Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 436 / 1956

PAGE 20
Feb 28/07
2I14
24-30-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
C. Installation
(1) Install the vent hose that connects through the firewall.
(2) Place the battery into the compartment.
(3) Place battery manifold cover on battery and install battery hold down bolts.
(4) Install vent hose at battery manifold.
(5) Push rubber battery terminal boots back on, tighten wing nuts and connect battery cables.
(6) Install battery access plate to floor of forward baggage compartment.
D. Cleaning
(1) Battery
(a) Remove all accumulated contamination from the battery exterior with a stiff bristle brush.
(Do not use a metal brush or abrasive materials.) Wipe exterior of battery and interior of
manifold, including manifold top cover, with a cloth saturated with a solution of
bicarbonate of soda mixed - one part soda to twenty parts of water. (Check that vent caps
are sealed in place - At no time must these vents caps be removed.)
(b) Wash entire battery with clear water and dry thoroughly.
(c) Wash down the battery support and floor area, hold down supports, connectors and cable
ends with a soda solution followed by clear water. Dry entire area and component parts
thoroughly. Apply fresh acid resistant paint if required.
E. Charging - (Gill Model G-250S)
CAUTION: WEAR EYE PROTECTION WHEN CHARGING A BATTERY - DO NOT TAKE
CHANCES. MAKE SURE THE CHARGING AREA IS WELL VENTILATED. IF
CENTRAL AIR CONDITIONING IS USED, THE BATTERY CHARGING AREA
SHOULD BE VENTED TO THE OUTSIDE AIR TO PREVENT HYDROGEN GASSES
FROM BEING CIRCULATED THROUGHOUT THE BUILDING.
The National Electric Code forbids charging batteries installed in aircraft or within 10 feet of fuel
tank areas. The battery must be removed from the aircraft for charging. Further, an aircraft battery
should not be allowed to deteriorate to the point where safety of flight is jeopardized. The batteries
emergency capacity should be sufficient to power the essential bus for a minimum of thirty minutes.
Check battery voltage and date of manufacture prior to installation. If the open circuit voltage is less
than 25.0 volts, or if 90 days has passed since date of manufacture, the battery should be charged
before placing into service.
(1) If the battery voltage is below 25.0 volts, the battery should be recharged.
(2) Remove the battery from the aircraft and recharge in a well ventilated area. To avoid water loss
and possible overcharge, the manufacturer recommends a constant potential (tapering)
charge.
NOTE: Non-maintainable means that this type of battery cannot be opened to add fluid.
Periodic maintenance is still required in the form of boost charging if the battery
becomes discharged.
(3) CONSTANT POTENTIAL (TAPERING) CHARGE: Charge the battery at 28.2 to 28.6 volts for a
period of 24 hours. Inrush current can be as high as 100 amps, provided voltage does not
exceed as mentioned above.
(4) CONSTANT CURRENT CHARGE: Charge the battery at rate listed (see Chart 7) for a period
of 10 to 13 hours, unless otherwise stated, or until the battery voltage stabilizes for three (3)
consecutive hours, or drops.