Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
June 9, 2021
Submitted
July 15, 2021
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
54,253 hours, 32,244 cycles
Part
Intercostal
Condition
Corroded
Location
Fuselage
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 BS796 RBL6 WL153. ; / [01] REMOVED INTERCOSTAL ;BS 787-807 RBL6 WL 153 PER SRM 51-40-02-0G-0.; [02] EVALUATED CORROSION ON INTERCOSTAL; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0; [03] VERIFIED PART FOUND OUT OF LIMITS DUE NO SRM LIMITS ESTABLISHED; PER SRM 51-10-02; [04] LOCATED; DRILLED; AND DEBURRED NEW INTERCOSTAL ACB BS 787-807; RBL 6; WL 153 IAW SRM 51-40-05-0G-0; DWG #146A8130. OK TO INSTALL.; [05] VERIFIED LOCATED; DRILLED; AND DEBURRED NEW INTERCOSTAL ACB BS 787-807; RBL 6; WL 153 IAW SRM 51-40-05-0G-0; DWG #146A8130. OK TO INSTALL.; [06] INSTALLED NEW INTERCOSTAL ACB BS 787-807; RBL 6; WL 153 IAW SRM 51-40-02-0G-0; DWG #146A8130.; [07] VERIFIED INSTALLATION OF NEW INTERCOSTAL ACB BS 787-807; RBL 6; WL 153 IAW SRM 51-40-02-0G-0; DWG #146A8130.; [08] VERIFIED COMPLETION OF CUSTOMER CARD TTG8Q005DWQY

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