Service difficulty report · Support · Boeing 7377H4

Difficulty date
July 14, 2021
Submitted
August 18, 2021
Operation
Air carrier
Aircraft
N444WN
Make and model
Boeing 7377H4
Aircraft serial
29839
Aircraft time
61,121 hours, 35,983 cycles
Part
Support
Condition
Corroded
Location
Bs 500d
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

FWD CARGO COMPARTMENT AFT BULKHEAD TO SIDEWALL SUPPORT HAS CORROSION BS 500D LBL 25 WL 156 ; / [01] CORROSION ON SUPPORT WAS FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS ARE GIVEN IN THE SRM; [02] VERIFIED NO LIMITS IN THE SRM FOR AFT BULKHEAD SIDEWALL SUPPORT; [03] REMOVED FWD CARGO AFT BULKHEAD TO SIDEWALL SUPPORT BS 500D LBL 25 WL 156 PER SRM 51-40-02-0G-0; [04] VERIFIED REMOVED FWD CARGO AFT BULKHEAD TO SIDEWALL SUPPORT BS 500D LBL 25 WL 156 PER SRM 51-40-02-0G-0; [05] LOCATED DRILLED AND COUNTERSUNK NEW FWD CARGO COMPARTMENT AFT BULKHEAD TO SIDEWALL SUPPORT AT BS 500D LBL 25 WL 156 IAW SRM 51-40-05-0G-0 SRM 51-40-08-0G-0 AND BOEING DWG 143A9481; [06] VERIFIED LOCATE; DRILL AND COUNTERSINK OF NEW FCB AFT BULKHEAD TO SIDEWALL SUPPORT AT BS 500D LBL 25 IAW SRM 51-40-05-0G-0; SRM 51-40-08-0G-0 AND BOEING DWG 143A9481.; [07] OK TO INSTALL SUPPORT; [08] OK TO INSTALL SUPPORT; [09] INSTALLED SUPPORT PER SRM 51-40-02-0G-0 AND BOEING DWG 143A9481; [10] VERIFIED INSTALLED SUPPORT PER SRM 51-40-02-0G-0 AND BOEING DWG 143A9481; [11] INSTALLED SUPPORT PER SRM 51-40-02-0G-0 AND BOEING DWG 143A9481

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