Service difficulty report · Support · Boeing 73776N

Difficulty date
July 15, 2021
Submitted
August 10, 2021
Operation
Air carrier
Aircraft
N7723E
Make and model
Boeing 73776N
Aircraft serial
32670
Aircraft time
48,099 hours, 24,239 cycles
Part
Support
Part number
143A948535
Condition
Corroded
Location
Bs 500d
Stage of operation
IN
How discovered
V
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 BULKHEAD TO FLOOR SUPPORT AT BS 500D RBL 13 WL 156 ; / [01] CORROSIONON FWD CARGO BAY AFT BULKHEAD TO FLOOR AT BS 500D RBL13 WL156 MEASURES ; L=3'. X W=1.5' THE AREA SHOWS THE 100% OF MATERIAL THICKNESS LOSS; [02] CORROSIONON FWD CARGO BAY AFT BULKHEAD TO FLOOR AT BS 500D RBL13 WL156 MEASURES ; L=3'. X W=1.5' THE AREA SHOWS THE 100% OF MATERIAL THICKNESS LOSS; [03] CORROSIONON FWD CARGO BAY AFT BULKHEAD TO FLOOR AT BS 500D RBL13 WL156 MEASURES ; L=3'. X W=1.5' THE AREA SHOWS THE 100% OF MATERIAL THICKNESS LOSS MUST BE REPLACED IAW SRM 51-10-02 STEP 9.C; [04] VERIFIED CORROSIONON FWD CARGO BAY AFT BULKHEAD TO FLOOR AT BS 500D RBL13 WL156 MEASURES ; L=3'. X W=1.5' THE AREA SHOWS THE 100% OF MATERIAL THICKNESS LOSS MUST BE REPLACED IAW SRM 51-10-02 STEP 9.C; [05] LOCATED AND DRILLED AFT BULKHEAD TO FLOOR SUPPORT P/N 143A9485-35; ITEM 7530142; IAW. SRM 51-40-05; DWG# 143A9481.; [06] INSPECTED ACTION 5; [07] OK TO INSTALL .; [08] OK TO INSTALL.; [09] INSTALLED FCB AFT BULKHEAD TO FLOOR SUPPORT BS 500D RBL-24 TO LBL-24 WL-156 IAW SRM 51-40-02-0G-0 AND DWG#143A7902; [10] VERIFIED INSTALLATION OF FCB AFT BULKHEAD TO FLOOR SUPPORT BS 500D RBL-24 TO LBL-24 WL-156 IAW SRM 51-40-02-0G-0 AND DWG#143A7902; [11] ADDED PART REMOVAL IN PART REQUIREMENTS; [12] VERIFIED CARD COMPLETE; [13] UPDATED MEASUREMENTS

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