# SDR DL72W992604

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N2812W
- Make and model: Boeing 727247
- Aircraft serial: 20868
- Engine: Pwa JT8D15
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Malfunctioned
- Location: Nr 1
- Part time: 68,005 hours
- Stage of operation: CL
- Nature of condition: R, J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DL72W992604

## Discrepancy

DURING T/O, NR 1 THROTTLE HAD TO BE ADVANCED BEYOND NORMAL POS TO ATTAIN T/O EPR, EGT AND N2 WERE IN CAUTION RANGE FOR NR 1 ENG & N1 WAS LOWER THAN NR 2 & NR 3 ENG.  DUCT PRESS ON LT SIDE WAS 30 PSI ON RT 68  PSI.  AFT F/A HEARD WHAT SOUNDED LIKE A BACKFIRE ON T/O.  DUMPED FUEL TO 21,000 LBS TO NEEDED WT.  ON SHORT FINAL HEARD POPPING SOUNDS AGAIN.  ENG REPLACED.

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