Service difficulty report · Stringer · Boeing 7377BD

Difficulty date
June 8, 2021
Submitted
July 2, 2021
Operation
Air carrier
Aircraft
N7721E
Make and model
Boeing 7377BD
Aircraft serial
34479
Aircraft time
50,877 hours, 26,372 cycles
Part
Stringer
Condition
Corroded
Location
Bs 312 S23l
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

E&E BAY STA 312+2 STR 23L WL 167 CORRODED. REMOVED CORROSION STRINGER 23 L IAW SRM 51-10-02-0G-0 ITEM 15 AND CHECK WITH 10 X MAGNIFYING GLASS IAW SRM 51-10-02-0G-0 ITEM 15. REMOVED 4 EA FASTENERS' ON STRINGER REPAIR AREA IAW SRM 51-40-02. VERIFIED STEPS 1 AND 2 ARE COMPLETE. VERIFIED STEPS 1 - 3. ORIGINAL .100'; REMAINING .087'; LOSS .013'. MEASURED IAW NDT PART 4 51-00-00 PROCEDURE 2. EVALUATED ALLOWABLE LIMITS ORIG.'T' 100 REMAINING .087 LOSS.013 FOUND OUT OF LIMITS IAW SRM 53-10-15-1A-1 FIG 108. VERIFIED STEP 6 IS COMPLETE. INSTALLED 4 EA FASTENERS' AT BS 312 STRINGER 23L IAW SRM 51-40-02 AND DWG 141A8131 REV.

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