What was found
DURING BOROSCOPE INSPECTION OF THE NR 3 ENGINE FOUND SEVERAL SECOND STAGE HPT BLADES DAMAGED, EXCEEDING LIMITS, REMOVED ENGINE REQUIRED IAW AMM 72-00-00 TABLE 615, INSTALLED SERVICEABLE NR 3 ENGINE IAW 71-00-9901-03.
- Difficulty date
- April 16, 2017
- Submitted
- April 17, 2017
- Operation
- Air carrier
- Aircraft
- N668US
- Make and model
- Boeing 747451
- Aircraft serial
- 24223
- Aircraft time
- 112,488 hours, 13,830 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 7250 · Turbine Section
- Part
- Blade
- Condition
- Damaged
- Location
- Engine
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.