# SDR ASAA2022072539229

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2022
- Submitted: July 28, 2022
- Operation: Air carrier
- Aircraft: [N533AS](https://openairdocs.org/aircraft/N533AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35201
- Aircraft time: 41,937 hours, 12,110 cycles
- System (JASC): [4930 · APU Engine Fuel and Control](https://openairdocs.org/jasc/4930)
- Part: Fcu
- Part number: 4419215
- Part serial: CUC10166
- Condition: Faulty
- Location: Apu Compartment
- Part time: 14,509 hours, 28,802 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022072539229

## Discrepancy

APU FAILED START AT 380, 380, 350. ALL START ATTEMPTS RESULTED IN A FAULT LIGHT. APU PEAKED AT EGT 1000 DEGREES C ON GAUGE. FAULT LIGHT EXTINGUISHED WITHIN 5 MINS. ON THE GROUND APU START WAS SUCCESSFUL. GROUNDED - YES. REMOVED APU FCU AND INSTALLED SERVICEABLE APU FCU REF B737-800 AMM 49-31-11.

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