Service difficulty report · Thermostat · Boeing 747422

Difficulty date
March 19, 2013
Submitted
April 25, 2013
Operation
Air carrier
Aircraft
N116UA
Make and model
Boeing 747422
Aircraft serial
26908
Aircraft time
57,820 hours, 6,696 cycles
Engine
Pwa PW4056
Part
Thermostat
Condition
Failed
Location
Window Heat
Stage of operation
NR
How discovered
9
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

L2 WINDOW IS COLD, ON EICAS OR LIGHTS. REPLACED THE CONTROL THERMOSTAT SWITCH (S760) PER AMM 30-41-06 P401. TESTED GOOD.