# SDR ASAA2015090612959

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2015
- Submitted: September 10, 2015
- Operation: Air carrier
- Aircraft: [N565AS](https://openairdocs.org/aircraft/N565AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35181
- Aircraft time: 33,608 hours, 10,249 cycles
- System (JASC): [7710 · Power Indicating System](https://openairdocs.org/jasc/7710)
- Part: Fault Code
- Condition: Activated
- Location: Nr 1 Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015090612959

## Discrepancy

MAINTENANCE MESSAGE 77-21171, N1 SIGNAL IS OUT OF RANGE FOR ENGINE NR 1.  THIS IS A LONG TERM FAULT WHICH MUST BE CORRECTED WITHIN 450 FLIGHT HOURS.  ACFT GROUNDED. ON DEFERRAL.

---
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.