SDR SWAA2020032442794

Service difficulty report · Doubler · Boeing 7377AD

Difficulty date: February 28, 2020
Submitted: March 24, 2020
Operation: Air carrier
Aircraft: N798SW
Make and model: Boeing 7377AD
Aircraft serial: 28436
Aircraft time: 69,451 hours, 41,534 cycles
System (JASC): 5330 · Fuselage Main, Plate/Skin
Part: Doubler
Part number: 143A3230
Condition: Corroded
Location: Fuselage
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*** E/E BAY INTERNAL SKIN AT BILGE VENT BELOW MAIN BATTERY, STA 380+2, BL 0 CORROSION ON E&E BAY INTERNAL DOUBLER IN BILGE BS-380+2. BL-0 FOUND TO BE OUT OF LIMITS PER SRM - 53-30-01-1A-1. FABRICATED NEW DOUBLER FROM 2024-T3 .050" LOT # 1425168-1 IAW DWG - 143A3230, SRM 51-40-05. INSTALLED PER DWG - 143A3230 & SRM 51-40-02.

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