# SDR Q2SA20190702423

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 2, 2019
- Submitted: July 3, 2019
- Operation: Air carrier
- Aircraft: [N5153A](https://openairdocs.org/aircraft/N5153A), registered now
- Make and model: Boeing 737-83N
- Registry model: [Boeing 737-83N](https://openairdocs.org/model/boeing-737-83n) (OpenAirDocs)
- Aircraft serial: 32884
- Aircraft time: 46,892 hours, 26,778 cycles
- System (JASC): [2424 · AC Regulator](https://openairdocs.org/jasc/2424)
- Part: Gcu
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: UK
- How discovered: O
- Nature of condition: J, B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/Q2SA20190702423

## Discrepancy

AIRCRAFT GROUNDED. DURING THE "BEFORE START CHECKLIST", THE APU GEN TRIPPED OFF AND A STRONG ELECTRICAL SMELL FILLED THE COCKPIT.  RESET APU GCU IAW AMM 24-21-81. VERIFIED ALL SYSTEMS OP CHECK GOOD.

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