Service difficulty report · Rib · Boeing 7377H4

Difficulty date
March 25, 2025
Submitted
April 30, 2025
Operation
Air carrier
Aircraft
N221WN
Make and model
Boeing 7377H4
Aircraft serial
34259
Aircraft time
65,130 hours, 38,662 cycles
Part
Rib
Condition
Cracked
Location
Zone 300
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

CRACK ON INSPAR RIB LOCATED STAB STA 120.30 AND 28 INCHES FROM FRONT SPAR LT HORIZONTAL STAB 2025-224224<[01] TOOL USED IN STEP 5: ET EQUIPMENT; P/N: NORTEC 600D; S/N: 200053402 DUE DATE: 16-SEP-25. ELECTRONIC CALIPER P/N: 500-196-30 S/N: A23048253 DUE DATE: 05-JUN-25.;[02] TOOL USED IN STEP 6: ET EQUIPMENT; P/N: NORTEC 600D; S/N: 200053402 DUE DATE: 16-SEP-25;[03] TOOL USED ON STEP 8 AND 9: EDDY CURRENT EQUIPMENT P/N: NORTEC 600D S/N: 210138103 DUE DATE: 28-JAN-26;[04] REPAIRED INSPAR RIB LOCATED STAB STA 120.30 AND 28 INCHES FROM FRONT SPAR LT HORIZONTAL STAB IAW SRM B737-700 55-10-09-2R-5 REPAIR 5; SEE INDIVIDUAL SIGNOFF BELOW.;[05] TASK COMPLETED ; RII <BR>SEE INDIVIDUAL SIGNOFF BELOW.

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