# SDR AALA20160525007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2016
- Submitted: May 27, 2016
- 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
- Engine: Pwa JT8D217C
- System (JASC): [7711 · Engine Pressure Ratio (EPR)](https://openairdocs.org/jasc/7711)
- Part: Indicator
- Part number: 2047021
- Part serial: 1276
- Condition: Faulty
- Location: Epr
- Part time: 30,174 hours, 14,549 cycles
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20160525007

## Discrepancy

DURING TAKEOFF ROLL THE LT ENG EPR STAGNATED AT 1.64 - 1.68, LAGGING BEHIND THE RT ENG.  TAKEOFF ABORTED AT APPROX 70 KNOTS.  REMOVED AND REPLACED ENGINE PRESSURE RATIO INDICATOR IAW AMM 77-10-00 AND ENGINE PRESSURE RATIO TRANSMITTER IAW AMM 77-11-02.  OPERATIONAL CHECK GOOD.  AIRCRAFT WAS GROUNDED.

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