Piper Cherokee LANCE, Service Manual

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PIPER CHEROKEE SIX / LANCE SERVICE MANUAL
IV - STRUCTURES 07/15/06
1F24
To use this tool:
(1) Ensure that the control surface is in its final flight configuration, static wicks, trim tabs, trim
tab push-pull rod and control surface tip (as applicable) should be installed. The surface should
be painted and trim/servo tabs should be in the neutral position.
NOTE: Because paint is a considerable balance factor, it is recommended that existing paint
be removed prior to repainting a control surface.
(2) Place hinge bolts through control surfaces and place control surface on a holding fixture.
(3) Calibrate the tool.
(a) Avoiding rivets, place the balancing tool on the control surface with the tool’s hinge
centerline directly over the hinge line of the control surface.
(b) Adjust the movable trailing edge support to fit the width of the control surface. Tighten
the set screw on the trailing edge support.
(c) Adjust the trailing edge support vertically until the beam is parallel with the control
surface chord line.
(d) Remove the tool from the control surface and balance the tool itself by adding or
removing nuts or washers from the beam balancing bolt. When balancing the tool, the
movable weight must be at the bar’s hinge centerline.
(4) After balancing the tool, reattach it to the control surface per Figure 4-15. Keep the beam
positioned 90° from the control surface hinge line.
(5) Determine balance of control surface by sliding movable weight along the balance beam.
(6) Read the scale when the bubble level has been centered. Multiply by three to determine inch-
lbs. (I.E. - Since the movable weight weighs three pounds, every inch it is moved from the
center of the beam equals three inch-lbs of force.)
Static Balance Limits (In.-Lbs.)
Leading Edge Trailing Edge
Surface Heavy Heavy
Stabi5 to -40
0 to -40 (1)
Ailerons +2 to -20
Rudders 0 to -16 (3)
0 to -13 (2)
0 to -11 (1)
NOTES: (l) PA-32R-300 only.
(2) 1974 Models and up.
(3) PA-32-260 and 300 up to 1974 models.
TABLE IV-II. BALANCE SPECIFICATIONS
(PIR-PPS50015, REV. AE.)
(Maximum Limits - Flight Conditions)