SDR SWAA2022022879998

Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date: December 1, 2018
Submitted: March 1, 2022
Operation: Air carrier
Aircraft: N744SW
Make and model: Boeing 7377H4
Aircraft serial: 29490
Aircraft time: 69,094 hours, 41,040 cycles
System (JASC): 5310 · Fuselage Main, Structure
Part: Stiffener
Condition: Corroded
Location: Empennage
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 EXTERNAL STIFFENER STA 1037; BETWEEN STR 2L-2R UNDER VERTICAL STAB / REMOVED CORROSION ON EXTERNAL STIFFENER AFTER EVALUATION FOUND 100% MATERIAL LOSS AND WAS FOUND TO BE OUT OF LIMITS IAW SRM 51-10-02-0G-0. REMOVED STIFFENER IAW SRM 51-40-02-0G-0. FABRICATED NEW STIFFENER LOT# 5078820-1 PO# 725807 IAW SRM 51-30-01-0G-0 AND BOEING DWG 69-69859. INSTALLED NEW STIFFENER IAW SRM 51-40-02-0G-0 AND BOEING DWG 148A3110. ON EXTERNAL STIFFENER STA 1037 BETWEEN STR 2L-2R 57042C 23JAN19

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