# SDR ASAA2023080344435

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2023
- Submitted: August 7, 2023
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 54,269 hours, 15,994 cycles
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- 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/ASAA2023080344435

## Discrepancy

APU WOULDN'T START ELEC LIGHT ILLUMINATED. GROUNDED - YES. ACCOMPLISHED ELEC LIGHT MESSAGE BITE PROCEDURE PER FIM 24-31 TASK 801. FOUND SPCU FAULT, SPCU FAULT WOULD NOT RESET. FOUND SW HOT BAT BUS C/B OPENDED. RESET C/B PER MM 20-60-01. REACCOMPLISHED ELEC LIGHT BITE CHECK. SPCU FAULT CLEARED. ACCOMPLISHED APU BITE PER FIM 49-60 TASK 801. NO CURRENT FAULTS FOUND. STARTED APU PER MM 49-11-00 APU STARTED AND OPS CHECK NORMAL.

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