N120HQ

Part: SHEAR PANEL — CORRODED · airframe 35,482 hrs · 27,306 cycles

CORROSION ON SHEAR CLIP FR88 BETWEEN ST27R AND 28R. REMOVED AND REPLACED SHEAR CLIP AT FR88 BETWEEN ST 27R AND 28R REF SRM 51-40-08

Part: SHEAR ANGLE — CORRODED (ZONE 100) · airframe 35,482 hrs · 27,306 cycles

CORROSION ON AFT FUSELAGE INTERNAL ON SHEAR CLIP FORWARD INBOARD SIDE AT FR87 BETWEEN ST27R AND 28R ON SHEAR CLIP FORWARD INBOARD SIDE. : REMOVED AND REPLACED NEW SHEAR CLIP AT FR87 BETWEEN ST27R AND 28R REF SRM 51-40-08.

Part: SKIN — CRACKED (ZONE 500) · airframe 35,482 hrs · 27,306 cycles

L/H WING LOWER SKIN CRACKED 16MM LONG AT FASTENER OTBD OF RIB 4A AND AFT OF SPAR 2 (HFEC VERIFIED). PERFORMED TEMPORARY REPAIR BY CUTOUT AND DOUBLER INSTALLATION ON L/H WING LOWER SKIN OTBD OF RIB 4A IN ACCORDANCE WITH, REF ETD2021-170-033505

Part: FLOOR MAT — OUT OF POSITION (CABIN) · airframe 30,030 hrs · 23,396 cycles

L2 DOOR WILL NOT DISARM. INSPECTED L2 DOOR AND FOUND FLOOR MAT TO BE INTERFERING DOOR MECHANISM. TRIMMED COIN MAT IAW AMM 25-24-01. PERFORMED OPERATIONAL CHECK ON L2 DOOR, OPS CHECK GOOD.

Part: SHEAR TIE — CORRODED (FUSELAGE) · corrosion level 2 · airframe 30,030 hrs · 23,396 cycles

DURING HEAVY MAINT CHECK FOUND CORROSION - SHEAR CLIP FR86 STR27R/28R. REMOVED SHEAR CLIP FR 86, STR 27R/28R REF. SRM 51-40-08. REINSTALLED NEW SHEAR CLIP, REF. SRM 51-40-08. APPLIED TOP COAT REF. SRM 51-23-06. TOP COATED AND CIC REF SRM 51-23-04, 51-23-05, 51-23-06. ACFT REMAINS IN HEAVY CHECK UNTIL COMPLETION.

Part: RIB — CRACKED (LT HORIZ STAB) · airframe 30,030 hrs · 23,396 cycles

WHILE IN HEAVY CHECK - MAJOR REPAIR - LT HORIZONTAL STABILIZER RIB 12 CRACKED AS MARKED. REMOVED AND REPLACED RIB 12A ON LT HORIZONTAL STABILIZER AND RESTORED SURFACE PROTECTION REF SRM 51-40-08, 51-23-04, 51-23-05, 51-23-06.

Part: STRUCTURE — DENTED (FUSELAGE) · airframe 30,030 hrs · 23,396 cycles

WHILE IN HEAVY CHECK - INBD DEFERAL - MAJOR REPAIR - DENTS IN FUSELAGE BELOW CAPTIONS WINDOW FORWARD OF EXISTING NR 3 REPAIR. PERFORMED PERMANENT REPAIR BY FABRICATING AND INSTALLING DOUBLER AT LT FF FR11-12 STR 15L IN ACCORDANCE WITH REF ETD2017-170-076298.

Part: SHEAR TIE — CORRODED (FUSELAGE) · corrosion level 2 · airframe 30,030 hrs · 23,396 cycles

DURING HEAVY CHECK FOUND CORROSION - SHEAR CLIP FR83 STR27R/28R. REMOVED SHEAR CLIP FR 83, STR 27R/28R, INSTALLED FR 83, STR 27R/28R SHEAR CLIP REF. SRM 51-40-08. APPLIED TOP COAT REF. SRM 51-23-06. APPLIED TOP COAT AS REQUIRED REF SRM 51-23-04,51-23-05. 51-23-6. ACFT REMAINS IN HEAVY CHECK UNTIL COMPLETION.

