# SDR ASAA2021112836752

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 28, 2021
- Submitted: December 1, 2021
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 30,343 hours, 9,641 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021112836752

## Discrepancy

RIGHT PACK LIGHT ILLUMINATED ON RECALL, RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. INITIAL EVALUATION, NO LIGHT ON RECALL. PERFORMED PZTC BITE IAW B737-900 FIM 21-62 TASK 801, NO FAULT ON BIT, RED LIGHT FOR SRADA EXHAUST ON PREV FLT, CLEARED ON VERIFY. RAN BOTH PACKS 15-20 MINS, NO FAULTS, NO LIGHTS. A/C OK FOR SERVICE.

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