# SDR AALA20161231002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 30, 2016
- Submitted: January 3, 2017
- Operation: Air carrier
- Aircraft: N175AN
- Make and model: Boeing 757223
- Aircraft serial: 32394
- Aircraft time: 48,996 hours, 14,085 cycles
- System (JASC): [7714 · Engine RPM Indicating System](https://openairdocs.org/jasc/7714)
- Part: Tach Generator
- Part number: 3301KGAMS1
- Part serial: SP9845
- Condition: Faulty
- Location: Rt Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20161231002

## Discrepancy

AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. MIA-LPB FLIGHT DIVERTED TO PTY ACCOUNT RIGHT ENGINE N3 TACHOMETER AND PRESSURIZATION. LANDING UNEVENTFUL. REMOVED AND REPLACED HIGH PRESSURE N3 TACHOMETER GENERATOR IAW AMM 77-12-02. OPERATIONAL CHECK GOOD.

---
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.