Service difficulty report · Support · Boeing 7378H4

Difficulty date
February 17, 2022
Submitted
March 3, 2022
Operation
Air carrier
Aircraft
N8681M
Make and model
Boeing 7378H4
Aircraft serial
36904
Aircraft time
20,561 hours, 9,510 cycles
Part
Support
Part number
146A750251
Condition
Corroded
Location
Fwd Cargo Bay
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 BAY HAS CORROSION ON LOWER BULKHEAD SUPPORT BS 500I RBL13 WL156 / [01] EVALUATED CORROSION; BS 500I RBL 13 WL 156; FOUND 0.026 REMOVED FROM ORIG 0.071 IN 1'X1' AREA FOUND TO BE OUT OF LIMITS PER SRM 53-30-08-1A-1 USING DIAL DEPTH GAUGE ATS 2473;[02] VERIFIED CORRECTIVE ACTION 1. OUT OF LIMITS;[03] REMOVED BULKHEAD SUPPORT BS 500I RBL25 TO LBL25 WL156 PER SRM 51-40-02-0G-0;[04] LOCATED ; DRILLED; AND DEBURRED NEW FCB LOWER BULKHEAD SUPPORT BS 500I; RBL 25-LBL 25; WL 156 IAW SRM 51-40-05-0G-0; DWG# 143A7902. OK TO INSTALL LOWER BULKHEAD SUPPORT.;[05] VERIFIED STEP 3 AND 4. OK TO INSTALL.;[06] INSTALLED NEW FCB LOWER BULKHEAD SUPPORT BS 500I; RBL 25-LBL 25; WL 156 IAW SRM 51-40-02-0G-0; DWG# 143A7902.;[07] VERIFIED CORRECTIVE ACTION STEP 6.;[08] COMPLETE;[09] COMPLETE

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