LONGITUDINAL FLOORBEAMS OVER THE CENTER WING REVEALED CRACKS IN THE BEAM WEB AND CAP AT THE AILERON QUADRANT CUTOUTS AT FS 679. THE CRACKS ARE TYPICAL OF AD 2001-17-18. THE CRACKED AREA WAS REPAIRED BY REPLACING THE BEAM CHORDS, TRIMMING THE BEAM WEB, AND INSTALLING ALUMINUM REPAIR DOUBLERS PER ER/A 094024-14AD.

Part: CHARGER — INOPERATIVE (EMERGENCY EXIT) · airframe 56,472 hrs · 44,019 cycles

EMERGENCY EXIT SIGN AT FWD LEFT DOOR AND OTHER LIGHTS ASSOCIATED WITH BATTERY PACK M1133 ARE INOP. FOUND THAT THIS BATTERY PACK WOULD NOT COMPLETELY SHUTOFF AND WAS DRAINING THE BATTERY. REPLACED THE RACK AND THE BATTERY. ALL NORMAL.

Part: PUMP — MALFUNCTIONED (FUEL BOOST) · airframe 56,246 hrs · 43,843 cycles

ON TAKEOFF NR 2 TANK FWD BOOST PUMP C/B POPPED. FWD NR 2 TANK FWD BOOST PUMP TO MCO/PLCRD PER MEL 28-00-01B. NOTE: NR 2 TANK AFT BOOST PUMP ON MCO/CNTRL C08194634. REPLACED NR 2 AFT BOOST PUMP, S/N 10131125BMANUF, P/N 258000-5. MCO/PLCRD REMOVED.

Part: BATTERY PACK — DISCHARGED (CABIN) · airframe 55,865 hrs · 43,561 cycles

FORWARD EMERGENCY LIGHTS INOP. REPLACED BATTERY PACK.

Part: CONNECTOR — NOT SEATED (CABIN) · airframe 55,736 hrs · 43,466 cycles

EMERGENCY EXIT LIGHT COME ON AND GO OUT OFF WITHOUT A POWER FAILURE. RESET PLUG ON E-PATH POWER SUPPLY. NO OCCURRENCE NOTED.

Part: HOSE — LEAKING (NR 2 ENG HYD SYS) · airframe 54,889 hrs · 42,811 cycles

LOSS OF A-SYSTEM HYDRAULICS IN FLIGHT. FOUND NR 2 ENGINE HYDRAULIC PUMP PRESSURE HOSE LEAKING. REPLACED NR 2 ENG HYDRAULIC PRESSURE HOSE. HOSE LEAK CHECKS GOOD. SERVICED A-SYSTEM HYDRAULICS TO FULL. SPUN & RAN ENGINE PRESSURE AND LEAK CHECK GOOD.

Part: SKIN — CRACKED (FUSELAGE) · airframe 54,782 hrs · 42,722 cycles

INSPECTIONS REQUIRED PER AD 2003-08-15 REVEALED SEVERAL CRACKS IN THE STRINGER 4R SKIN LAP JOINT BETWEEN FS 380 & 420. THE CRACKS WERE REMOVED WITH CUTOUTS AND REPAIRED PER B737 SRM 53-30-3, 42. THE REPAIR WAS DOCUMENTED PER ER/A 087961-14AD.

Part: SKIN — CRACKED (FUSELAGE) · airframe 54,782 hrs · 42,722 cycles

INSPECTION OF THE STRINGER 4R SKIN LAP JOINT REVEALED 15 CRACK INDICATIONS IN THE SKIN PANEL BETWEEN FS 540 & 727. THE INSPECTIONS WERE PERFORMED PER AD 2003-08-15. THE ENTIRE LAP JOINT WAS TRIMMED OUT AND REPAIRED PER BAC S/B 737-53A1177. THE REPAIR WAS DOCUMENTED PER ER/A 087962-14AD.

Part: SKIN — CRACKED (FUSELAGE) · airframe 54,782 hrs · 42,722 cycles

INSPECTION OF THE STRINGER 4L SKIN LAP JOINT PER AD 2003-08-15 REVEALED A CRACKED FASTENER LOCATION AT FS 867. THE CRACK WAS REMOVED WITH A CUTOUT TO THE SKIN WITH ADDITIONAL INSPECTIONS TO ENSURE NO FURTHER CRACKS. THE AREA WAS REPAIRED PER B737 SRM 53-30-3, FIG 42 AN DOCUMENTED PER ER/A 087963-14AD.

