TM 1-1500-204-23-4
Figure 3-9. Inverter
(4)
Replacement
criteria.
Inverter
replacement criteria are as follows:
·
Replace rotary inverters when
any unusual bearing or gear
noises
are
detected
during
operation.
·
Replace rotary inverters when
commutator bars are rough,
scored, pitted, loose, high, or
worn to the depth of insulating
mica between bars.
·
Replace rotary inverter brushes
that
are
cracked,
broken,
chipped,
unevenly
worn,
or
worn beyond maximum wearing
depth slot.
·
Replace static inverters when
electrical
connectors
have
broken
pins
or
cracked
connector inserts.
·
Replace static inverters that
have cracked cases.
·
Replace static inverters that fail
to operate properly.
NOTE
Remove components from aircraft
when replacing brushes.
d. Starters. Army aircraft are started by a device
called a starter. The starter develops large amounts of
mechanical energy, causing the engine to rotate.
(1) Types. The following paragraphs name
various starters used with turbine engines. Turbine
engine starters. Turbine engines use air-turbine
(pneumatic) or electric starters. The air-turbine starter is
becoming the most common type.
(2)
Inspection.
General
inspection
procedures for starters removed from the aircraft and
starters installed on the aircraft are described in the
following paragraphs.
3-15