Part: STRUCTURE — DENTED (FUSELAGE) · airframe 30,030 hrs · 23,396 cycles

DURING HEAVY CHECK - INBOUND DMI - MAJOR REPAIR - FORWARD RT SIDE FUSELAGE NOSE DENT. REPAIRED 3EA DENTS, BETWEEN FRAME- 1/FRAME2 AND STR 26R/27R, BY CUTTING OUT DAMAGE. REPAIR PARTS WERE FABRICATED, LOCATED AND INSTALLED AT FRAME1 - FRAME 2 AND STR 26R/27R. REF SRM 53-10-01/R12, AND PREPPED AND PAINTED REPAIR AREA REF SRM 51-23-06.

Part: SEAT TRACK — CORRODED (FUSELAGE) · corrosion level 2 · airframe 30,300 hrs · 23,396 cycles

LT INBD SEAT TRACK CORRODED AS MARKED AT FRAME 84. CUT OUT DAMAGED SEAT TRACK LT INBD , FRAME 84-82. REF ETD2019-170-060052, SRM: 1583 PART II 53-00-10/REPAIR 01P. FABRICATED SEAT TRACK REPAIR FROM MATERIALS LISTED, SPLICE ANGLES (3 EACH) 7475-T761, .080" PO# 232478. LOWER FLANGE SPLICE, 7475-T761, 0.125" INSTALLED FASTENERS ON LT INBD SEAT TRACK AT FRAME 84 REF SRM 51-40-08. APPLY SURFACE PROTECTION TO SEAT TRACK AND FASTENERS CORRECTIVE ACTION: APPLIED SURFACE PROTECTION TO SEAT TRACK AND FASTENERS REF SRM 51-23-05 AND 51-23-06. P.O. 246627. SEE W/O H6790 SN 268 FOR WORK DETAILS. AIRCRAFT REMAINS IN HEAVY CHECK BNA.

Part: GUSSET — CORRODED (FUSELAGE) · corrosion level 2 · airframe 30,030 hrs · 23,396 cycles

CORROSION- RT HAND GUSSET PLATE AT FR.90 CORRODED AS MARKED. REMOVED AND REPLACED RT HAND GUSSET PLATE AT FR.90 REF.SRM 51-40-02, SRM 51-23-04. SEE W/O H6790 SN 261 FOR WORK DETAILS. AIRCRAFT REMAINS IN HEAVY CHECK BNA.

Part: DOUBLER — CORRODED (FUSELAGE) · corrosion level 2 · airframe 30,300 hrs · 23,396 cycles

RT FLOORBEAM DOUBLER CORRODED AT FR90 AS MARKED. REMOVED CORRODED RT FLOORBEAM DOUBLER AT FR90. LOCATED, DRILLED, AND APPLIED ALODINE TO NEW RT FLOORBEAM DOUBLER CORRODED INSTALLED RT FLOORBEAM DOUBLER AT FR90 PER REF SRM 51-40-08 APPLIED PRIMER TO RT FLOORBEAM DOUBLER AT FR90 PER REF SRM 51-23-05. SEE W/O H6790 SN 262 FOR WORK DETAILS. AIRCRAFT REMAINS IN HEAVY CHECK BNA.

Part: SHEAR PANEL — CORRODED (FUSELAGE) · corrosion level 2 · airframe 30,030 hrs · 23,396 cycles

RT SHEAR PANEL BETWEEN FR87-88 CORRODED AS MARKED. REMOVED AND REPLACED RT SHEAR PANEL AT FR87-88 REF SRM 51-40-08 RESTORED SURFACE PROTECTION PER SRM 51-23-05, 51-23-06. SEE W/O H6790 SN 259 FOR WORK DETAILS. AIRCRAFT REMAINS IN HEAVY CHECK BNA.

Part: LIGHT — INOPERATIVE (CABIN) · airframe 25,784 hrs · 20,242 cycles

EMERGENCY LIGHT INOPERATIVE RIGHT SIDE ROW 1 - 4. R & R THE LIGHT IAW AMM 33-50-21.

Part: SUPPORT — CORRODED (FRAME 89) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION IN RT SUPPORT AT ANCHOR HOLE FRAME 89. REMOVED AND INSTALL A NEW SUPPORT IAW SRM 51-41-01, SRM 51-42-01, AND SRM 51-43-01.

Part: GUSSET — CORRODED (FRAME 85) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION IN GUSSET AT FRAME 85, STRINGER 19L REMOVED AND INSTALLED A NEW GUSSET IAW SRM 51-43-03.

