Maintenance and Adjustments
Teledyne Continental Motors, Inc.
TM
2.
Insert a broad tip common screwdriver into the TPS adjustment slot to set the TPS
position farthest away from the actuator cam.
3.
Open the throttle valve to the WIDE OPEN position. Confirm the Wide-Open
Throttle Stop Screw contacts the Wide-Open Throttle Stop Pin.
4.
Insert a 0.003-inch feeler gage between the backside of the TPS actuator button and
the TPS Housing.
5.
Adjust the TPS actuator cam with a broad tip common screwdriver to provide an
interference fit for the 0.003-inch feeler gage between the actuator and housing.
CAUTION: Avoid overloading the TPS. Excessive pressure or side
loads applied to the switch may cause permanent damage.
6.
Tighten the TPS securing screw while continuing to hold the feeler gauge in place.
7.
Tighten the pivot screw and remove the feeler gauge.
8.
Close the throttle and return it to the WIDE OPEN position. Check the distance
(0.003-inches) between the back of the TPS actuator and the TPS housing with the
feeler gauge. Repeat the adjustment, if required.
9.
Place the aircraft Master Power Switch, FADEC Primary and Secondary Power
Switches in the ON position.
10.
Cycle the throttle from OPEN to CLOSED positions while monitoring the instrument
panel WOT indicator.
RESULT: HSA WOT lamp illuminates each time the throttle is placed in the
WIDE OPEN position, indicating the TPS is tripping between 3
°
-5
°
before the
WIDE OPEN position. If the WOT lamp does not illuminate while the throttle is
in the WIDE OPEN position, repeat the adjustment. If the Throttle Position
Switch is malfunctioning, replace it according to instructions in Chapter 10.
11.
Master Power Switch ...........................................OFF
12.
FADEC Primary Power Switch ...........................OFF
13.
FADEC Secondary Power Switch .......................OFF
9-18
IOF-240 Series Engine Maintenance Manual
Change 1
31 August 2007
