# SDR UIEA2019121086021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2019
- Submitted: December 10, 2019
- Operation: Air carrier
- Aircraft: [N1499A](https://openairdocs.org/aircraft/N1499A), registered now
- Make and model: Boeing 767328
- Aircraft serial: 27428
- Aircraft time: 79,408 hours, 17,477 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Modulating Valve
- Part number: 3987865
- Part serial: 667
- Condition: Malfunctioned
- Location: Cockpit Air
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2019121086021

## Discrepancy

COCKPIT TEMP REGULATION IS ERRATIC, VALVE CYCLES FROM WARM TO COLD (FULL DEFLECTION). COCKPIT TEMP VARIES CONSTANTLY, UNABLE TO COOL COCKPIT BELOW 21C. (<P>TRANSFERRED TO DMI 121748 PER MEL 21-61-04-02. PLACARDS INSTALLED AND MCC NOTIFIED.</P><P>LP 1224647 - M11: REMOVED AND REPLACED FLIGHT DECK TRIM AIR MODULATING VALVE IAW AMM 21-61-02, OPS CHECK GOOD. THIS CLEARS MDDR 121748. MCC NOTIFIED AND PLACARD REMOVED.</P><P><BR /></P>)

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