Part: SEAT TRACK — CORRODED (FRAMES 12-18) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION ON RT SEAT TRACK FRAMES 12 -18 REMOVED AND INSTALLED A NEW SEAT TRACK IAW SRM 51-40-02.

Part: SUPPORT — CORRODED (FRAME 84) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION IN RT SUPPORT AT FRAME 84. REMOVED AND REPLACED THE SUPPORT IAW SRM 51-10-03, AND 51-75-16.

Part: FITTING — CORRODED (FRAME 16) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION ON FWD LAVATORY TIE DOWN FITTING AT FRAME 16. REMOVED AND REPLACED THE FITTING IAW SRM 51-43-03.

Part: SEAT TRACK — CORRODED (FRAMES 16-19) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION ON THE LT SEAT TRACK Y=-273.0 AT FRAMES 16 AND 19. REMOVED AND REPLACED THE SEAT TRACK IAW SRM 51-41-01, SRM 51-41-02, AND SRM 51-43-01.

Part: SEAT TRACK — CORRODED (FRAMES 83-84) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION ON RT SEAT TRACK BETWEEN FRAMES 83 - 84. REMOVED AND INSTALLED A NEW SEAT TRACK IAW SRM 51-43-03.

Part: SUPPORT — CORRODED (FRAMES 17-18) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION AT RT AFT SUPPORT AT WINDSCREEN MOUNTING HOLE BETWEEN FRAMES 17 AND 18. BLENDED IAW ETD2017-170-014631.

Part: CROSSBEAM — CORRODED (FRAME 84) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION ON CENTER CROSSBEAM FRAME 84. REMOVED CORROSION IAW SRM 51-10-03. REPAIRED IAW ETD2017-170-013829.

Part: FLOOR SUPPORT — CORRODED (FRAME 16) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION ON THE FLOOR SUPPORT. REMOVED AND REPLACED THE FLOOR SUPPORT IAW SRM 51-41-02, AND SRM 51-43-02.

Part: STRINGER SPLICE — CORRODED (FRAMES 89-90) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION ON STRINGER 23R AT REAR FUSELAGE TO CFIII CIRCUMFERENTIAL SPLICE JOINT UNDER AFT AVIONICS RACK. REMOVED AND INSTALLED A NEW STRINGER SPLICE IAW SRM 51-41-01 AND 51-43-04.

Part: FITTING — CORRODED (FRAMES 17-18) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION ON THE INBD RT WINDSCREEN TIE DOWN FITTING BETWEEN FRAMES 17 AND 18 REMOVED AND INSTALLED A NEW TIE DOWN FITTING IAW SRM 51-40-02.

Part: GUSSET — CORRODED (FRAME 90) · corrosion level 2 · airframe 24,436 hrs · 19,263 cycles

CORROSION IN RT GUSSET FRAME 90. REMOVED AND INSTALLED NEW GUSSET IAW SRM 51-41-02.

Part: CONTROL UNIT — FAILED (FLAP/SLAT ACT) · airframe 24,384 hrs · 19,223 cycles

CREW RECEIVED A FLAP LOW RATE MESSAGE, FOLLOWED BY AN ODOR OF BURNING PLASTIC. DECLARED AN EMERGENCY, DIVERTED, AND LANDED WITHOUT INDICENT. MAINTENANCE TROUBLESHOT, REMOVED AND REPLACED SF-ACE 2 IAW AMM AND OPS CHECKED GOOD.

Part: LINKAGE — OUT OF ADJUST (R2 DOOR) · airframe 24,382 hrs · 19,222 cycles

CREW REPORTED THAT THE R2 DOOR WOULD NOT ARM. MAINTENANCE ADJUSTED THE DOOR ARM - DISARM LINKAGE IAW AMM AND OPS CHECKED GOOD.

Part: SLIDE — MALFUNCTIONED (R2 DOOR) · airframe 24,372 hrs · 19,216 cycles

CREW REPORTED THAT THE R2 DOOR WAS NOT ARMING. MAINTENANCE REMOVED AND REPLACED R2 DOOR SLIDE AND FLEXBALL KIT IAW AMM AND OPS CHECKED GOOD.