Part: POWER SUPPLY — DISCHARGED (CABIN) · airframe 54,353 hrs · 42,362 cycles

DURING LAYOVER CHECK FOUND EMERGENCY ESCAPE PATH LIGHTING FROM ROW 11 THRU AFT CABIN BLINKING ON AND OFF WHEN THE SWITCH WAS OFF. REPLACED POWER SUPPLY (M9013) AND BATTERY PACK. ALL OPS NORMAL.

Part: SKIN — DEBONDED (LT WING TE FLAP) · airframe 53,891 hrs · 41,993 cycles

LT OUTBOARD AFT FLAP T/E WEDGE DISBONDED. T/E WEDGE REPAIRED PER ER/A 423067-14.

Part: SKIN — CRACKED (LT WING) · airframe 53,693 hrs · 41,825 cycles

THE LT WING UPPER SKIN WAS FOUND WITH A 1.5 INCH CRACK EXTENDING FWD FROM THE AFT EDGE OF THE SKIN AT THE REAR SPAR AT WBL 170. THE CRACK WAS REMOVED WITHA 2 X 1 INCHES CUTOUT IN THE SKIN AND REPAIRED WITH 2 EXTERNAL ALUMINUM REPAIR DOUBLERS PER ER/A 384859-14, REV A.

Part: WEDGE — DELAMINATED (RT WING) · airframe 53,629 hrs · 41,770 cycles

RT INBOARD AFT FLAP T/E WEDGE DELAMINATED. REPAIRED PER ER/A 422903-14.

Part: BATTERY PACK — DISCHARGED (CABIN) · airframe 51,805 hrs · 40,910 cycles

EMERGENCY LIGHT SWITCH OFF, AFT SEAT EMERGENCY LIGHTS STAY ON. REPLACED BATTERY PACK, OPS NORMAL.

Part: SKIN — DELAMINATED (T/E FLAP) · airframe 51,417 hrs · 40,744 cycles

INBOARD AFT FLAP TRAILING EDGE BONDED ASSEMBLY WAS FOUND WITH SKIN TO CORE DELAMINATION. REPAIR PER ER/A 417316-14.

Part: FLAP — DELAMINATED (LT WING) · airframe 51,417 hrs · 40,744 cycles

LEFT INBOARD AFT FLAP TRAILING EDGE BONDED ASSY WAS FOUND WITH MULTIPLE DELAMINATED AREAS. REPAIR PER ER/A 417277-14.

Part: MOUNT — DAMAGED (ENGINE) · airframe 51,306 hrs · 40,695 cycles

FWD ENGINE MOUNT SUPPORT FITTING ASSY WAS FOUND WITH OVERSIZED MOUNT HOLES. REPAIR PER ER/A 410550-14AD.

Part: SUPPORT FITTING — DAMAGED (ENGINE MOUNT) · airframe 50,589 hrs · 40,385 cycles

THE FWD ENGINE MOUNT SUPPORT FITTING ASSY WAS FOUND WITH DAMAGED MOUNT HOLES. THE HOLES WERE OVERSIZED TO CLEAN UP ALL DAMAGE. REPAIR PER ER/A 402105-14AD.

Part: DOOR FRAME — CRACKED (FUSELAGE) · airframe 49,744 hrs · 40,022 cycles

C2 CARGO DOOR OPENING FS 794.3, FWD FRAME FOUND WITH A 1.75 IN CRACK. THE CRACK IS TYPICALOF BAC S/B 737-53-1096 AND AD 93-14-10. THE CRACK WAS REMOVED WITH A 2.1 IN TRIMOUT AND REPAIRED WITH AN ALUMINUM DOUBLER PER THE B737 SRM AND ER/A 380692-14AD.

Part: SUPPORT FITTING — DAMAGED (ENGINE MOUNT) · airframe 49,649 hrs · 39,981 cycles

THE FWD ENGINE MOUNT SUPPORT FITTING WAS FOUND DAMAGED DUE TO MIGRATING BEARINGS FOR THE MOUNT HOLES. REPAIR PER ER/A 401670-14AD

Part: MOUNT — WORN (ENGINE) · airframe 49,397 hrs · 39,879 cycles

ENGINE MOUNT SUPPORT FITTING HAD MIGRATING BEARINGS RESULTING IN OVERSIZED MOUNT HOLES. REPAIR PER ER/A 401250-14AD.

