Service difficulty report · Rail · Boeing 7377H4

Difficulty date
May 2, 2025
Submitted
June 6, 2025
Operation
Air carrier
Aircraft
N222WN
Make and model
Boeing 7377H4
Aircraft serial
34290
Aircraft time
64,101 hours, 38,519 cycles
Part
Rail
Condition
Corroded
Location
Zone 500
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 ON RAIL NUT PLATES LOCATED OFSS288 INTERNAL CAVITY LEADING EDGE AT LT WING 2025-291144 <[01]. REMOVED RAIL NUT PLATES LOCATED OFSS288 INTERNAL CAVITY LEADING EDGE AT LT WING IAW B737-700 SRM 51-40-02; DUE TO NOT FOUND ALLOWABLE DAMAGE ON SRM 57-41-02-1A-2 MUST BE REPLACED AND PERFORMED VISUAL INSPECTION AND NOT FOUND ADDITIONAL DAMAGE AFTER REMOVAL PART. REPLACED RAIL NUT PLATES LOCATED OFSS288 INTERNAL CAVITY LEADING EDGE AT LT WING IAW B737-700 SRM 51-10-02 ITEM 9 DWG DWG 112A4402 SHEET:13 REV: - MEASURE OF CORROSION L: 0.745 W: 0.080? D: 0.008? TOOL USED: DIGITAL CALIPER P/N:500-197-30 S/N: A23272233 DUE DATE: 07-JAN-26; [02] REMOVED RAIL NUT PLATES LOCATED OFSS288 INTERNAL CAVITY LEADING EDGE AT LT WING IAW B737-700 SRM 51-40-02; DUE TO NOT FOUND ALLOWABLE DAMAGE ON SRM 57-41-02-1A-2 MUST BE REPLACED AND PERFORMED VISUAL INSPECTION AND NOT FOUND ADDITIONAL DAMAGE AFTER REMOVAL PART. REPLACED RAIL NUT PLATES LOCATED OFSS288 INTERNAL CAVITY LEADING EDGE AT LT WING IAW B737-700 SRM 51-10-02 ITEM 9 DWG DWG 112A4402 SHEET:13 REV: - MEASURE OF CORROSION L: 0.745 W: 0.080? D: 0.008 TOOL USED: DIGITAL CALIPER P/N:500-197-30 S/N: A23272233 DUE DATE: 07-JAN-26.

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