Piper Navajo PA-31 Service Manual page 763

PIPER NAVAJO SERVICE MANUAL
1-113. ADJUSTMENT OF LIFT DETECTOR. The lift detector switch is adjusted at the factory when the
airplane is test flown. and should not require any further adjustment during the normal service life of the
airplane. Should some type of service on the wing require removing the switch. the following instructions will
help in positioning the switch at the proper position.
Loosen the two Phillips head screws: one on either side of the vane. If the stall warning comes on too late,
move the switch up If the stall warning comes on too early, move the switch down. Retighten the screws after
making any adjustments.
CAUTION
Never try to adjust the switch by bending the vane.
The only way to test the accuracy of the setting is to fly the airplane into a stall condition and NOTE the
speed at which the stall warning comes on. The stall should be made with the flaps and landing gear up and
power off. It may be necessary to make several test flights and alternate adjustments before the desired setting
is obtained. The stall warning should come on not less than five or more than ten miles per hour before the
actual stall occurs.
11-114. POSITION LIGHTING.
11-115. REMOVAL OF WING TIP POSITION LIGHT. The wing tip position lights are located on each
wing tip, inside a plexiglas cover.
a. Remove the screws securing the plexiglas cover to the wing tip.
b. Remove the screw securing the lens retainer to the light assembly.
c. Remove the lens retainer and lens.
NOTE
To remove the complete light assembly, the wing tip must be
removed.
11-116. INSTALLATION OF WING TIP POSITION LIGHT.
a. Install the bulb and lens.
b. Secure lens retainer with appropriate screw.
c. Place plexiglas cover in position on wing tip and secure with appropriate screws.
11-117. REMOVAL OF TAIL POSITION LIGHT. The tail position light is located on the tip of the tail.
a. Remove the screws securing the lens retainer to the light assembly, and remove lens retainer and
lens.
b. Remove bulb.
Revised: 1/29/82
4D13
ELECTRICAL SYSTEM
4D 13