Service difficulty report · Modulating Valve · Boeing 767328
FAA SDR system
- Difficulty date
- December 8, 2019
- Submitted
- December 10, 2019
- Operation
- Air carrier
- Make and model
- Boeing 767328
- Aircraft serial
- 27428
- Aircraft time
- 79,408 hours, 17,477 cycles
- 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
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
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>)