Service difficulty report · Floor Panel · Boeing 7377H4

Difficulty date
February 10, 2023
Submitted
March 13, 2023
Operation
Air carrier
Aircraft
N277WN
Make and model
Boeing 7377H4
Aircraft serial
32531
Aircraft time
51,901 hours, 31,206 cycles
Part
Floor Panel
Condition
Corroded
Location
Zn 100 Fus Lower
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

MAIN CABIN FWD WET AREA CORROSION AT INNER CHORD LBL 55' BETWEEN STA 294.5-312<[01] REMOVED CORROSION AT INNER CHORD LBL 55' ; BETWEEN STA 294.5 - 312 AS PER SRM 51-10-02.FAUND A CRACK AT STA 303;LBL 55'.;[02] FOUND OUT OF LIMITS; NO CRACK PERMITTED ACCROSS THE INNER CHORD; AS PER SRM 53-10-15-1A-1.;[03] VERIFIED STEPS 1 AND 2;[04] PARTIALLY REMOVED FASTENERS OF INNER CHORD LBL 55 STA. 360; AS PER SRM 51-40-02.;[05] REMOVED INNER CHORD AT MAIN CABIN LBL 55 BETWEEN STA. 380-277 AS PER SRM 51-40-02.;[06] LOCATED AND DRILLED NEW MAIN CABIN FWD WET AREA INNER CHORD LBL 55'' BETWEEN STA 294.5 - 312 REF SRM 51-40-05-0G-0 AND DWG #141A8110;

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