SDR SWAA2020080700166

Service difficulty report · Web · Boeing 7377H4

Difficulty date: July 9, 2020
Submitted: August 7, 2020
Operation: Air carrier
Aircraft: N720WN
Make and model: Boeing 7377H4
Aircraft serial: 27854
Aircraft time: 74,929 hours, 44,674 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Web
Condition: Corroded
Location: Cargo Threshold
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 FORWARD CARGO BAY DOOR CUTOUT THRESHOLD SUB WEB AT BS 440 - 494, WL 154, RBL 25. REMOVED FCB SUB THRESHOLD WEB IAW SRM 51-40-02. OUT OF LIMITS IAW SRM 53-30-15-1A-1. ORIG; MAT'L THICKNESS .045. REMAINING THICKNESS .033 AFTER CORROSION REMOVAL IAW SRM 51-10-02. LOCATED, DRILLED, AND INSTALLED A NEW WEB IAW SRM 51-40-02, DWG. 143A8330, AND DWG 143A8120.

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