Part: MOUNT — WORN (ENGINE) · airframe 49,397 hrs · 39,879 cycles

FWD ENGINE MOUNT WAS FOUND WITH MIGRATING BEARINGS THAT RESULTED IN OVERSIZED MOUNT HOLES. REPAIR PER ER/A 401250-14AD

Part: SKIN — CRACKED (FUSELAGE) · airframe 49,254 hrs · 39,820 cycles

FUSELAGE / FS 1138 / STRG. 12R / HORIZ STAB CUTOUT : CRACK REPAIR INSPECTIONS OF THE FUSELAGE STRUCTURE AROUND THE HORIZONTAL STABILIZER CUTOUT PER BAC S/B 737-53-1134 REVEALED A .5 INCH CRACK IN THE SKIN AND UNDERLYING STRINGER STRAP JUST FWD OF FS 1138 AND JUST ABOVE STRINGER 12R. A 3 INCH CRACK WAS FOUND IN THE STRINGER STRAP AND FRAME STRAP AT THE FS 1138 FRAME AND S-12R INTERECTION. THE SKIN WAS CUTOUT AND NEW SECTIONSOF STRINGER AND FRAME STRAP SPLICED IN PER ER/A 380221-14.

Part: VALVE — FAILED (RT A/C PACK) · airframe 48,603 hrs · 39,542 cycles

A/C FAILED TO PRESSURIZE . INSPA/C DOORS AND SEALS ,RAN CABIN PRESSIZATION CHECK PER MM .PRESS A/C CHECK GOOD .REP RT PAC 35DEG SENSOR AND AIR MIX VLV ,REMOVE MCO PLAC FRM RT PAC .RAN ENGS PRESS SYS CK GOOD .

Part: MODULE — WORN (COCKPIT) · airframe 48,253 hrs · 39,390 cycles

DISCOVERED SEVERAL CHAFED AND BROKEN WIRES IN A BUNDLE PASSING UNDER THE A/C POWER CONTROL BOX MOUNTED BEHIND THE PILOT''S OVERHEAD INST PANEL. REPAIRED ASSOCIATED WIRING AND REPLACED THE A/C POWER CONTROL PANEL. NO FAULTS WERE DETECTED IN FLT DISC FOUND WHILE AT GATE.

Part: INDICATOR — MALFUNCTIONED (NR 2 ENG OIL) · airframe 47,591 hrs · 39,106 cycles

NR 2 ENGINE OIL TEMP GAUGE READING ABOVE RED LIMIT ALL OTHER ENGINE INDICATIONS READ NORMAL. A/C DIVERTED TO ATL OFF FLT 2426. FOUND OIL TEMP GAUGE PEGGED HIGH. REPLACED OIL TEMP BULB, CKS GOOD.

Part: ACM — LEAKING (LT A/C BAY) · airframe 46,762 hrs · 38,736 cycles

AFTER LANDING, CABIN FILLED WITH SMOKE. SHUTOFF APU BLEED AND BOTH PACKS, SMOKE DISSIPATED. FOUND OIL COMING OUT OF LT ACM INTO DUCT. REPLACED ACM, BOTH LT AND RT WATER COALESCER BAGS. RAN BOTH PACKS WITH APU AND ENGS, LEAK CHECK OK. NO SMOKE IN CABIN NOTED.

Part: SMOKE — DETECTED (CABIN) · airframe 46,483 hrs · 38,614 cycles

TAXIING TO GATE, APU BLEED SOURCE SELECTED. RT PACK TURNED ON AND LITE SMOKE ENTERED CABIN. CONTRACT MTC. RAN APU FOR OVER AN HOUR WITH NO FURTHER FUMES/SMOKING. INSPECTED PACK BAY FOR ANY EVIDENCE OF HYDRAULIC LEAKS, NONE FOUND. UNABLE TO DUPLICATE PROBLEM.

Part: UNION — LOOSE (RT WING)

LOST ALL 'A' SYSTEM HYDRAULIC FLUID. FOUND B-NUT LOOSE AT RT REV PRESSURE SWITCH, TIGHTENED SAME, CKS GOOD.

Part: FUEL CONTROL — MALFUNCTIONED (NR 1 ENGINE)

NR 1 ENGINE COMPRESSOR STALLS AT FL370. AC YAWED LT EACH TIME AND N1 AND F/FLOW GAUGES FLUXED. N1 GAUGE WOULD SPIKE 5PC DROP. 5 SPIKES AT 1 SECOND INTERVALS. FLT DIVERSION TO MCO. INSP ENG COMPRESSOR AND EXH WITH BOROSCOPE. NO TROUBLE FOUND. CKED PS3 FILTER AND ALL ASSOC BLEED CONTROL LINES. REPLACED FUEL PUMP AND FUEL CONTROL PER MM. OPN AND LEAK CK OK PER PFHB. SNAP ACCEL/DECELL OK. BLEED SHIFT OK.

