# SDR ASAA2020012631978

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2020
- Submitted: January 29, 2020
- Operation: Air carrier
- Aircraft: [N588AS](https://openairdocs.org/aircraft/N588AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35685
- Aircraft time: 46,437 hours, 13,906 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Controller
- Condition: Failed
- Location: A/C Pack
- 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/ASAA2020012631978

## Discrepancy

PERFORMED RECALL AFTER PUSHBACK ACCOMPLISHED AFTER START CHECKLIST AND GOT AIR CONDITION LIGHT AND ASSOCIATED RIGHT PACK LIGHT.  PRESSED MASTER CAUTION LIGHT, PACK LIGHT AND AIR CONDITION LIGHT EXTINGUISHED, INIDICATING PRIMARY OR SECONDARY PACK CONTROLLER FAILED. GROUNDED - YES.  ACCOMPLISHED BITE TEST IAW AMM 21-61-00-700-8067-002. BIT & PREV FLT INDICATED TCV FAULT. FAULT RESET. RAN TEST SEVERAL TIMES WITH A GO RESULT.  OP TESTED GOOD IAW AMM TASK 21-61-00-700-807-002.

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