# SDR ASAA2017090121782

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2017
- Submitted: September 5, 2017
- Operation: Air carrier
- Aircraft: [N536AS](https://openairdocs.org/aircraft/N536AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35203
- Aircraft time: 21,794 hours, 6,289 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Light
- Condition: False Activation
- Location: Lt A/C Pack
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017090121782

## Discrepancy

LEFT PACK ON DURING RECALL, RESETS WITH MASTER CAUTION RESET.  ACFT GROUNDED.   PERFORMED INITIAL EVALUATION AND FAULT ISOLATION OF THE LT PACK IAW FIM 21-62 TASK 848,  AND 21-62 TASK 801. NO FAULTS FOUND. OPERATED APU AND RAN BOTH PACKS,  NO PACK LIGHT SHOWN OR ON RECALL. COULD NOT DUPLICATE.

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