# SDR ASAA2021120536812

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2021
- Submitted: December 7, 2021
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 30,392 hours, 9,662 cycles
- System (JASC): [7410 · Ignition Power Supply](https://openairdocs.org/jasc/7410)
- Part: Exciter
- Part number: 9238M66P08
- Part serial: UNJFE711
- Condition: Inoperative
- Location: #1 Engine
- Part time: 48,517 hours, 15,825 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021120536812

## Discrepancy

LH IGN ON #1 ENG IS INOP. GROUNDED - YES. PERB737-900  FIM 74-21 TASK 806 FOUND L1 EXCITER INOP. REMOVED AND REPLACED L1 EXCITER OPS CHECK GOOD PER B737-900 AMM 74-11-01.

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