Service difficulty report · None · Boeing 7377H4

Difficulty date
August 25, 2022
Submitted
September 26, 2022
Operation
Air carrier
Aircraft
N496WN
Make and model
Boeing 7377H4
Aircraft serial
32478
Aircraft time
59,797 hours, 35,569 cycles
Part
None
Condition
Corroded
Location
Fuselage
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* FOUND AT AFT WET AREA LEFT INNER CHORD BETWEEN BSTA 947.5 AND BSTA 986.5 / [01] INSTALLED EWIS PROTECTION AT AFT WET AREA LEFT INNER CHORD BETWEEN BSTA.947.5 AND BSTA. 986.5 REFERENCE B737-700 AMM 20-60-07-913-801;[02] REMOVED INNER CHORD AT AFT WET AREA STA. 897 TO STA. 998 REFERENCE B 737-700 SRM 51-40-02-0G-0;[03] LATE ENTRY:PARTIALLY REMOVED CORROSION AT AFT WET AREA LEFT INNER CHORD BETWEEN STA 947.5 AND STA 986.5. CORROSION FOUND BEYOND LIMITS. REF 53-70-15-1A-1;[04] VERIFIED INSTALLED EWIS PROTECTION AT AFT WET AREA LEFT INNER CHORD BETWEEN BSTA.947.5 AND BSTA. 986.5;[05] VERIFIED STEP 3 PARTIALLY REMOVED CORROSION AT AFT WET AREA LEFT INNER CHORD BETWEEN STA 947.5 AND STA 986.5. CORROSION FOUND BEYOND LIMITS;[06] VERIFIED STEP 2 REMOVED INNER CHORD AT AFT WET AREA STA. 897 TO STA. 998;[07] LOCATED AND DRILL NEW INNER CHORD REFERENCE B737-700 SRM 51-40-020-0G-0;[08] VERIFIED STEP 7 LOCATED AND DRILL NEW INNER CHORD;[09] OK TO INSTALL NEW INNER CHORD AT AFT WET AREA FROM STA 897 TO STA. 998;[10] INSTALLED NEW INNER CHORD AT AFT WET AREA FROM STA. 897 TO STA. 998 REFERENCE B737-700 SRM 51-40-02-0G-0;[11] VERIFIED STEP 10 INSTALLED NEW INNER CHORD AT AFT WET AREA FROM STA. 897 TO STA. 998;[12] REMOVED EWIS PROTECTION AT AFT WET AREA BETWEEN BSTA 947.5 AND 986.5 REFERENCE AMM 20-60-07-913-801;[13] VERIFIED STEP 12 REMOVED EWIS PROTECTION AT AFT WET AREA BETWEEN BSTA 947.5 AND 986.5

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