Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
August 2, 2021
Submitted
September 14, 2021
Operation
Air carrier
Aircraft
N491WN
Make and model
Boeing 7377H4
Aircraft serial
33867
Aircraft time
53,758 hours, 31,898 cycles
Part
Intercostal
Condition
Corroded
Location
Bs 769 Rbl 6
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 BS769 RBL6 WL152. ; / [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 CORRECTIVE ACTION ENTRY 1.; [03] REMOVED INTERCOSTAL AT BS 767-787 RBL 6 WL 152 PER SRM 51-40-02-0G-0.; [04] RECEIVED FABRICATED INTERCOSTAL; P.O.#832535.; [05] VERIFIED RECEIVED FABRICATED INTERCOSTAL; P.O.#832535.; [06] LOCATED; DRILLED; DEBURRED INTERCOSTAL; PER SRM 51-40-05-0G-0; & DWG 146A8130; APPLIED A CHEMICAL CONVERSION COATING PER AMM 51-21-41-370-802.; [07] VERIFIED LOCATED; DRILLED; DEBURRED INTERCOSTAL; PER SRM 51-40-05-0G-0; & DWG 146A8130; APPLIED A CHEMICAL CONVERSION COATING PER AMM 51-21-41-370-802.; [08] PRIMED INTERCOSTAL PART PER AMM 51-21-72-370-804; OK TO INSTALL PART.; [09] VERIFIED PRIMED INTERCOSTAL PART PER AMM 51-21-72-370-804; OK TO INSTALL PART.; [10] BEGAN INSTALLING FASTENERS IN INTERCOSTAL PER SRM 51-40-02-0G-0 & DWG 146A8130; [11] INSTALLED FASTENERS IN INTERCOSTAL PER SRM 51-40-02-0G-0; & DWG 146A8130; [12] VERIFIED INSTALLED FASTENERS IN INTERCOSTAL PER SRM 51-40-02-0G-0; & DWG 146A8130

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