# SDR ASAA2017122022961

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 2017
- Submitted: December 21, 2017
- Operation: Air carrier
- Aircraft: [N568AS](https://openairdocs.org/aircraft/N568AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35183
- Aircraft time: 41,558 hours, 12,641 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 8559
- Condition: No Test
- Location: Ram Air Exhaust
- Part time: 54,446 hours, 26,713 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017122022961

## Discrepancy

DURING A BITE TEST,  THE NR 1 TEMP CONTROLLER LT RAM AIR ACTUATOR FAILED, UNABLE TO CLEAR FAULTS.  ACFT GROUNDED.  REMOVED AND REPLACED THE LT RAM AIR ACTUATOR IAW MM 21-51-21. PERFORMED A BITE CHECK, NO FAULTS, CHECKED GOOD.

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