SDR UIEA2020092522048

Service difficulty report · Modulating Valve · Boeing 76731A

Difficulty date: September 21, 2020
Submitted: September 25, 2020
Operation: Air carrier
Aircraft: N662GT
Make and model: Boeing 76731A
Aircraft serial: 27619
Aircraft time: 77,905 hours, 15,474 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Modulating Valve
Part number: 3987865
Part serial: 2155
Condition: Inoperative
Location: Cabin Temp
Stage of operation: NR
How discovered: O
Nature of condition: J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FWD CABIN TEMP HOT/ZONE TRIM AIR MODULATING VALVES, PASSENGER, INOPERATIVE VALVE CLOSED. TRANSFERRED TO MDDR 134780, IAW MEL & 21-61-04-01A, CAT C. R & R MODULATING VALVE ASSY (P/N 398786-5), IAW AMM 21-61-05. OPS CK GOOD, NO FAULTS NOTED. THIS CLEARS MEL 21-61-04-01A DMI 134780. PLACARD REMOVED. T/I 0270/DP.

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