Service difficulty report · Seal · Boeing 7377H4

Difficulty date
September 23, 2026
Submitted
September 29, 2026
Operation
Air carrier
Aircraft
N930WN
Make and model
Boeing 7377H4
Aircraft serial
36636
Aircraft time
56,242 hours, 34,361 cycles
Part
Seal
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

RIGHT HORIZONTAL STAB, FWD UPPER SLIDING SEAL WAS CRACKED VERTICALLY ON THE FWD AND AFT SIDES, PARALLEL TO SEAL TRACK. REMOVED AND REPLACED THE RT HORIZONTAL STAB SLIDING SEAL IAW AMM 53-31-31.

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