# SDR ASAA2020122333742

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2020
- Submitted: December 29, 2020
- Operation: Air carrier
- Aircraft: [N516AS](https://openairdocs.org/aircraft/N516AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39044
- Aircraft time: 43,845 hours, 13,221 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 1046354
- Condition: Inoperative
- Location: Ram Air Inlet
- Part time: 4,187 hours, 1,225 cycles
- Stage of operation: DE
- 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/ASAA2020122333742

## Discrepancy

DURING DESCENT CHECK PACK LIGHT (RT) ILLUMINATED DURING RECALL.  GROUNDED-YES.  PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST, ZONE TEMP CONT NR 2 FAULTED "RAM AIR DOOR ACTUATOR", REF B737-800 AMM 21-61-00.  REMOVED RT RAM AIR DOOR ACTUATOR AND REPLACED WITH NEW, REF AMM 21-51-21.  ETOPS SIG SYSTEM MAINTENANCE PERFORMED BY ETOPS CERT TECHNICIAN, PER ETOPS MANUAL.  ZONE TEMP CONTROLLER BITE TEST.

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