Service difficulty report · Seal

Difficulty date
April 2, 2025
Submitted
April 2, 2025
Operation
General aviation
Aircraft
N446L
Engine
Ge GE90115B
Engine time
30,925 hours, 4,422 cycles
Part
Seal
Part number
2505M72P01
Part serial
NCU61244
Condition
Worn
Location
Hpt
Part time
30,925 hours, 4,422 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

DURING INCOMING INSPECTION AT GE WALES, A DEFECT ON THE SEAL-INTERSTAGE HPT ROTOR (HPTR) HAS BEEN NOTED. THE HPTR INTERSTAGE SEAL EXHIBITS 1 AREA OF WEAR (CONSISTING OF 5 INDIVIDUAL SPOTS OF WEAR, GROUPED INTO 4 LOCATIONS) TO THE FILLET BETWEEN THE STG 2 DISK INTERFACE/AFT RABBET, TO A MAXIMUM DEPTH OF 0.004 INCH. THIS IS A KNOWN SERVICE RUN CONDITION. DR #02158237 REJECTED BY THE OEM. TO BE REPORTED IN LINE WITH MANDATORY REPORTING REQUIREMENT 145 AMC 20-8A (J) ANY DEFECT IN A LIFE-CONTROLLED CRITICAL PART THAT CAUSES ITS RETIREMENT BEFORE THE COMPLETION OF ITS FULL SERVICE LIFE.