# SDR ASAA2023102645853

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 26, 2023
- Submitted: October 27, 2023
- Operation: Air carrier
- Aircraft: [N590AS](https://openairdocs.org/aircraft/N590AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35687
- Aircraft time: 57,090 hours, 17,119 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: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023102645853

## Discrepancy

RH PACK LIGHT ILLUMINATES ON RECALL. RESETS W/ MC. GROUNDED - YES. (RESOLVED ON W/O: 1975207 TASKCARD: N/R-00001 ) INITIAL EVALUATION, NO PACK LT LH/RH ON MASTER RECALL. PZTC BITE IAW FIM 21-62 TASK 801. #2 CONTROLLER FOR RH PACK, NO FAULTS. #1 PZTC HAD CONTROLLER FAULT - "STANDBY PACK" ON PREV FLT, GREEN ON BIT, CLEARED GREEN ON VERIFY. FOLLOWING FIM 21-62 TASK 802, INDICATES #1 CONTROLLER FAULT. RAN BOTH PACKS FULL COLD/FULL WARM, INDEPENDANTLY AND TOGETHER IAW AMM 21-61-00-700-807-002. NO DEFECTS NOTED. NO A/C HISTORY FOR CONTROLLER FAULTS 1/2 PZTC. THIS CLEARS MEL 21-32B. PLACARDS REMOVED. SEAMC PETER NOTIFIED. NO A/C CONFIG CHANGES.

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