Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
August 11, 2021
Submitted
September 7, 2021
Operation
Air carrier
Aircraft
N755SA
Make and model
Boeing 7377H4
Aircraft serial
27871
Aircraft time
74,723 hours, 44,099 cycles
Part
Intercostal
Condition
Corroded
Location
Bs 928
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 INTERCOSTAL AT AFT CARGO BAY BS928 RBL3 WL168. ; / [01] EVALUATED CORROSION; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0; [02] VERIFIED EVALUATED CORROSION; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0; [03] REMOVED ACB INTERCOSTAL AT BS927 - BS947; RBL3; WL168 PER SRM 51-40-02-0G-0; [04] RECEIVED INTERCOSTAL FROM HEAT TREAT/FORM PO#833545; [05] VERIFIED CORRECTIVE ACTION ITEMS 3 AND 4; [06] LOCATED AND DRILLED ACB INTERCOSTAL AT BS927 - BS947; RBL3; WL168 PER SRM 51-40-05-0G-0 AND DWG 147A7500; [07] APPLIED CHEMICAL CONVERSION COATING AND PRIMER TO INTERCOSTAL PER AMM 51-21-41-370-802; AMM 51-21-72-370-804. OK TO INSTALL; [08] VERIFIED CORRECTIVE ACTION ITEMS 6 AND 7; OK TO INSTALL; [09] INSTALLED INTERCOSTAL PER SRM 51-40-02-0G-0; AND DWG 147A7500; [10] VERIFIED INSTALLED INTERCOSTAL PER SRM 51-40-02-0G-0; AND DWG 147A7500; [11] RII; VERIFIED GOOD INSTALLTION OF INTERCOSTAL PER SRM 51-40-02-0G-0; AND DWG 147A7500.; [12] COMPLETED JOB PER SRM 51-40-02-0G AND DWG 147A7500; [13] VERIFIED COMPLETED

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