Part: FLASHLIGHT — INOPERATIVE (AFT CABIN) · airframe 23,957 hrs · 18,929 cycles

CREW REPORTED THAT THE AFT FLIGHT ATTENDANT FLASHLIGHT WOULD NOT CHARGE. MAINTENANCE REMOVED AND REPLACED THE FLASHLIGHT IAW AMM AND OPS CHECKED GOOD.

Part: DOOR — OUT OF ADJUST (L1) · airframe 23,904 hrs · 18,892 cycles

CREW EPORTED THAT THE L1 DOOR WOULD NOT CLOSE. MAINTENANCE ADJUSTED THE L1 DOOR IAW AMM AND OPS CHECKED GOOD.

Part: DOOR — OUT OF SEQUENCE (L1) · airframe 23,796 hrs · 18,797 cycles

CREW REPORTED THAT THE L1 DOOR WAS OUT OF SEQUENCE AND HARD TO CLOSE. MAINTENANCE OPENED DOOR WITH OUTSIDE AND INSIDE HANDLE TO PUT BACK IN SEQUENCE IAW AMM AND OPS CHECKED GOOD.

Part: WIRE HARNESS — FAULTY (L1 DOOR) · airframe 23,070 hrs · 18,213 cycles

CREW REPORTED THAT THE L1 DOOR WAS SHOWING OPEN. MAINTENANCE R & R L1 DOOR HARNESS IAW AMM AND OPS CHECKED GOOD.

Part: PROXIMITY SENSOR — FAILED (PAX DOOR) · airframe 23,066 hrs · 18,210 cycles

CREW RECEIVED AN L1 DOOR OPEN INDICATION. AN EMERGENCY WAS NOT DECLARED AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED FORWARD PASSENGER DOOR WARNING PROXIMITY SENSOR IAW AMM AND OPS CHECKED GOOD.

Part: BATTERY PACK — INOPERATIVE (MEGAPHONE) · airframe 21,574 hrs · 17,124 cycles

CREW REPORTED THAT THE MEGAPHONE BATTERY LIGHT WAS NOT FLASHING. MAINTENANCE REPLACED MEGAPHONE BATTERIES IAW AMM AND OPS CHECKED GOOD.

Part: SKIN — DAMAGED (FRAMES 11-12) · airframe 21,460 hrs · 17,035 cycles

DURING HEAVY CHECK, DENT IN FUSELAGE SKIN FROM CONTACT WITH NOSE DOCK. MAINTENANCE CUT OUT DENT IN FUSELAGE SKIN FRAME 11-12, STR 18-19L IAW SRM 53-10-01, FABRICATED AND INSTALLED DOUBLER AND FILLER IAW SRM 53-10-01, 51-75-17.

Part: RIB — DAMAGED (VERTICAL STAB) · airframe 21,460 hrs · 17,035 cycles

DURING HEAVY CHECK, 2 .098 HOLES DRILLED IN RADIUS OF VERTICLE STABILIZER RIB 12. MX COMPLIED WITH PERMANENT REPAIR OF VERTICLE STABILIZER RIB 12 IAW ETD 2015-170-103938.

Part: SPAR — CRACKED (LT WING) · airframe 21,460 hrs · 17,035 cycles

DURING HEAVY CHECK, LT WING SPAR 3 SHOWS CRACK INDICATIONS AT FASTENER REPLACEMENT HOLE. MAINTENANCE REAMED LT WING STUB SPAR 3 UNTIL DAMAGE GONE IAW SRM 51-40-02, INSTALLED NEW BUSHING IAW ETD 2015-170-102707.

Part: SPAR — CRACKED (RT WING) · airframe 21,460 hrs · 17,035 cycles

DURING HEAVY CHECK, RT STUB WING SPAR 3 SHOWS CRACK INDICATIONS AT FASTENER REPLACEMENT HOLE. MAINTENANCE REAMED RT WING STUB SPAR 3 AT FASTENER HOLE TO .435 TO REMOVE DAMAGE IAW SRM 51-40-02, INSTALLED NEW BUSHINGS IN RT STUB WING SPAR 3 IAW ETD 2015-170-102707.

Part: BEAM — CORRODED (ZONE 100) · corrosion level 2 · airframe 21,460 hrs · 17,035 cycles

DURING HEAVY CHECK, WAS REPORTED THAT FWD CARGO DOOR THRESHOLD UPON REMOVAL OF SEAL REST UNDER FWD DOOR SPOOL FITTING ON BEAM IS CORRODED. MAINTENANCE R & R BEAM IAW SRM 51-43-02, 51-23-04, PN 170-67118-003, BEAM.

