# SDR ASAA2017101922251

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2017
- Submitted: October 23, 2017
- Operation: Air carrier
- Aircraft: [N413AS](https://openairdocs.org/aircraft/N413AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35205
- Aircraft time: 18,387 hours, 5,980 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 038
- Condition: Faulted
- Location: Lt Ram Air Inlet
- Part time: 13,123 hours, 4,376 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017101922251

## Discrepancy

LEFT PACK LIGHT ILLUMINATED ON RECALL.  EXTINGUISHED WITH MASTER CAUTION RESET.  ACFT GROUNDED.  PERFOMED BITE CHECK OF THE NR 1 AND 2 ZONE TEMP CONTROLLERS.  FOUND THE NR 1 CONTROLLER FAULT FOR LEFT RAM ACTUATOR FAULT IAW FIM 21-62, 801.  REMOVED AND REPLACED THE LEFT RAM AIR INLET ACTUATOR IAW AMM 21-51-21-000-801, AND 21-51-21-400-801.  RAM AIR ACTUATOR OPS CHECKED GOOD.  PERFOMED BONDING CHECK OF LEFT RAM AIR INLET ACTUATOR,  BONDING CHECKED GOOD IAW AMM 21-51-21.

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