# SDR ASAA2012101493112

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 14, 2012
- Submitted: October 17, 2012
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 17,513 hours, 5,462 cycles
- Engine: Cfmint CFM567B273
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989083
- Part serial: 7948
- Condition: Malfunctioned
- Location: Rt A/C Pack
- Part time: 24,809 hours, 8,173 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/ASAA2012101493112

## Discrepancy

RT PACK TRIP WITH MASTER CAUTION DID NOT RESET.  REPLACED RT PACK TEMP CONTROL VALVE IAW MM 21-51-10. PERFORMED PACK /ZONE BITE TEST RT PACK, RESET FAULTS IAW MM 21-61-00. PERFORMED OPS AND LEAK CHECK IAW MM, NO FAULT OR LEAKS NOTED, OPS CHECK GOOD.

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