(Was Service Note 1 of AD-718-6.)

Applies to 415-C, -CD and -D Aircraft.

Compliance required at each 100-hour inspection and immediately after each electrical system malfunction.

Check the operation of the voltage regulator by observing the ammeter reading after starting and until the
battery becomes charged. A normal operation would indicate a charging rate up to 11-13 amperes for
periods of time up to 20 minutes after starting. The charging rate should reduce to 2 amperes or less within
2 hours or operation.

( Ercoupe Service Department Memorandum No. 23 covers this same subject.)