Service difficulty report · Modulating Valve · Boeing 777222

Difficulty date
February 7, 2012
Submitted
February 14, 2012
Operation
Air carrier
Aircraft
N774UA
Make and model
Boeing 777222
Aircraft serial
26936
Aircraft time
65,190 hours, 12,387 cycles
Engine
Pwa PW4077
Part
Modulating Valve
Part number
32907449
Part serial
6
Condition
Faulty
Location
Bleed Air Sys
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

FAMV L EICAS MSG RETURNED. MAINT TO ACP MEL 3611E. DF LEFT FAMV IAW MEL 3611 E. -CQT- :THIS FAN MOD VALVE ISSUE CAUSES ONE SEC OF CABIN TO BE VERY COLD AND CKPT TEMP TO BE DIFF TO CNTL. REPLACED L FAMV PER MM. OPS CHK OKAY.