Part: BEAM — DAMAGED (L2 DOOR) · airframe 21,460 hrs · 17,035 cycles

DURING HEAVY CHECK, A DRILL START IN L2 AFT PASSENGER DOOR AT BEAM NR 5 DURING COMPLETION OF SB 170-52-0056. MAINTENANCE COMPLIED WITH ETD 2015-170-101937 TO REPAIR AFT PASSENGER DOOR REF ETD 2015-170-101937A.

Part: BEAM — DAMAGED (PAX DOOR) · airframe 21,460 hrs · 17,035 cycles

DRILL START IN L2 AFT PASSENGER DOOR AT BEAM NR 5 DURING COMPLETION OF SB 170-520056. MX COMPLIED WITH ETD 2015-170-101937 REPAIR OF AFT PAX DOOR.

Part: FLASHLIGHT — DIM (COCKPIT) · airframe 19,549 hrs · 15,526 cycles

CREW REPORTED THAT THE F/O FLASHLIGHT WAS DIM. MAINTENANCE R & R F/O FLASHLIGHT IAW AMM AND OPS CHECKED GOOD.

Part: FLASHLIGHT — INOPERATIVE (AFT CABIN) · airframe 19,460 hrs · 15,452 cycles

CREW REPORTED THAT THE AFT F/A FLASHLIGHT WAS INOPERATIVE. R & R THE FLASHLIGHT IAW AMM AND OPS CHECKED GOOD.

Part: ACTUATOR — FAILED (SLATS) · airframe 19,076 hrs · 15,143 cycles

CREW RECEIVED A SLAT FAIL MESSAGE. CREW DID A GO-AROUND, RAN QRH AND DECLARED AN EMERGENCY. EMERGENCY VEHICLES WERE NOT ROLLED AND PASSENGERS DID NOT BRACE. CREW LANDED AND TAXIED TO GATE WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND LT OTBD SKEW SENSOR LOOSE AND TIGHTENED. CREW THEN RECEIVED FLAP/SLAT SLOW RATE ADVISORY MESSAGE. MAINTENANCE PLACED FLAP/SLAT SLOW RATE ON MEL IAW AMM. MAINTENANCE LATER R & R THE SLAT/FLAP ACTUATOR IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.

Part: LIGHT — UNSECURE (CABIN) · airframe 18,529 hrs · 14,721 cycles

CREW REPORTED THAT THE EMERGENCY LIGHT IN FRONT OF SEAT 1D WAS LOOSE. MAINTENANCE SECURED THE LIGHT IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.

Part: OXYGEN MASK — UNWANTED DEPLOY (SEAT 17 DF) · airframe 16,082 hrs · 12,843 cycles

CREW REPORTED THAT THE SERVICE DOOR ABOVE SEATS 17 D & F OPENED AND THE O2 MASKS DROPPED OUT. MAINTENANCE RESTOWED PASSENGER O2 MASKS IAW AMM AND OPS CHECKED GOOD.

Part: LINER — CORRODED (APU EXHAUST) · corrosion level 2 · airframe 15,863 hrs · 12,674 cycles

DURING HEAVY CHECK, APU EXHAUST SILENCER LINER CORRODED. MX R & R APU EXHAUST SILENCER LINER IAW AMM 49-82-01, PN 4952615, LINER.

Part: BRACKET — CRACKED (LT A/C PACK DUCT) · airframe 15,863 hrs · 12,674 cycles

DURING HEAVY CHECK, LT PACK DUCT BRACKET CRACKED FWD OF LT PACK ASSY. MX R & R LT DUCT BRACKET COMMON TO LT PACK ASSY IAW SRM 51-40-02 AND 51-41-01. PN 170-92988-401 SUPPORT ASSY. ACFT REMAINS FOR COMPLETION OF HEAVY CHECK.

Part: SUPPORT ANGLE — CRACKED (LT MLG WW) · airframe 15,863 hrs · 12,674 cycles

DURING HEAVY CHECK WAS REPORTED LT WHEEL WELL FWD BULKHEAD UPPER SUPPORT ANGLE CRACKED AT FASTENER. MX R & R SUPPORT ANGLE IN LT WHEELWELL AT FD BULK HEAD (RIB 52) IAW SRM 51-40-02 AND 51-43-01. FCBS 57-01-00-005, PN 170-30709-001 SUPPORT. ACFT REMAINS FOR COMPLETION OF HEAVY CHECK.

