# SDR ASAA2023083044984

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 30, 2023
- Submitted: September 8, 2023
- Operation: Air carrier
- Aircraft: [N973AK](https://openairdocs.org/aircraft/N973AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43346
- Aircraft time: 5,651 hours, 1,627 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989085
- Part serial: 20747
- Condition: Faulty
- Location: Right Ecs Bay
- Part time: 30,209 hours, 10,670 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023083044984

## Discrepancy

TECH SERVICES REQUEST FOR FOLLOW-UP TO AERMETRIC FAULT 21-55091(RT PACK TCV IS OUT OF RANGE OR VALVE IS NOT IN COMMANDED POSITION)----(#PRI2)----ETOPS SIGNIFICANT SYSTEM----. GROUNDED - YES. TECH SERVICES RECOMMEND TO REMOVE AND REPLACE THE RIGHT PACK TEMPERATURE CONTROL VALVE AS PRECAUTION. REF AMM 21-51-10/401. (RESOLVED ON W/O: 1967902 TASKCARD: N/R-00001 ) TASK CARD COMPLIED WITH.

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