Part: SKIN — CRACKED (BS 520)

A CRACK WAS FOUND IN THE SKIN AT FS 520 AND STR 16L. THE UNDERLYING STRINGER WAS FOUND WITH A TYPICAL CRACK AT THE END OF THE STRINGER AS OUTLINED IN BAC S/B 737-53-1145. THE SKIN WAS REPAIRED WITH AN EXTERNAL DOUBLER PER SRM PROCEDURE AND THE STRINGER WAS REPAIRED PER THE S/B. THE REPAIR WAS DOCUMENTED PER ER/A 365541-14.

Part: LIGHT — INOPERATIVE (CABIN)

FOUND ON SVC CK, 2 FWD LT SIDE EXTERIOR EMERGENCY LIGHT INOP. REPLACED REFLECTOR AND SOCKET.

Part: SKIN — LIGHTNING STRIKE (BS 727-777)

THE WINDOW BELT SKIN BETWEEN FS 727 AND 777 WAS FOUND WITH SIX LIGHTNING STRIKE DAMAGE LOCATIONS. TWO OF THE LOCATIONS WERE REPAIRED BY DRILLING OUT AND INSTALLING .25 INCH DIA RIVETS PER THE B737 SRM. THE REMAINING LOCATIONS WERE BLENDED OR CUT OUT AND REPAIRED WITH CONTINUOUS DOUBLER AND TRIPLER PER ER/A 331583-14, REV A.

Part: BULKHEAD WEB — CRACKED (BS 178)

THE FS 178 BULKHEAD WEB WAS FOUND WITH SEVERAL CRACKS IN THE AREA OF RBL 5.7 AND LBL 5.7 BETWEEN WL 190 AND 210. THE WEB STRAP AT RBL 5.7 WAS ALSO CRACKED. THE CRACKS WERE CUT OUT AND A SINGLE WEB DOUBLER INSTALLED TO ENCOMPASS ALL OF THE CUT OUTS. THE STRAP WAS REPAIRED WITH AN ALUMINUM STRAP DOUBLER. THE REPAIR WAS ACCOMPLISHED PER ER/A 331603-14, REV A.

Part: BATTERIES — DISCHARGED (CABIN)

ON MAINTENANCE CHECK, FOUND FWD GALLEY OUTBOARD POSITION EMERGENCY FLASHLIGHT INDICATOR LED NOT FLASHING. REPLACED BATTERY AND BULB.

Part: LIGHT — FAILED (CABIN)

EXTERIOR EMERGENCY LIGHT AT L1 DOOR INOP.

Part: SKIN — CRACKED (R1 DOOR CUTOUT)

A CRACK WAS FOUND IN THE LOWER AFT CORNER OF THE R-1 DOOR. THE SKIN PANEL AND THE BONDED DOUBLER AT THIS REGION WAS REPLACED. THERE WAS STILL A CRACK IN THE BEAR STRAP. THE CRACK IN THE BEAR STRAP WAS CUT OUT WHILE PERFORMING A REPAIR FOR THIS CORNER PER SRM 53-30-3, FIG 26. MTC SHORTENED THE NUMBER TWO PLATE, OMITTING 1 FASTENER LOCATION IN THE MIDDLE PLATE ONLY. THE OUTER PLATE IS 0.10 2024-T3 AND THE INNER PLATE IS 0.063 CLAD 2024-T3. ACCOMPLISHED REPAIRS PER DL ERA 303360-14.

Part: BULKHEAD WEB — CRACKED (BS 178)

DURING INSPECTION PER SI 3-69482-12, THE WEB OF FS 178 BULKHEAD WAS FOUND WITH FOUR CRACKS, EACH MEASURING APPROX 1 INCH, AT LBL 5.7 AND WL 195 AND RBL 5.7 AND WL 195. THE WEB IS MANUFACTURED FROM 0.040 CLAD 2024-T3, ER/A ISSUED FOR REPAIR.

Part: SKIN — CRACKED (BS 379)

THE SKIN AT THE COOLING DUCT CUTOUT, BS 379 BL 0 WAS FOUND CRACKED AT THE AFT EDGE OF THE CUTOUT. THE CRACK IS APPROX 1.5 INCH IN LENGTH AND IS TYPICAL OF CRACKS DESCRIBED IN BACO SB 737-53-1117 R1. CRACK FOUND AT MID VISIT IN ATL. THE CRACK WILL BE STOP DRILLED AND A PERMANENT REPAIR WILL BE INSTALLED PER THE BACO SERVICE BULLETIN REF DL ERA 303327-14.

Part: SPRING — BROKEN (AILERON CONTROL)

WHEN MAKING TURNS, CONTROL YOKE DOES NOT RETURN TO CENTER. IT MUST BE MANUALLY CENTERED. ROUND AILERON RETURN SPRINGS FOR MANUAL YOKE CENTERING BROKEN. REPLACED SPRINGS. OPERATION NORMAL.