SDR SWAA2023011984352

Service difficulty report · Threshold · Boeing 7377H4

Difficulty date: December 21, 2022
Submitted: January 19, 2023
Operation: Air carrier
Aircraft: N272WN
Make and model: Boeing 7377H4
Aircraft serial: 32527
Aircraft time: 52,973 hours, 31,748 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Threshold
Condition: Corroded
Location: Bs 787-807
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 AFT CARGO BAY THRESHOLD, RBL 22, BS 787+9, RBL 23, BS 787+13, RBL 26, BS 787+13, RBL 26, BS 807+4, RBL 26, BS 807+14, RBL 26, BS 807+15, AND RBL 26, BS 807+18. REMOVED CORROSION ON THE THRESHOLD WEB, DAMAGE EXCEED 10% OF ORIGINAL THICKNESS, AND FOUND TO BE OUT OF LIMIT IAW SRM 53-60-15-1A-1. LOCATED AND DRILLED A NEW THRESHOLD IAW SRM 51-40-05, AND DWG 146A8123, REV C.

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