# SDR ASAA2020081633038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 2020
- Submitted: August 19, 2020
- Operation: Air carrier
- Aircraft: [N564AS](https://openairdocs.org/aircraft/N564AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35103
- Aircraft time: 51,576 hours, 15,519 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Light
- Condition: False Activation
- Location: A/C Pack
- 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/ASAA2020081633038

## Discrepancy

MASTER CAUTION AIR COND LIGHT ILLUMINATED AFTER RUNNING DESCENT CHECKLIST.  LEFT PACK LIGHT ILLUMINATED.  LIGHT EXTINGUISHED AFTER PRESSING MASTER CAUTION - PRESS TO RESET, RAN QRH 12.2.  GROUNDED - YES.  NR 1 ZONE CONT LOGGED RAM AIR ACT FAULT.  FAULT CLEARED & SYS OPS CHECKS NORMAL, PER B737-800 AMM 21-61-00.  RAN PACKS, NO FAULTS NOTED.  GND VERIFICATION SUCCESSFUL.

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