Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
June 11, 2024
Submitted
July 18, 2024
Operation
Air carrier
Aircraft
N251WN
Make and model
Boeing 7377H4
Aircraft serial
32510
Aircraft time
59,313 hours, 35,831 cycles
Part
Stiffener
Condition
Cracked
Location
Zone 300
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

CRACK INSPAR RIB ON STIFFENER 2 AND STAB STA129.50 LT HORIZONTAL STAB 2024-392967<[01] TOOL USED IN STEP 3 AND 4 : EDDY CURRENT EQUIPMENT P/N NORTEC 500D S/ N 500X1693P030457 DUE DATE: 15-OCT-24.;[02] TOOL USED ON STEP 6: EDDY CURRENT EQUIPMENT PN: NORTEC500D; SN: N500X1693P030456 DUE DATE: 14 APR 25.;[03] PERFORMED PERMANENT REPAIR LOC ON INSPAR RIB STIFFENER 2 STA129.50 LT HORIZONTAL STAB IAW B737-700 SRM 55-10-09-2R-4 REPAIR 4; SRM 51-40-02 AND AMM 51-21-99. SEE INDIVIDUAL SIGN OFF BELOW.;[04] CORRECTED STEP 3.<BR>PERFORMED PERMANENT REPAIR LOC ON INSPAR RIB STIFFENER 2 STA129.50 LT HORIZONTAL STAB IAW B737-700 SRM 55-10-09-2R-4 REPAIR 4 AND SRM 51-40-02. SEE INDIVIDUAL SIGN OFF BELOW.;[05] PERFORMED PERMANENT REPAIR LOC ON INSPAR RIB STIFFENER 2 STA129.50 LT HORIZONTAL STAB IAW B737-700 SRM 55-10-09-2R-4 REPAIR 4 AND SRM 51-40-02. SEE INDIVIDUAL SIGN OFF BELOW.<BR>RII CERTIFIED

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