# SDR AALA201704059002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2016
- Submitted: April 6, 2017
- Operation: Air carrier
- Aircraft: [N472AA](https://openairdocs.org/aircraft/N472AA), registered now
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49647
- Aircraft time: 79,065 hours, 42,222 cycles
- System (JASC): [7711 · Engine Pressure Ratio (EPR)](https://openairdocs.org/jasc/7711)
- Part: Transmitter
- Part number: LG80E1
- Part serial: H0835
- Condition: Faulty
- Location: Epr
- Part time: 27,921 hours, 14,165 cycles
- Stage of operation: TO
- How discovered: O
- Nature of condition: N
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201704059002

## Discrepancy

AIRCRAFT WAS GROUNDED. DURING TAKE OFF ROLL THE LEFT ENGINE EPR STAGNATED AT 1.64 - 1.68 LAGGING BEHIND THE RIGHT ENGINE. TAKE OFF ABORTED AT APPROXIMATELY 70 KNOTS. REMOVED AND REPLACED ENGINE PRESSURE RATIO INDICATOR (AALA20160525007)  IAW AMM 77-10-00 AND ENGINE PRESSURE RATIO TRANSMITTER IAW AMM 77-11-02.  OPERATIONAL CHECK GOOD.

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