# SDR AMTA200700724

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2007
- Submitted: January 2, 2008
- Operation: Air carrier
- Aircraft: N550TZ
- Make and model: Boeing 757-33N
- Registry model: [Boeing 757-33N](https://openairdocs.org/model/boeing-757-33n) (OpenAirDocs)
- Aircraft serial: 32584
- Engine: Rroyce RB211535E4
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Relay
- Condition: Failed
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AMTA200700724

## Discrepancy

APU FAILED TO START ON THE GROUND.  REMOVED AND REPLACED APU RELAY IAW FIMM 49-11-00, OPS CHECK NORMAL.  (K)

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