Service difficulty report · None · Boeing 7378H4

Difficulty date
August 24, 2022
Submitted
September 26, 2022
Operation
Air carrier
Aircraft
N8649A
Make and model
Boeing 7378H4
Aircraft serial
42527
Aircraft time
27,113 hours, 12,631 cycles
Part
None
Condition
Corroded
Location
Fwd Cargo
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 FWD CARGO BAY BS500I LOWER BULKHEAD SUPPORT MULTIPLE AREAS RBL 20 TO LBL20 WL156 / [01] EVALUATED CORROSION AT ALL LOCATION OF BULKHEAD SUPPORT; FOUND DEEPEST LOCATION TO BE AT BS 500I RBL 19 WL 156; FOUND 0.020 REMOVED FROM ORIG 0.071 IN NUMEROUS 1'X1' AREAS; FOUND TO BE OUT OF LIMITS PER SRM 53-30-08-1A-1 USING DIAL DEPTH GAUGE ATS 2678 DUE 04/2023;[02] INSPECTED & VERIFIED CORRECTIVE ACTION ITEM 1.;[03] REMOVED FCB LOWER BULKHEAD SUPPORT BS=500I RBL20 TO LBL20 WL156 PER SRM 51-40-02-0G-0.;[04] LOCATED AND DRILLED NEW FWD CARGO BAY LOWER BULKHEAD SUPPORT AT BS 500I RBL 20 TO LBL 20 WL 156 IAW SRM 51-40-05-0G-0 AND 143A7902;[05] VERIFIED CORRECTIVE ACTION ITEM 4.;[06] OK TO INSTALL;[07] VERIFIED OK TO INSTALL;[08] INSTALLED NEW FWD CARGO BAY LOWER BULKHEAD SUPPORT AT BS 500I RBL 20 TO LBL 20 WL 156 IAW SRM 51-40-02-0G-0 AND DWG 143A7902;[09] VERIFIED CORRECTIVE ACTION STEP 8.;[10] VERIFIED MEASUREMENT TABLE AND TASK CARD COMPLETE.

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