Charging Battery; Starting Through External Power Receptacle With Airplane's Battery Nearly Depleted; Interior Lights; Removal Of Dome Lights In Speaker Panel Assemblies - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
11-52. CHARGING BATTERY. When recharging the battery, it should be removed from the airplane.
(Refer to paragraph 11-50.)
a. Remove cell caps and check fluid level.
b. Begin charging rate of 2 amperes and finishing with 1 ampere.
c. Should the battery boil over, clean per paragraph 11-51.
d.
When battery is completely charged, reinstall in the airplane.
11-53. STARTING THROUGH EXTERNAL POWER RECEPTACLE WITH AIRPLANE'S BATTERY
NEARLY DEPLETED.
NOTE
Should the hydrometer reading indicate less than 1190, the
battery should be removed and recharged or replaced.
a. When using a 24 volt battery for external power starting and the airplane's battery is nearly
depleted, the following procedure should be used:
1. Disconnect the airplane's battery at the negative terminal to prevent excessive loading of the
external starting battery.
2. Check that all of the airplane's electrical equipment and master switch are turned off.
3. Connect the external battery to the external power receptacle and start RIGHT ENGINE
ONLY using normal starting procedures.
4. Remove external battery and then reconnect airplane's battery at the negative terminal.
5. Turn master switch on and check ammeter for battery charging current.
b. When starting with a power cart and the airplane's battery is nearly depleted, the procedure in
step (a) need not be followed. The capacity of a power cart is sufficient to start an aircraft with a low
battery. If a six volt battery is available, it can be connected in series with the 24 volt external battery to
supply 30 volts for starting. In this case, use the same starting procedure as used with a power cart.
CAUTION
In the event it becomes necessary to start the engine through the
external power receptacle, due to a low battery condition,
ascertain that aircraft battery is on the charging line by monitoring
the battery ammeter (charging current will be high). Do not take
off until charging current falls below 20 amps.
Never use a 12 or 24 volt battery connected in series. in place of a
six volt battery, since electrical damage may result.
11-54. INTERIOR LIGHTS.
11-55. REMOVAL OF DOME LIGHTS IN SPEAKER PANEL ASSEMBLIES. The lamp is located in the
forward section of the overhead speaker panel. It is necessary to remove the complete panel assembly from
the headliner before the lamp can be changed.
a. Remove the attachment screws and lower the speaker panel assembly from the headliner. Two
control knobs must also be removed if the forward speaker panel is being removed.
b. Remove the screws holding the light assembly to the panel and remove light assembly.
c. The lamp can now be replaced using proper lamp number.
Reissued: 9/23/80
ELECTRICAL SYSTEM
3D20