# SDR DALA2017041703127

- Type: Service difficulty report (as reported; unverified)
- 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](https://openairdocs.org/jasc/7250)
- Part: Blade
- Condition: Damaged
- Location: Engine
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2017041703127

## Discrepancy

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.