SDR UIEA2020111702409

Service difficulty report · Modulating Valve · Boeing 76736N

Difficulty date: November 17, 2020
Submitted: November 18, 2020
Operation: Air carrier
Aircraft: N1093A
Make and model: Boeing 76736N
Aircraft serial: 30111
Aircraft time: 82,698 hours, 12,095 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: Modulating Valve
Part number: 3987865
Part serial: 5609
Condition: Malfunctioned
Location: Aft Cabin Temp
Stage of operation: CR
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

AFT CABIN TEMP INOPERABLE EICAS AND AFT CAB AUTO ANNUNCIATOR LIGHT ON OVERHEAD PANEL. TRANSFERRED TO DMI 137977, IAW MEL 21-61-01-02, CAT C, DUE 27NOV20. GTC 0950Z. C/W W/O 73354, REMOVED AND REPLACED AFT TRIM AIR MODULATING VALVE, IAW AMM 21-61-07. OPERATIONS CHECK GOOD. THIS CLEARS MDDR 137977. MCC NOTIFIED DISP: DL 1010Z.

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