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
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

CORROSION ON FWD CARGO BAY AFT BULKHEAD TO SIDEWALL SUPPORT AT BS 500D RBL 25 WL 156 ; / [01] REMOVED CORROSION ON FWD CARGO BAY AFT BULKHEAD TO SIDEWALL SUPPORT AT BS 500D RBL25 WL156 MEASURES ; L=2.5' X W=1.5' X D=0.026' MAX. MAT. LOSS IS 0.026' REMAINING THICKNESS 0.045' FOUND TO BE OUT OF LIMITS REWORKED AREA IAW SRM 53-30-08-1A-1; PARAG 4.A (2) DETAIL D USED TOOL ID:ATS1671; S/N:65093024. DUE DATE:01/2022.; [02] REMOVED CORROSION ON FWD CARGO BAY AFT BULKHEAD TO SIDEWALL SUPPORT AT BS 500D RBL25 WL156 MEASURES ; L=2.5' X W=1.5' X D=0.026' MAX. MAT. LOSS IS 0.026' REMAINING THICKNESS 0.045' FOUND TO BE OUT OF LIMITS REWORKED AREA IAW SRM 53-30-08-1A-1; PARAG 4.A (2) DETAIL D USED TOOL ID:ATS1671; S/N:65093024. DUE DATE:01/2022.; [03] INSPECTED AND VERIFIED REMOVED CORROSION ON FWD CARGO BAY AFT BULKHEAD TO SIDEWALL SUPPORT AT BS 500D RBL25 WL156 MEASURES ; L=2.5' X W=1.5' X D=0.026' MAX. MAT. LOSS IS 0.026' REMAINING THICKNESS 0.045' FOUND TO BE OUT OF LIMITS REWORKED AREA IAW SRM 53-30-08-1A-1; PARAG 4.A (2) DETAIL D; [04] LOCATED AND DRILLED AFT BULKHEAD TO SIDEWALL SUPPORT P/N 143A9485-34 IAW SRM 51-40-05 AND DWG#143A9481.; [05] AFT BULKHEAD SUPPORT WILL BE INSTALLED WITH THE CUSTOMER CARD TTG8Q004CVKC STEP#46; [06] VERIFIED STEPS 4 AND 5; [09] INSTALLED ON FWD CARGO BAY AFT BULKHEAD TO SIDEWALL SUPPORT P/N 143A9485-34; BTW BS 500D RBL 25 WL;156-WL 195.95 IAW SRM 51-40-02;DWG#143A7902;

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