Service difficulty report · Support · Boeing 7377BD

Difficulty date
April 18, 2022
Submitted
May 11, 2022
Operation
Air carrier
Aircraft
N7736A
Make and model
Boeing 7377BD
Aircraft serial
35109
Aircraft time
50,096 hours, 25,534 cycles
Part
Support
Part number
143A948535
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

CORROSION ON FWD CARGO BAY AFT LOWER BULKHEAD SUPPORT AT BS 500D LBL 22-RBL 22. / [01] SRM 53-30-08-0I-1 FOR IDENTIFICATION AND SRM 53-30-08-1A-1 FOR ALLOWABLE DAMAGE; ARE APPLICABLE;[02] REMOVED CORROSION ON FWD CARGO BAY AFT LOWER BULKHEAD SUPPORT AT BS 500D LBL 22 RBL 22; IAW SRM 51-10-02 PARAGRAPH #15;EVALUATED ALL REWORKED AREA; THE DEEPEST AREA BS 500D LBL 22; DIMENSION:L=3.' X W=2.' ;DEPTH=0.021'; ORIGINAL THICKNESS 0.071' ;REMAINING THICKNESS 0.050' FOUND TO BE OUT O FALLOWABLE DAMAGE LIMITS;IAW SRM 53-30-08-1A-1 PARAGRAPH# 4 FIG#103;DEATIL 'D' TOOL USED CALIPER ID:ATS1317.;[03] VERIFIED SRM APPLICABILITY; REWORK OUT OF LIMITS AND MEASUREMENT TABLE ACCURACY.;[04] LOCATED AND DRILLED ON FWD CARGO BAY AFT NEW LOWER BULKHEAD SUPPORT AT BS 500D LBL 22- RBL 22; P/N 143A9485-35 ;LOT# 1479379-1 PO# 853024/1 IAW SRM 51-40-05 AND DWG 143A7902 REV:-;OK TO INSTALL.;[05] UPDATED PART USAGE.;[06] VERIFIED CORRECTIVE ACTION 4.;[07] OK TO INSTALL FWD CARGO BAY AFT LOWER BULKHEAD SUPPORT AT BS 500D LBL 22- RBL 22;[08] VERIFIED OK TO INSTALL FCB LOWER BULKHEAD SUPPORT AT BS 500D LBL 22- RBL 22.;[09] INSTALLED FCB AFT BULKHEAD LOWER SUPPORT ANGLE AT BS 500D LBL 25- RBL 25 IAW SRM 51-40-02-0G-0 AND DWG# 143A9481.;[10] VERIFIED CORRECTIVE ACTION #9.

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