Service difficulty report · Support · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
April 25, 2022
Operation
Air carrier
Aircraft
N769SW
Make and model
Boeing 7377H4
Aircraft serial
30588
Aircraft time
74,146 hours, 43,614 cycles
Part
Support
Condition
Corroded
Location
Aft Cargo
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 L/H FLOOR TO SIDEWALL SUPPORT FROM STA 727+4 TO STA 847; LBL 24; WL 156 TO WL 160. / [01] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS OF AFT CARGO BAY L/H FLOOR TO SIDEWALL SUPPORT BS 727+4 TO BS 847 LBL 24 WL 156;TO WL 160 IAW SRM 53-00-53-1A-2 ALLOWABLE DAMACE 2.;[04] FABRIACATED LOCATED AND DRILLED ON AFT CARGO BAY L/H NEW FLOOR TO SIDEWALL SUPPORT BS 727 TO BS 847;LBL 24 WL 156 TO 160 MATERIAL USED BAC 1496-377#7075T62 LOT#1484618-1;AND SPLICE BTW BS 727'E' TO 747;LBL 24 WL 156 TO 160;MATERIAL USED BAC1496-377#7075T62 LOT#1484618-1;IAW SRM 51-40-05 ;SRM 53-00-53-2R-6 REPAIR 6 AND DWG 146A7502 REV:A.;[05] OK TO TREAT AND PRIME;[06] VERIFIED CORRECTIVE ACTION 4 AND 5. OK TO TREAT AND PRIME.;[07] APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON AFT CARGO BAY L/H NEW FLOOR TO SIDEWALL SUPPORT BS 727 TO BS 847 LBL 24 WL 156 TO 160 IAW SRM 51-20-01 AND AMM 51-21-72-370-804;OK TO INSTALL SPLICE.;[08] VERIFIED CORRECTIVE ACTION 7. OK TO INSTALL SPLICE;[09] INSTALLED SPLICE ON AFT CARGO BAY L/H FLOOR TO SIDEWALL SUPPORT BTW 727 'E' TO BS 747;LBL 24 WL 156 TO WL 160 IAW SRM53-00-53-2R-6 REPAIR 6 AND SRM 51-40-02;[10] VERIFIED CORRECTIVE ACTION 9.;[11] VERIFIED JOB COMPLETE

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