d. Disconnect cable from chain by removing cotter pin, nut, clevis pin, and bushing.
e. Remove flap handle bracket and cover.
f. Lift aft section of tunnel carpet far enough to remove screws securing tunnel cover that is between
flap handle and spar cover. Remove cover.
g. Remove cotter pin cable guard from flap cable pulley located inside floor tunnel just ahead of spar
housing.
h. Remove cable rub blocks located in floor opening on aft side of spar housing by removing
attaching screws.
i. Disconnect cable turnbuckle at flap handle by removing cotter pin, nut, washer, bushing* and bolt.
Check clevis bolt for wear. Replace bolt if any wear is evident. *(See latest revision of Piper
Service Bulletin 965.)
3. Remove flap handle and bracket by disconnecting cable turnbuckle from handle and removing bolts
securing bracket to floor tunnel.
INSTALLATION OF WING FLAP CONTROLS (figure 27-l9)
1. Install flap torque tube assembly as follows:
a. Install chain sprocket with chain on torque tube and secure with bolts, washers, and nuts.
b. Slide tube stop fittings on their respective ends of torque tube.
c. Ensure that one bearing block fitting is installed between its attachment brackets.
d. Slide other bearing block over its respective end of torque tube.
e. Position torque tube by placing end with bearing block on it between mounting bracket and sliding
other end into previously attached bearing block.
f. Position remaining bearing block and secure with bolts, washers, and nuts.
g. Push torque tube cranks (arms) on each end of torque tube and slide stop fitting in place. Align
bolt hole of crank and stop fitting with holes in torque tube and install bolts. Holes in stop fitting
are elongated to allow stop fitting to be pushed against bearing blocks thus allowing no side play
of assembly. Tighten bolt assemblies on stop fittings.
h. Install tube support blocks on their support brackets and secure with bolts.
i. Connect flap return spring to return chain and at spar housing.
j. Connect control cable end to tension chain and secure with bushing, clevis bolt, nut, and cotter pin.
k. Pull flap handle full back and connect tension spring. Release flap handle to forward position.
l. Connect flap control tube to flap and torque tube crank and secure. Bolt and bushing that connect
control tube to crank is installed through a hole in side of fuselage located over torque tube.
2. To install flap handle with bracket, place assembly on floor tunnel and secure with bolts.
3. Install flap control cable as follows:
a. Attach cable and turnbuckle to flap handle arm and secure with clevis bolt, bushing*, washer, nut
and cotter pin. Ensure that turnbuckle end is free to rotate on arm. *(See latest revision of Piper
Service Bulletin 965.)
b. Route cable through tunnel and spar housing.
c. Install cable rub blocks on aft side of spar housing and secure with screws.
d. Install cotter pin cable guard over pulley located just ahead of spar housing in floor tunnel.
e. Attach cable end to tension chain and secure with bushings, clevis bolt, nut, and cotter pin. If chain
is not installed because of torque tube assembly being removed, install assembly as given in step 3.
f. Pull flap handle full back and connect tension spring to cable end.
4. Install tunnel cover and secure with screws. Install tunnel carpet and bracket cover.
5. Install and secure seats.
27- 51 - 00
Page 27 - 39
Interim Revision: February 15, 1995
1L14
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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