Rigging And Adjustment Of Flap Position Sender; Inspection Of Time Delay Switch Operation; Flap Rigging Check Diagram - Piper Navajo Chieftain PA-31-350 Service Manual

NACELLE FLOOR
.73 INCHES
NOTE
AFTER RIGGING FLAPS, GAP "A" SHALL NOT
EXCEED .73 INCHES.
Figure 5-20. Flap Rigging Check
5-69. RIGGING AND ADJUSTMENT OF FLAP POSITION SENDER.
a. Lower the flaps and remove the access plates on the left-wing false spar at wing stations 92.50
and 101.00.
b. Lower the flap to an angle of 15 ± 1 (lift flap trailing edge to obtain angle measurement),
loosen sender arm (22) on the sender shaft (21) and rotate the shaft until the wing flap indicator on the
instrument panel shows the flap at the take-off position (bottom of white arc).
c. Tighten the arm (22) on the sender shaft. Check the three flap positions (retracted, take-off and
extended) with respect to the angular settings and indicated positions on the wing flap indicator.
d. Install the access plates.
5-70. INSPECTION OF TIME DELAY SWITCH OPERATION. This inspection should be done after the
flaps have been rigged and checked for normal operation.The time delay switch is installed in the flap
electrical system so that when the flap switch is actuated (flaps completely extended or retracted), and if
after one second the left flap does not move off the limit switches, the time delay switch shuts off the flap
motor. The right flap will travel approximately 9 ± I degrees.
a. Lower the flaps and remove the access plates to the limit switches in the left wing false spar at
wing stations 92.50 and 101.00.
b. With the flaps part way down, depress the up limit switch and select flap down. The system
should shut down within one second. With the limit switch still depressed (If the limit switch is opened the
time delay switch will reset and allow the system to become operative), return the flap selector switch to
neutral position and again select flaps down. The system should be inoperative. Determine that the flap
travel was not more than 9 ± 1 degrees.
c. Repeat step b except depress the down limit switch and select flaps up. The system should again
shut down in one second and the flap travel should not exceed 9 ± I degrees.
Revised: 10/5/83
SURFACE CONTROLS
Effectivity
DUKES
NAVAJO CHIEFTAIN SERVICE MANUAL
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