TWIN COMANCHE C/R
few seconds with the selector handle on the main and then move to the auxiliary cell Repeat the process
for the opposite side.
b. To drain the lines from the tip tanks, move the fuel selector handle to the auxiliary fuel cell
position; turn the master switch on; and the electrical selector switch, located on the forward side of the
selector panel, to the tip tank position. Open the drain valve to allow the line to drain. Repeat the process
for the opposite tank.
*
DRAINING FUEL SYSTEM
The bulk of the fuel may be drained from the fuel cells and tip tanks by the use of a siphon hose
placed in the cell or tank through the filer neck. In addition, the tip tank may be drained by inserting a
dowel in the plug at the bottom of the tank and pushing up or by removing the plug itself. The remainder
of the fuel may be drained by opening the drain valve in each fuel selector bowl.
TIRE INFLATION
For maximum service from the tires, keep them inflated to the proper pressure of 42 psi. Interchange
the tires periodically for even wear. AU wheels and tires are balanced before original installation, and the
relationship of tire, tube and wheel should be maintained upon reinstallation. In the installation of new
components, it may be necessary to rebalance the wheels with the tires mounted. Out of balance wheels can
cause extreme vibration in the landing gear.
BATTERY SERVICE
Access to the 12-volt 35 ampere hour battery is gained by removing the top panel of the fuselage nose
section. The stainless steel battery container has a plastic drain tube which is normally closed off with a
clamp that should be opened every 30 days to drain off any accumulation of fluid.
The battery fluid level must not be brought above the baffle plates. It should be checked every 30
days to determine that the fluid level is proper and the connections are tight and free of corrosion.
If the battery is not properly charged, recharge it starting with a rate of 4 amperes and finishing with a
rate of 2 amperes. Quick charges are not recommended.
The external power receptacle, if installed, is located on the left side of the nose section. Be sure that
master switch is off while inserting or removing a plug at this receptacle.
PAGE 8
HANDLING AND SERVICING
ISSUED: June 1,197O
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