Rockwell Commander 112 - Battery

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ROCKWELL
COMMANDER
112/B/TC/TCA
MAINTENANCE MANUAL
SECTION II
SERVICING
AND INSPECTION
INSPECTION
~IRFRAME
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
II.
12.
13.
14.
Battery electrolyte level, cables, and battery
box.
Aircraft exterior surfaces.
Windshield and windows.
Safety belts, shoulder harnesses.
Exterior lights, gear warning system.
Interior condition.
Lubricate all fittings.
Aircraft structure.
Electrical wiring condition.
Control system pulleys, cables and turnbuckles.
Ventilation system and controls.
Pitot-static system.
Stall warning system.
Antenna installations.
50
HRS
INTERVAL
100
HRS
500
HRS
AS
REQtD
15.
Flap system, tracks, hinge fittings, position switches,
gear warning-flap -actuated switch, flap
16.
17.
18.
19.
20.
motor and transmission.
Rudder controls.
Vacuum system filter.
Control decals and labeling.
Rudder trim assembly.
Inspect aft end of 44222-3 rib of the vertical fin
for cracks in area of lightening hole and radius
of corners. If crack is found, remove upper fin
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assembly and rework per Service Bulletin No. SB-112-56 .
I
Figure 2-8. I nspection I ntervals Chart (Sheet 2 of 2)
31 psi for the Model 112 and 50 psi for Models 112B/
TC/TCA and main wheel tire pressure at 29 psi for
the Model 112 and 38 psi for the Models 112B/TC/TCA.
Tire pressure will change approximately one pound
for each five degrees of temperature change (5
0
F).
The wheels and tires are balanced assemblies and
the red dot on tire must align with yellow mark on
tube. If tires are suspected of being out of balance,
they may be balanced on automotive type balanCing
equipment. Clean tires with soap and water. If air-
craft is out of service, rotate tires every seven days
to prevent flat spots from developing.
BRAKE BLEEDING. Brake bleeding should be per-
formed when air is suspected of being entrapped in
brake lines. See Section VI for brake bleeding proce-
dures.
BATTERY
BATTERY SERVICING. The 12-volt battery is in-
stalled in the left aft section of the tailcone. Battery
servicing involves adding distilled water to maintain
electrolyte level up to the horizontal baffle plate or
split ring at the bottom of the filler openings, check-
ing cable connections and neutralizing or cleaning off
any spilled electrolyte or corrosion. Use bicarbonate
of soda (baking soda) and clean water to neutralize
corrosion. Follow with a thorough flushing with clean
Change 4
water and wipe dry.
Do not allow baking soda to enter battery
filler openings, as it will neutralize elec-
trolyte and may permanently damage battery.
Clean cable and terminal connections with a wire
brush, then coat with petroleum jelly after connecting
to minimize corrosion. Check battery electrolyte
level at least each 50 hour s, more often in hot weather.
Check the electrolyte specific gravity for a reading of
1. 250 to 1. 280. A recharge should be made if a spe-
cific gravity of 1.250 or lower is indicated. Refer to
Electrical, Section X, for recharging procedures.
Also, during service checks, inspect the condition of
the battery box and remove any accumulation of dirt
or c orro sion.
Assure proper installation of angle
stiffener when reinstalling battery
cover.
2-13
Copyright Commander Owners Group 2013 All Rights Reserved
**unofficial copy**