# SDR UIEA2024062700571

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 27, 2024
- Submitted: June 28, 2024
- Operation: Air carrier
- Aircraft: [N412MC](https://openairdocs.org/aircraft/N412MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 30559
- Aircraft time: 97,253 hours, 15,746 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Modulating Valve
- Part number: 7192244
- Part serial: 9910053
- Condition: Faulted
- Location: Cabin Temp
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2024062700571

## Discrepancy

DIVERSION: FLIGHT DECK AND UPPER DECK AREA TEMPERATURE UNCONTROLLABLE.(<P>R/R FLT DECK ZONE TRIM MOD VLV AND ZONE TEMP CONTROL MOD PER AMM 21-61-10/401 AND 21-61-01/401. OPS CHK GOOD. </P>)

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