Piper Navajo PA-31 Service Manual page 154

PIPER NAVAJO SERVICE MANUAL
158
159A
ELEVATOR ASSEMBLIES
PRIMARY LOCATION
4014001
40140-28
40140-29
Figure 4-17. Elevator Trim Weight Installation
2.
Elevators P/N 43757-00, -01, -17, -18 and 54232-02, -03 on PA-31-300 and PA-31-310
aircraft (without wing lockers), proceed as follows:
(a)
Remove the elevator balance leading edge by removing attaching screws.
(b) A weight attachment
point is provided on the balance leading edge channel
approximately 2.88 inches inboard from the tip. (Refer to Figure 4-18.) Weights are
installed, not to exceed two per anchor nut, with the proper length AN3 bolts. Should
it be necessary to install an additional third and fourth weight (per elevator), a second
attachment
point is provided at approximately 5.25 inches inboard from the tip.
Distribute the weights evenly between both elevators. (Should the second attachment
anchor nut not be provided, it may be installed per instructions given in Paragraph
4-94.)
(c) Install elevator balance leading edge with attaching screws.
3.
Elevators P/N 43757-00, -01, -17 and -18 on PA-31-310 airplanes (with wing
lockers) use
special balance weights. part number 4243-00 (one on each side) and trim weights43332-00
(maximum of one
per bolt) as required to obtain the correct balance.
(a) Remove the elevator balance leading edge by removing attaching screws.
(b) Attach the trim weights using the balance weight attachment bolts (8 max., I
per bolt).
Use the proper length AN3 bolts to accommodate the trim weights. (Refer to Figure
4-19.)
(c)
The weights should be distributed evenly between both elevators.
(d) Install the elevator balance leading edge with attaching screws.
4. Elevators P/N 54232-02 and -03 used on PA-31-325 aircraft (wing lockers
standard
equipment) use special balance weights P/N 54196-02 and trim weights 43332-00
to obtain correct balance.
(a)
Remove the elevator balance leading edge by removing attaching screws.
(b) Attach the trim weights using the balance weight attaching bolts (6 max.,
2 per bolt).
Use the proper length AN3 bolts to accommodate the trim weights. (Refer
to Figure
4-19.)
(c) The trim weights should be evenly distributed between both elevators.
(d) Install the elevator balance leading edge with attaching screws.
i.
With elevator completely reassembled, recheck balance per specifications given in
Table IV-I.
j. Reinstall elevator per instructions given in Paragraph 4-29.
Revised: 3/2/84
STRUCTURES
1G10