Part: STRUCTURE — CORRODED (GALLEY) · corrosion level 2 · airframe 15,863 hrs · 12,674 cycles

DURING HEAVY CHECK, AFT GALLEY AFT HALF CORRODED ON MATTING SURFACE WITH FORWARD HALF. R & R CORRODED TRIM IAW AMM 25-00-23. GALLEY SPIT TRIM.

Part: STRUCTURE — CORRODED (GALLEY) · corrosion level 2 · airframe 15,863 hrs · 12,674 cycles

WHILE IN HEAVY CHECK WAS REPORTED AFT GALLEY FWD HALF HAS CORROSION ON MATING SURFACE WITH AFT HALF. MX R & R CORRODED TRIM IAW AMM 25-00-23, AMM 20-10-01. PN 170-59523-001 GALLEY SPIT TRIM.

Part: PAN — CORRODED (SEATS 4 C-F) · corrosion level 2 · airframe 15,863 hrs · 12,674 cycles

DURING HEAVY CHECK, REPORTED SEATS 4C, 4F, HAVE SURFACE CORROSION ON LOWER SEAT PANS RIVETS. MX R & R CORRODED RIVETS IAW SRM 51-42-01. PN SD54BS RIVET. ACFT REMAINS FOR COMPLETION OF HEAVY CHECK.

Part: WARNING MESSAGE — FALSE ACTIVATION (L2 DOOR) · airframe 15,326 hrs · 12,251 cycles

CREW RECEIVED AN L2 DOOR OPEN INDICATION DURING FLIGHT. DID NOT DECLARE AN EMERGENCY AND LANDED WITHOUT INCIDENT. MX CHECKED DOOR GAPS AND MADE SURE DOOR WAS FLUSH WITH FUSELAGE SKIN. ACFT IS GOOD FOR SERVICE.

Part: BATTERY — DISCHARGED (CABIN) · airframe 15,054 hrs · 12,034 cycles

CREW REPORTED THAT DURING THE PREFLIGHT CHECK, THE EMERGENCY OVERHEAD LIGHT WAS INOP. MX FOUND THE EMERGENCY BATTERY WAS BAD. ACFT WAS FLOWN VIA MX FERRY, WHERE EMERGENCY BATTERY WAS CHANGED IAW AMM AND OPS CHECKED GOOD.

Part: BEAM — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND AT THE L-1 DOOR LOWER BEAM, BETWEEN FRAME 15L AND FRAME 19L. MAINTENANCE REMOVED AND REPLACED THE LOWER BEAM AT THE L-1 DOOR BETWEEN 15L AND 19L IAW EMB 175 SRM 51-40-02, 51-43-03, 51-43-01, 51-41-01, 51-21-02 AND AMM 20-10-05. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.

Part: SEAT TRACK — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND LT FF SEAT TRACK FRAME 16 CORRODED. MAINTENANCE REMOVED AND REPLACED LF FF SEAT TRACK AT FRAME 16 IAW EMB 175 SRM 51-40-02, 51-41-01, 51-43-03, 51-43-04, AND 51-41-02. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.

Part: SEAT TRACK — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND RT FF SEAT TRACK CORRODED. MAINTENANCE REMOVED AND REPLACED RT FF SEAT TRACK IAW EMB 175 SRM 51-40-00. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.

Part: DOUBLER — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND FLOOR DOUBLER AFT OF L1 DOOR BETWEEN FRAME 19-19A CORRODED. MAINTENANCE REMOVED AND REPLACED FLOOR DOUBLER (SHEAR PLATE) IAW EMB 175 SRM 51-40-02, 51-41-02, 51-43-04, AND 51-40-04. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.

Part: PLATE — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND FLOOR SILL PLATE FORWARD OF L1 DOOR CORRODED. MAINTENANCE REMOVED AND REPLACED THE FORWARD L1 DOOR SILL PLATE IAW EMB SRM 51-40-02 AND 51-43-02. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.

Part: SILL — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND FLOOR SILL PLATE FORWARD OF L1 DOOR CORRODED. MAINTENANCE REMOVED AND REPLACED THE FORWARD L1 DOOR SILL PLATE IAW EMB 175 51-40-02 AND 51-43-02. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.

