# SDR ASAA2018100326351

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2018
- Submitted: October 4, 2018
- Operation: Air carrier
- Aircraft: [N435AS](https://openairdocs.org/aircraft/N435AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43292
- Aircraft time: 19,921 hours, 6,565 cycles
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Not Reported
- Condition: Malfunctioned
- Location: Electrical Sys
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018100326351

## Discrepancy

NR 1 GENERATOR ONLY POWERS HALF THE BUSES WHEN PUT ONLINE. GROUNDED - YES. BITE TESTED NR 1 GCU REF FIM 24-21-00-810-801. NO FAULTS. BITE TESTED BPCU REF FIM 24-41 TASK 801. NO FAULTS. RAN NR 1 ENGINE AND APPLIED POWER WITH NR 1 ENG GEN ALL BUSES POWERED NORMALLY REF AC GENERATION OPS TEST 24-21-00-700-803. BITE TESTED NR 1 GCU AND BPCU AGAIN. NO FAULTS. INTERMITTENT FAULT PER FIM. NO HISTORY.

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