Service difficulty report · Seal · Boeing 7378

Difficulty date
August 20, 2026
Submitted
August 25, 2026
Operation
Air carrier
Aircraft
N8947Q
Make and model
Boeing 7378
Aircraft serial
68631
Aircraft time
4,900 hours, 2,515 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

LEFT HORIZONTAL STAB FWD UPPER SLIDING SEAL HAS A 2.5 VERTICAL CRACK RUNNING PARALLEL TO FWD SEAL TRACK. REMOVED AND REPLACED LT HORIZONTAL STAB FWD UPPER SLIDING SEAL IAW AMM 53-31-31.

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