# SDR ASAA2019122031671

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 2019
- Submitted: December 24, 2019
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 23,196 hours, 7,519 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Light
- Condition: False Activation
- Location: Rt 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/ASAA2019122031671

## Discrepancy

RIGHT "PACK" LIGHT ILLUMINATES DURING MASTER CAUTION RECALL. LIGHT EXTINGUISHES WHEN MASTER CAUTION SYSTEM IS RESET. GROUNDED - YES.  PERFORMED FIM 21-53 TASK 821, PACK LIGHT IS ON DURING MASTER CAUTION RECALL. PACK LIGHT ON AIR COND. MODULE P5-10, DOES NOT COME ON, THEN THERE AN INTERMITTENT FAULT, OK FOR SERVICE. NO HISTORY ON RIGHT HAND PACK FOR 30 DAYS. PERFORMED FIM TASK 21-62 TASK 801 ALL FAULTS CLEARED AND NO DEFECTS NOTED.

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