# SDR ASAA2023020441813

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2023
- Submitted: February 7, 2023
- Operation: Air carrier
- Aircraft: [N587AS](https://openairdocs.org/aircraft/N587AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35684
- Aircraft time: 54,311 hours, 15,827 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Not Reported
- Part number: NOTREPORTED
- Part serial: NOTREPORTED
- Condition: Not Reported
- Location: Not Reported
- 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/ASAA2023020441813

## Discrepancy

BOTH PACK LIGHTS ILLUMINATE ON RECALL. LIGHTS EXTINGUISH WHEN MASTER CAUTION IN RESET. GROUNDED - YES. PERFORMED B737-800 AMM 21-61-00 PACK/ZONE TEMP CONTROL BITE TEST. FOUND FAULT FOR RIGHT AND LEFT RAM AIR DOOR ACTUATORS. FAULT WAS RESET AND OPS CHECKED GOOD. PERFORMED AMM 20-60-99 AIRCRAFT POWER DOWN FOR TROUBLESHOOTING AND PERFORMED AMM 21-61-00 PACK/ZONE TEMP CONTROL BITE TEST TO VERIFY NO FAULTS. NO FAULTS TRIGGERED. OPS CHECK GOOD.

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