# SDR ASAA2020082503074

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2020
- Submitted: August 26, 2020
- Operation: Air carrier
- Aircraft: [N481AS](https://openairdocs.org/aircraft/N481AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44106
- Aircraft time: 19,348 hours, 6,196 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Message
- Condition: False Activation
- Location: Lt A/C Pack
- Stage of operation: NR
- 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/ASAA2020082503074

## Discrepancy

ON MC RECALL LT PACK LIGHT ILLUMINATED.  FOLLOWED QRH, EXTINGUISHED AFTER MC RESET.  GROUNDED - YES.  NR 1 ZONE TEMP CONT LOGGED SRADA EXIT FAULT.  PERFORMED PACK TEMP CONTROL BITE PROCEDURE ON THE NR 1 & 2 ZONE TEMP CONTROL UNIT, PER B737-900 FIM 21-62 TASK 801.  NO MAINT MSG NOTED AND GO LIGHTS VERIFIED GREEN.

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