Service difficulty report · Anti-Ice Valve · Boeing 777222

Difficulty date
January 26, 2010
Submitted
January 27, 2010
Operation
Air carrier
Aircraft
N788UA
Make and model
Boeing 777222
Aircraft serial
26942
Aircraft time
56,045 hours, 8,201 cycles
Engine
Pwa PW4090
Part
Anti-Ice Valve
Part number
8106013
Part serial
9701013
Condition
Faulty
Location
Lt Wing
Stage of operation
NR
How discovered
9
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

ANTI-ICE WING FAILURE OF RT OR LT WING VALVE IN THE CLOSED POSITION, OR WAI AIR TEMPERATURE LESS THAN 200 DEGREES F AND WAI SWITCH IN EITHER THE ON POSITION OR THE AUTO POSITION WITH ICING CONDITIONS DETECTED, OR FAILURE OF WAI CONTROL CARD, OR SYS FAILS CLOSED DUE TO WAI AIR TEMPERATURE LESS THAN 200 DEGREES F. REPLACED RT WAI VALVE. TEST FAULTED ACIPS CONTROL CARD. REPLACED ACIPS CARD.