Service difficulty report · Pcu · Boeing 777222

Difficulty date
April 28, 2014
Submitted
April 30, 2014
Operation
Air carrier
Aircraft
N795UA
Make and model
Boeing 777222
Aircraft serial
26927
Aircraft time
72,783 hours, 10,253 cycles
Engine
Pwa PW4090
Part
Pcu
Condition
Malfunctioned
Location
Lt Elevator
Stage of operation
UK
How discovered
O
Nature of condition
F
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FLIGHT CONTROLS SYS BELOW MINIMUM DISPATCH REQUIREMENTS. STATUS MSG 01- LATCHED CRUISE MODE DEPENDENT, ELEVATOR POWER CONTROL UNIT, LT OTBD, DOES NOT FOLLOW COMMAND. DB PRIMARY FLIGHT COMPUTER RT MSG 02- ACTIVE CRUISE MODE DEPENDENT, ELEVATOR POWER CONTROL UNIT LT OTBD BYPASS SOLENOID OPERATED VLV IS NOT IN COMMANDED POSITION. DB PRIMARY FLIGHT COMPUTER RT. REPLACED LT ELEVATOR OTBD PCU IAW AMM 27-31-09 & NO ACTIVE FAULTS.