Service difficulty report · Seal · Boeing 7377Q8

Difficulty date
February 6, 2026
Submitted
February 10, 2026
Operation
Air carrier
Aircraft
N7877H
Make and model
Boeing 7377Q8
Aircraft serial
29359
Aircraft time
61,602 hours, 34,154 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 FORWARD UPPER SLIDING SEAL HAS A 4 INCH VERTICAL CRACK PARALLEL TO THE FORWARD TRACK. REMOVED AND REPLACED THE RT HORIZONTAL STAB FORWARD UPPER SLIDING SEAL IAW AMM 53-31-31.

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