# SDR ASAA2019052729470

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 27, 2019
- Submitted: May 28, 2019
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 41,416 hours, 12,409 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019052729470

## Discrepancy

LEFT PACK LIGHT ILLUMINATED UPON DESCENT, IT EXTINGUISHED UPON RECALL. GROUNDED - YES. RESET BOTH #1 AND #2 PACK/ZONE TEMPERATURE CONTROLLERS, RAN BITE CHECKS ON BOTH CONTROLLERS, OPS CHECK GOOD IAW AMM 21-61-00-700-806-002, THEN RAN BOTH PACKS (LT AND RT) FOR 30 MINUTES, NO ISSUES, NO PROBLEMS. RAN BITE TEST AGAIN ON #1 AND #2 PACK/ZONE TEMPERATURE CONTROLLERS, OPS CHECK GOOD AGAIN.

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