Service difficulty report · Skin · Boeing 7377H4

Difficulty date
August 22, 2023
Submitted
September 19, 2023
Operation
Air carrier
Aircraft
N904WN
Make and model
Boeing 7377H4
Aircraft serial
36616
Aircraft time
51,012 hours, 30,668 cycles
Part
Skin
Part number
UNKNOWN
Condition
Corroded
Location
Zn 200 Fus Top
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 OUTER FUSELAGE CROWN SKIN COMMON TO FASTENER ROWS FROM STATION 1016 TO 1016+17; STRINGER 0; STRINGER S-1R; STRINGER S-1L; AND BL 12 LEFT AND RIGHT. CORRECTION TO FAULT NAME LOCATION SHOULD BE STR 1 AND STR 2L AND STR 2R LBL 12 AND RBL 12<[01] VERIFIED CORRECTIVE ACTION STEP 1; 2;3.;[02] VERIFIED STEP 9.1;[03] REMOVED CORROSION AROUND 47 FASTENER HOLES BS 1016 TO BS 1016+22; STR 1; STR 2R; STR 2L; RBL12; AND LBL12. REMOVED .5'X.5'X.006' LOWEST READING. ORIGINAL THICKNESS IS .080'; REMOVED AND REPLACED FASTENERS IN REWORKED AREA; ALL PER SRM 53-00-01-1A-1; SRM 53-80-01-0L-1; AND EA 23-153-02671. ' AS PER EA 23-153-02671; THE REWORK IS ACCEPTABLE AS A CONTINUE-IN-SERVICE CONDITION WITHOUT REPETITIVE INSPECTIONS AND NO TERMINATING ACTION REQUIREMENTS.';[04] VERIFIED CORRECTIVE ACTION #3

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