Service difficulty report · Support · Boeing 7377H4

Difficulty date
June 8, 2023
Submitted
July 17, 2023
Operation
Air carrier
Aircraft
N963WN
Make and model
Boeing 7377H4
Aircraft serial
36676
Aircraft time
38,123 hours, 23,431 cycles
Part
Support
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CORROSION ON AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT AT STATIONS: 727D+14; 727E+6; 727E+8; 727E+10; 727E+14; 727E+15; 727E+18; 747+2; 747+6; 747+10. CORRECTION: LBL 22 WL 156<[01] PARTIAL UPDATED ON STEPS 1 - 10;[02] VERIFIED APPLICABILITY OF SRM 53-00-53-1A-2.;[03] VERIFIED PARTIAL STEPS 1-10; CORRECTIVE ACTION 2; AND MEASUREMENT TABLE;[04] RESOLUTION OF FAULTS: TTG8Q00LHNCG; TTG8Q00LHMJV; TTG8Q00LHP1C; TTG8Q00LHP1C; TTG8Q00LHNCG; TTG8Q00LHMJV TO BE ACCOMPLISHED ON THIS FAULT.;[05] REMOVED AFT CARGO BAY FLOOR TO SIDE WALL SUPPORT ANGLE BS 727 TO 847 I.A.W SRM 51-40-02-0G-0.;[06] FABRICATED AND DRILLED NEW AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT AT BS727-BS847 LBL22 WL 156 AND NEW SPLICE REPAIR WITH NEXT MATERIAL BAC1496-377#7075T62 LOT 1526048-1 I.A. W SRM 51-40-05-0G-0; SRM 53-00-53-2R-6 REPAIR 6 AND DWG 146A7502; APPLIED CHEMICAL CONVERSION COATING TO THE REPAIR PARTS I.A. W SRM 51-20-01. OK TO PRIME.;[07] VERIFIED CORRECTIVE ACTION 5 AND 6 OK TO PRIME<BR><BR>COMPLETED STEPS 1-10;[08] APPLIED PRIMER ON FLOOR TO SIDEWALL SUPPORT IAW SOPM 20-41-02.<BR>OK TO INSTALL SPLICE BS 747+10;[09] VERIFIED CORRECTIVE ACTION 8 OK TO INSTALL;[10] INSTALLED ON FLOOR TO SIDEWALL SUPPORT SPLICE SIDEPLATE BS747+10 IAW SRM 53-00-53-2R-6 REPAIR 6;[19] INSTALLED FLOOR TO SIDEWALL SUPPORT BS 727 TO BS 847 LBL22 WL 156 IAW SRM 51-40-02 AND DWG 146A7502.;[20] VERIFIED STEP #19. OK FOR SERVICE

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