# SDR ASAA2023101945752

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2023
- Submitted: October 23, 2023
- Operation: Air carrier
- Aircraft: [N587AS](https://openairdocs.org/aircraft/N587AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35684
- Aircraft time: 56,634 hours, 16,587 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/ASAA2023101945752

## Discrepancy

L PACK LIGHT ILLUMINATED SINGLE CHANNEL FAULT. GROUNDED - YES. REF FIM 21-53 TASK 821, PERFORMED PZTC 1 + 2 BITE, PZTC 1 HAD RAM AIR ACTUATOR FAULT LIGHT. REF FIM 21-62 TASK 837 PERFORMED OPS TEST OF PACK 1, OPS TEST GOOD, L/H PACK LIGHT NOT ILLUMINATED, PERFORMED PZTC 1 (AND 2) BITE AGAIN, NO FAULTS, PZTC 1 FAULT CLEARED AND DID NOT RETURN, DURING BITE "VERIFY" L/H RAM AIR ACTUATOR OPS NORMAL. PER FIM THIS WAS AN INTERMITTENT FAULT. REMOVES CN: 20002587 SEAMC JOE NOTIFIED. THIS CLEARS MEL 21-32B.

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