# SDR DL76L061020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 2, 2006
- Submitted: December 13, 2006
- Operation: Air carrier
- Aircraft: [N178DN](https://openairdocs.org/aircraft/N178DN), registered now
- Make and model: Boeing 767332
- Aircraft serial: 25143
- Aircraft time: 74,315 hours, 11,417 cycles
- Engine: Pwa PW4060
- Engine time: 19,186 hours, 28,802 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Engine
- Part serial: P1933
- Condition: Weak
- Location: Apu
- Part time: 19,186 hours, 28,802 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DL76L061020

## Discrepancy

APU WEAK ON ENG START.  ONLY PROVIDED 22 PERCENT MAX MOTORING AFTER 50 SECONDS.  TRIED SURGE CONTROL VALVE NO HELP.  REPLACED APU.

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