# SDR ASAA2023011951559

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 15, 2023
- Submitted: January 19, 2023
- Operation: Air carrier
- Aircraft: [N448AS](https://openairdocs.org/aircraft/N448AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36356
- Aircraft time: 23,986 hours, 7,515 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989085
- Part serial: 27637
- Condition: Faulted
- Location: Rt Acm
- Part time: 1,542 hours, 482 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023011951559

## Discrepancy

RIGHT PACK LIGHT ILLUMINATED IN TAXI. EXTINGUISHES WITH MASTER RESET. GROUNDED - YES. REMOVED & REPLACED R. PACK TEMP CONTROL VALVE, REF B737-900 AMM 21-51-10.

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