Wing Flap Controls Installation; Wing Flaps Rigging And Adjustment - Piper PA-44-180 SEMINOLE Maintenance Manual

INSTALLATION OF WING FLAP CONTROLS. (Refer to Figure 27-25.)
1. The nap torque tube assembly may be installed by the following procedure:
A. Install the chain sprockets with chains on the torque tube and secure with bolts, washers and nuts.
B. Slide the tube stop fittings on their respective ends of the torque tube.
C. Ascertain that one bearing block fitting is installed between its attachment brackets.
D. Slide the other bearing block over its respective end of the torque tube.
E. Position the torque tube by placing the end with the bearing block on it between the mounting
bracket and sliding the other end into the previously attached bearing block.
F. Position the remaining bearing block and secure with bolts, washers and nuts.
G. Push the torque tube cranks (arms) on each end of the torque tube and slide the stop fitting in
place. Align the bolt hole of the crank and stop fitting with the holes in the torque tube, and
install bolts.The holes in the stop fitting are elongated to allow the stop fitting to be pushed
against the bearing blocks thus allowing no side play of the assembly.Tighten the bolt assemblies
on the stop fittings.
H. Install the tube support blocks on their support brackets and secure with bolts.
I. Connect the nap return spring to the return chain and! or at the spar housing.
J. Connect the control cable end to the tension chain and secure with bushing, clevis bolt, nut and
cotter pin.
K . Pull the flap handle full back and connect the tension spring. Release the nap handle to the forward
position.
L . Connect the nap control tube to the flap and/ or torque tube crank and secure.The bolt and bushing
that connects the control tube to the crank is installed through a hole in the side of the fuselage
located over the torque tube.
2. To install the nap handle with bracket, place the assembly on the floor tunnel and secure with bolts.
3. The nap control cable may be installed by the following procedure:
A. Attach the cable and turnbuckle to the flap handle arm and secure with a new clevis bolt, nut and
cotter pin. Ascertain that the turnbuckle end is free to rotate on the arm.
B. Route the cable through the tunnel and spar housing.
C. Install the cable rub blocks on the aft side of the spar housing and secure with screws.
D. Install cotter pin cable guard over pulley located just ahead of the spar housing in the forward
floor tunnel.
E. Attach the cable end to the tension chain and secure with bushing, clevis bolt, nut and cotter pin.If
the chain is not installed because of the torque tube assembly being removed, install the assembly
as given in Step 3.
F. Pull the flap handle full back and connect the tension spring to the cable end.
4. Install the tunnel cover and secure with screws. Also the tunnel carpet, heat deflectors, and bracket
cover.
5. Install the floor panel and seat belt attachments. Secure with screws and install seats.
RIGGING AND ADJUSTMENT OF WING FLAPS.
1. Place the flap handle in the full forward, flap retracted position.
2. If not previously accomplished, remove the floor panel just aft of the main spar.
3. If required, adjust the flap up stop and step lock, loosen the jam nut of the right torque tube stop screw.
located in the floor opening along the outer end of the flap torque tube, and turn the stop screw to
obtain approximately 0.60 of an inch between the stop fitting and the bearing block as measured along
the top side of the screw. (Refer to Figure 27-26.)It may be necessary to loosen the adjustment screw
of the left stop.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
1L21
PPS50033
27-50-02
Page 27-43
Revised: June 20, 1995