# SDR ASAA2021030134217

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2021
- Submitted: March 3, 2021
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 46,422 hours, 13,863 cycles
- Engine: Cfmint CFM567B27
- Engine time: 55,288 hours, 16,547 cycles
- System (JASC): [7220 · Turbine Engine Air Inlet Section](https://openairdocs.org/jasc/7220)
- Part: Blade
- Part number: CFM567B27
- Part serial: 893814
- Condition: Cracked
- Location: Lt Engine
- Part time: 55,288 hours, 16,547 cycles
- Stage of operation: IN
- How discovered: B
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021030134217

## Discrepancy

REF T/C # 78472022 SPECIAL DETAILED INSPECTION (SDI) (BOROSCOPE) - CFM56 - 7 ENG HPT BLADES. #1 ENG . S/N 893814. FOUND INTERSECTING CRACK LPT NGV STG - 1 ALONG W/3 FULL CRACKS IN FULLSET, 1 NGV W/HOLE LESS THAN .039 SQ. INCH ". GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE ESN # 893814. TRANSFERRED TO SHOP W/O #1865895.

---
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.