Service difficulty report · Pcu · Boeing 777222

Difficulty date
January 11, 2009
Submitted
January 14, 2009
Operation
Air carrier
Aircraft
N221UA
Make and model
Boeing 777222
Aircraft serial
30552
Aircraft time
30,397 hours, 3,944 cycles
Engine
Pwa PW40903
Part
Pcu
Part number
15441007
Condition
Failed
Location
Flaperon
Stage of operation
NR
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

FLIGHT CONTROL SYS ANY CONDITION OF THE FLIGHT CONTROL SYS OR IT'S SYS INTERFACES WHICH WOULD PREVENT DISPATCH. FLIGHT CONTROLS SYS BELOW MINIMUM DISPATCH REQUIREMENTS. STATUS MSG01- LATCHED CRUISE MODE DEPENDENT; FLAPERON PWR CONTROL UNIT (LT OTBD) DOES NOT FOLLOW COMMAND. DB- PRIMARY FLIGHT COMPUTER (RT) MSG02- LATCHED CRUISE MODE DEPENDENT; FLAPERON PWR CONTROL UNIT (LT OTBD) DOES NOT FOLLOW COMMAND. MSG-2710301 LATCHD ER MODE MSG-2710301 LATCHD ER MODE. REPLACED FLAPERON OTBD PCU. RIG CHECKS OKAY.