Service difficulty report · Seal · Boeing 777

Difficulty date
October 22, 2026
Submitted
October 22, 2026
Operation
General aviation
Aircraft
N446L
Make and model
Boeing 777
Engine
Ge GE90110B1
Engine time
37,844 hours, 6,364 cycles
Part
Seal
Part number
2505M72P01
Part serial
GWNOWP57
Condition
Cracked
Location
Hpt Rotor
Part time
37,844 hours, 6,364 cycles
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

SEAL-INTERSTAGE HPT ROTOR HAS CRACKS IN 4 LOCATIONS ON THE BAYONET TABS. THE CONDITION IS NOT SERVICEABLE OR REPAIRABLE. TO BE REPORTED IAW AMC-20-8A (J) ANY DEFECT IN A LIFE-CONTROLLED CRITICAL PART THAT CAUSES ITS RETIREMENT BEFORE THE COMPLETION OF ITS FULL-SERVICE LIFE.