AMD 601XL / 601XLI / 650LS / 650LSi SLSA MAINTENANCE MANUAL
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SERVICING THE BATTERY
The battery should be checked for proper fluid level (not required when using a SEALED
LEAD ACID battery), but must not be filled above the baffle plates. A hydrometer check
should be performed to determine the specific gravity of the electrolyte (1.268 standard,
and 1.285 for better cold-weather cranking capacity). All connections must be clean and
tight. If battery is not up to normal charge, recharge starting with a charging rate of 4
amperes and finishing with 2 amperes. The normal charged battery will indicate 11.5
Volts or more.
VOLTMETER - OPTIONAL
The voltmeter indicates the level of the battery (11.5 or more volts, engine off and master
on).
AMPMETER - OPTIONAL
The amp meter is mounted in series with the battery and bus bar(s). It shows in (positive)
or out (negative) current to/from the battery.
With a charged battery, the ammeter should read near zero when the engine is running and
has recharged (3 to 5 minutes) the battery previously discharged by the starter current, and
no other loads are applied. (lights, radios, etc....off)
STALL WARNING - OPTIONAL
The stall warning system (optional) consists of an electric buzzer located behind the pilot
on the cabin ceiling, and activated by the airflow closing the contact on the right wing
leading edge when the aircraft operates at a high angle of attack near the stall of the wing.
If the buzzer does not operate when lifting the contact: check the contact, the buzzer and
the breaker for proper operation.
The contact element on the wing leading edge is replaced by removing the blind rivets and
pulling it out. Reinstall with blind rivets at the same location to obtain the warning
(buzzer) 5 kts above the stall speed.
July 09
10.2
