# SDR ASAA2022120441041

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 4, 2022
- Submitted: December 12, 2022
- Operation: Air carrier
- Aircraft: [N486AS](https://openairdocs.org/aircraft/N486AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44107
- Aircraft time: 26,730 hours, 8,411 cycles
- System (JASC): [2620 · Extinguishing System](https://openairdocs.org/jasc/2620)
- Part: Electronic Unit
- Part number: 473925
- Condition: Faulty
- Location: Aft Cargo Compt
- Stage of operation: TX
- 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/ASAA2022120441041

## Discrepancy

AFT ARM LIGHT FAILS TO ILLUMINATE WHEN TESTING THE AFT CARGO FIRE PANEL. GROUNDED - YES. PER B737-900 FIM 26-16 TASK 806, REMOVED AND REPLACED LOWER AFT CEU (M2237). OPS CHECK GOOD. REF B737-900 AMM 26-16-02/401.

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