Installation Of Cowl Flap Position Sender Assembly; Rigging And Adjustment Of Cowl Flap Position Sender; Propeller; Removal Of Propeller - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
8-15. INSTALLATION OF COWL FLAP POSITION SENDER ASSEMBLY. (Refer to Figure 8-2.)
a. Start the sender unit (16) through its mounting hole far enough to start the locknut and the
sender arm (19) on its shaft.
b.
Position the sender by placing the index tab on the sender into the index slot in the mounting
bracket and secure the sender. Allow the arm free to rotate on its shaft (18) until the sender is rigged to the
position indicator.
c. Connect the electrical leads to the sender.
d. Rig the sender per paragraph 8-16.
e.
Install access plate.
8-16. RIGGING AND ADJUSTMENT OF COWL FLAP POSITION SENDER. (Refer to Figure 8-2.)
a. Remove the access plate located on top of the engine nacelle aft of the fire wall.
b.
Ascertain that there is approximately 4.75 inches between the center of the pivot bolt (20) on
the sender arm (19) and the rod hole in the torque tube arm by adjusting pivot bolt on the rod that
connects the two arms.
c. Ascertain that the cowl flap is properly adjusted per paragraph 8-13.
d. With the sender arm (19) free to rotate and the cowl flap door aligned with the bottom cowl,
rotate the sender shaft, as viewed from the shaft end, in a clockwise direction to its stop position.
e.
Turn on the master switch. A minimum of 24 volts must be supplied to the electrical system
when making this adjustment.
f.
Rotate the sender shaft slowly counterclockwise, when viewed from the shaft end, until the flap
indicator on the instrument panel reads flap closed. Tighten the arm on the sender shaft.
g. Operate the flap to the open and close positions and observe the indicator reading. Indicator
pointer should travel to both opened and closed position on the indicator dial.
h. Install the access plate.
8-17. PROPELLER.
WARNING
Before performing any service functions on the propeller, ascertain
that the master switch is "OFF," the magneto switches are "OFF"
(grounded) and the mixture control is in the "IDLE CUT-OFF"
position.
CAUTION
Under no condition should blade arms be used on this propeller.
8-18. REMOVAL OF PROPELLER. (Refer to Figure 8-3.)
NOTE
In some manner identify the position of each part in relation to
the other to facilitate installation. Do not scratch the surfaces.
a.
Remove the spinner nose cap (7) and release the air charge.
b. Remove the spinner by removing the safety wire (8) and check nut (9) from the propeller at the
forward end of the forward spinner bulkhead and the screws that secure the spinner to the aft bulkhead.
c. Remove the engine cowling. (Refer to paragraph 8-6.)
Reissued: 9/23/80
POWER PLANT
2H10