Part: DAMPENER — CORRODED (L1 DOOR) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND L1 DOOR DAMPNER CORRODED. MAINTENANCE REMOVED AND REPLACED THE L1 DOOR DAMPNER IAW EMB175AMM 52-11-27. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.

Part: DAMPENER — CORRODED (R1 DOOR) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE R1 DOOR DAMPNER CORRODED. MAINTENANCE REMOVED AND REPLACED THE R1 DOOR DAMPNER IAW EMB175AMM 52-41-27. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.

Part: DOUBLER — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND AT THE FORWARD LAV FLOOR DOUBLER BETWEEN FRAME 13 AND 16. MAINTENANCE REMOVED AND REPLACED THE FLOOR DOUBLER BETWEEN FRAME 13 & 16 IAW EMB 175 SRM 51-41-02. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.

Part: FASTENER — CORRODED (LE SLAT) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND HARDWARE CORRODED ON RIGHT WING NUMBER 1 LOWER SLAT SEALS. MAINTENANCE REMOVED AND REPLACED HARDWARE FOR THE RIGHT WING NUMBER 1 LOWER SLAT SEALS IAW AMM 57-41-09. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK. SLAT SEAL P/N'S 170-35160-001, 170-35161-001, 170-35162-001, AND 170-35163-001 ALSO REPLACED.

Part: NUT PLATE — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE FWD CARGO DOOR CUTOUT LOWER SILL PLATE NUT PLATES ARE CORRODED. MAINTENANCE REMOVED CORROSION REMOVED AND REPLACED THE NUT PLATE STRAPS IAW EMB 175SRM 51-41-02, 51-12-01, AND 51-00-00. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.

Part: RIVET — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE FORWARD CARGO DOOR SURROUND LOWER TRIM NUT PLATE SUPPORTS HAVE CORRODED RIVETS. MAINTENANCE REMOVED AND REPLACED CORRODED RIVETS ON FORWARD CARGO DOOR SURROUND LOWER TRIM NUT PLATE SUPPORTS IAW EMB 175 SRM 51-41-01. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.

Part: BRACKET — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON THE LT & RT FLOOR SUPPORT BRACKETS AT FRAME 86. MAINTENANCE REMOVED AND REPLACED THE LT & RT FLOOR SUPPORT BRACKET PANEL ASSEMBLIES AT FRAME 86 IAW EMB 170/175 SRM 51-41-01. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.

Part: GUSSET — CORRODED (FUSELAGE) · corrosion level 2 · airframe 11,252 hrs · 9,113 cycles

WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON THE UPPER CENTER GUSSET AT FRAME 90. MAINTENANCE REMOVED & REPLACED THE UPPER CENTER GUSSET AT FRAME 90 IAW EMB 170/175 SRM 51-41-02 & 51-23-06. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.

Part: POWER SUPPLY — INOPERATIVE (EMERGENCY LIGHTS) · airframe 10,570 hrs · 8,572 cycles

L-2 DOOR EMERGENCY LIGHTS WOULDN'T ILLUMINATE. MAINTENANCE REMOVED AND REPLACED ELPU PER EMB AMM.

Part: INDICATION SYS — FALSE ACTIVATION (COCKPIT) · airframe 9,462 hrs · 7,695 cycles

CREW REPORTED L-1 DOOR LATCH INDICATION WASN'T COMING DOWN. MAINTENANCE PERFORMED OPERATIONAL CHECK OF L-1 DOOR LATCH INDICATION PER EMB AMM, AND REPORTED OPS CHECK GOOD.

Part: HANDLE — LACK OF LUBE (L2 DOOR) · airframe 8,160 hrs · 6,642 cycles

CREW REPORTED L-2 DOOR WOULDN'T CLOSE. MAINTENANCE LUBED DOOR HANDLE PER EMB AMM AND REPORTED OPS CHECK GOOD.

Part: ROLLER — LACK OF LUBE (R1 DOOR) · airframe 8,158 hrs · 6,640 cycles

CREW REPORTED R1 DOOR WAS DIFFICULT TO CLOSE. MX LUBED DOOR ROLLERS PER EMB AMM, OPS CHECK GOOD.

Part: MODULE — INOPERATIVE (PA SYSTEM) · airframe 5,786 hrs · 4,696 cycles

EMERGENCY PA INOP. MTX REMOVED AND REPLACED NIM 1 IN MRC 1 AND PA CONTROLLER, OPS CHECK GOOD.