# SDR ASAA2023101845859

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 18, 2023
- Submitted: October 27, 2023
- Operation: Air carrier
- Aircraft: [N581AS](https://openairdocs.org/aircraft/N581AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35188
- Aircraft time: 57,479 hours, 17,160 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 476846
- Condition: Faulty
- Location: Lower Lh Fuselag
- Part time: 27,915 hours, 9,891 cycles
- 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/ASAA2023101845859

## Discrepancy

BLUE LIGHT ILLUMINATED ON THE NITROGEN SYSTEM. GROUNDED - YES. (RESOLVED ON W/O: 1974467 TASKCARD: N/R-00004 ) REMOVED AND REPLACED L/H RAM AIR DOOR ACTUATOR PER FIM 47-31 TASK 819 AND AMM 21-51-21. OPS CHK GOOD. PACK / ZONE TEMP CONTROLER SHOWS RAM AIR CONT FAIL. REMOCED AND REPLACED L/H PACK / ZONE CONTROLER. OPS CHK GOOD. REF AMM 21-61-20. THESE ACTIONS CLEAR MEL 47-1B. PLACARDS REMOVED. SEAMC NOTIFIED.

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