TM 1-1510-225-10
2-73
NOTE
Condition levers must be in LOW IDLE
position to perform rudder boost check.
(2) The system is controlled by a switch,
placarded RUDDER BOOST / OFF, located on the
pedestal extension, and is to be turned on before
flight. A preflight check of the system can be
performed during the runup by retarding the power on
one engine to idle and advancing power on the
opposite engine until the power difference between the
engines is great enough to activate the switch to turn
on the rudder boost system. Movement of the
appropriate rudder pedal (left engine idling, right
rudder pedal moves forward) will be noted when the
switch closes, indicating that the system is functioning
properly for low engine power on that side. Repeat the
check with opposite power settings to check for
movement of the opposite rudder pedal. The system
is protected by a 5-ampere circuit breaker, placarded
RUDDER BOOST, located on the right sidewall circuit
breaker panel.
2-38. FLIGHT CONTROL LOCKS.
CAUTION
Remove control locks before towing the
aircraft or starting engines. Serious
damage could result in the steering linkage
if towed by a tug with the rudder lock
installed.
A removable lock assembly consisting of two
pins, and an elongated U-shaped strap interconnected
by a chain provides positive locking of the rudder,
elevator and aileron control surfaces, and engine
controls
(POWER
levers,
PROP
levers,
and
CONDITION levers). Refer to Figure 2-23. Installation
of the control locks is accomplished by inserting the U-
shaped strap around the aligned control levers from
the copilot's side; then the aileron/elevator locking pin
is inserted through a guide hole in the top of the pilot's
control column assembly. The rudder is held in a
neutral position by an L-shaped pin that is installed
through a guide hole in the floor aft of the pilot's rudder
pedals. The rudder pedals must be centered to align
the hole in the rudder bellcrank with the guide hole in
the floor. Remove the locks in reverse order (rudder
pin, control column pin, and power control clamp).
1. Aileron-Elevator Lock Pin
2. Engine Controls Lock Bar
3. Rudder Lock Pin
Figure 2-23. Control Locks
