Service difficulty report · Actuator · Lear 45LEAR

Difficulty date
November 1, 2001
Submitted
March 27, 2002
Operation
Air carrier
Aircraft
N419FX
Make and model
Lear 45LEAR
Aircraft serial
125
Engine
Garrtt TFE731*
Part
Actuator
Part number
4322997
Part serial
0334
Condition
Inoperative
Location
Rudder
Part time
541 hours
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

DURING A MAINTENANCE VISIT AND PREPARATION TO PERFORM ENGINE RUNS, A MECHANIC NOTICED AN ABSENCE OF RESISTANCE AT THE PILOTS RUDDER PEDALS WHILE SETTING THE PARKING BRAKE. AFTER AN UNSUCCESSFUL ATTEMPT TO ADJUST THE PILOTS RUDDER POSITION ACTUATOR, A MECHANIC GAINED ACCESS TO THE ACTUATOR AND FOUND THAT THE ACTUATOR ADJUSTMENT ROD WAS BENT. THIS COULD LEAD TO A LOSS OF BRAKING, RUDDER CONTROL AND NOSE WHEEL STEERING CAPABILITY. DUAL RUDDER PEDAL ADJUSTMENT ACTUATORS ARE INSTALLED BELOW THE COCKPIT FLOORBOARDS IMMEDIATELY ABOVE THE RUDDER CONTROL BELLCRANKS, AND PROVIDE FOR INDEPENDENT ADJUSTMENT OF RUDDER PEDAL POSITION.