R1224 Regulator
Installation Instruction
12-1001 24-30-01
Rev. M: 01 Dec. 2021 Page: 4-1
© 2021 - Hartzell Engine Technologies - All rights reserved
SECTION 4 - CHECK
4.1 General
A. This section denes the various checks and inspections needed to assure reliable and safe
operation of the alternator while in service. They are listed in hours time in service (TIS) or in
calendar time, whichever is applicable and are the rst to occur when oered a choice. Some
maintenance is one time initial and others are recurring.
B. HET recommended maintenance and checks including TIS may be superseded by the aircraft or
engine manufacturer’s established time limits and schedules based on experience and/or unique
requirements under engine or airframe Type Certicate.
4.2 Inspection Checks
100 Hours TIS & each 100 hours thereafter. (or each annual/event, the first to occur)
(1) Check voltage level output. If the voltage level does not meet the Aircraft Manufacturer’s
requirement, adjust the voltage as per section 6-1 step 9.
(2) Inspect Regulator and wiring for secure electrical connections and physical connection to the air
frame.
(3) Check connection between terminal 1 (GND) and airframe ground is found to be less than 0.1
OHM.
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