# SDR ASAA2020021403138

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 10, 2020
- Submitted: February 19, 2020
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 45,261 hours, 13,503 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 1993
- Condition: Failed
- Location: Rt A/C Pack
- Stage of operation: DE
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020021403138

## Discrepancy

RIGHT PACK LIGHT ILLUMINATED ON RECALL AT TOP OF DESCENT. RESET WHEN M/C PUSHED. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 21-62 TASK 801 #2 CONTROLLER FAULTED TCV THIS PACK ON BIT AND GREEN ON PREV FLT, ON VERIFY HARD FAULTED TCV. REMOVED AND REPLACED RH PACK TCV PER B737-800 AMM 21-51-10/401. INSTALL TEST PASSED.

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