SDR ASMF200711001

Service difficulty report · Mixing Valve · Boeing 737*

Difficulty date: November 2, 2007
Submitted: November 6, 2007
Operation: Air carrier
Aircraft: N857AM
Make and model: Boeing 737*
Aircraft serial: 33793
Aircraft time: 9,213 hours, 5,027 cycles
Engine: Cfmint CFM567B22
System (JASC): 2160 · Cabin Temperature Control System
Part: Mixing Valve
Part number: 39811611
Part serial: 7968
Condition: Failed
Location: Cabin Temp
Part time: 9,213 hours, 5,027 cycles
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

CAPTAIN REPORTED AIR CONDITIONED TEMPERATURE CONTROL OUT OF SERVICE, MAINTENANCE PERSONNEL PERFORMED FIM PROCEDURE 21-61 TASK 847, CLEANED AND RECONNECTED THE RT MIX VALVE CONNECTOR, TESTED CORRECT. LATER, DURING OVERNIGHT CHECK, THE RT SIDE AIR MIX VALVE WAS REPLACED IAW MM 21-61-02, TESTED CORRECT.