What was found
THROUGH THE INSPECTION PROCESS THE HPT FORWARD SEAL HAS BEEN FOUND WITH MICRO CRACKING, OBSERVED UNDER WHITE LIGHTX10. CRACKING IN AFT TRANSITION SEAL NECK AREA - 360°. THE PART IS AN LLP AND HAS BEEN REMOVED FROM SERVICE EARLY.
- Difficulty date
- November 20, 2019
- Submitted
- December 9, 2019
- Operation
- General aviation
- Aircraft
- N466L
- Make and model
- Boeing 777*
- Engine
- Ge GE90115B
- Engine time
- 58,942 hours, 7,381 cycles
- System (JASC)
- 7250 · Turbine Section
- Part
- Seal
- Part number
- 2517M71P01
- Part serial
- NCE488KM
- Condition
- Cracked
- Location
- Engine
- Part time
- 28,280 hours, 3,599 cycles
- Component
- Engine · Ge · GE90115B
- Component part number
- GE90115B
- Stage of operation
- IN
- How discovered
- D
- Nature of condition
- P
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.