Service difficulty report · Control Unit · Boeing 767338

Difficulty date
March 3, 2020
Submitted
March 6, 2020
Operation
Air carrier
Aircraft
N364CM
Make and model
Boeing 767338
Aircraft serial
24531
Aircraft time
89,040 hours, 33,149 cycles
Part
Control Unit
Part number
367027006
Part serial
811
Condition
Faulty
Location
Hydraulic Sys
Part time
58,602 hours, 23,731 cycles
Stage of operation
CR
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

L HYD QTY EICAS + LHYD SYS PRESS EICAS + RUDDER RATIO EICAS + RT YAW DAMPER EICAS MESSAGES DISPLAYED. HYDRAULIC CONTROL UNIT WAS REPLACED. AIRCRAFT WAS GROUNDED. MAINTENANCE SUSPECTS FAULTY VALVE FOR EICAS MESSAGES.