Service difficulty report · Rib · Boeing 7377H4

Difficulty date
December 9, 2025
Submitted
January 5, 2026
Operation
Air carrier
Aircraft
N453WN
Make and model
Boeing 7377H4
Aircraft serial
29847
Aircraft time
70,040 hours, 41,687 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 INSPAR RIB 129.50 LOCATED AT 27 INCHES OF FRONT SPAR AT LT HORIZONTAL STAB. PERFORMED PERMANENT REPAIR LOCATED ON INSPAR RIB STAB BS 129.50 AND 17 INCHES OF REAR SPAR AT LT HORIZONTAL STABILIZER. IAW SRM 51-40-02 SRM 55-10-09-2R-5. REPAIR 5.

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