# SDR AALA201706099037

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 2017
- Submitted: June 10, 2017
- Operation: Air carrier
- Aircraft: [N9626F](https://openairdocs.org/aircraft/N9626F), registered now
- Make and model: Doug MD 83
- Registry model: [Doug MD 83](https://openairdocs.org/model/mcdonnell-douglas-md-83) (OpenAirDocs)
- Aircraft serial: 53596
- Aircraft time: 52,167 hours, 25,477 cycles
- System (JASC): [7711 · Engine Pressure Ratio (EPR)](https://openairdocs.org/jasc/7711)
- Part: B-Nut
- Condition: Loose
- Location: Lt Engine
- Stage of operation: TO
- How discovered: O
- Nature of condition: R
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201706099037

## Discrepancy

THE AIRCRAFT WAS GROUNDED. LEFT ENGINE SLOW TO ACCELERATE ON TAKE OFF. THE N1 EVENTUALLY ACHIEVED 90%, BUT EPR REMAINED AT 1.20% AND NEVER REACHED 1.92% TAKE OFF POWER. TAKE OFF ABORTED BELOW 80 KNOTS, BRAKE TEMP NORMAL. EXAMINED LEFT ENGINE EPR SYSTEM IAW AMM  77-11-01. DISCOVERED LOSE CONNECTION ON PT7 MANIFOLD AT 9 O’CLOCK. SECURED B NUT. NO LEAKS NOTED. ACCOMPLISHED TAKEOFF POWER ASSURANCE CHECK IAW AMM 71-00-00. CHECKS GOOD. OK FOR SVC.

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