There are three inspections/test intervals pre-
scribed for this type of radio. (They are also
prescribed for the AN/PRC-90.) The first daily/
preflight is performed at the squadron level by the
aircrewrnan. It is to be performed daily or prior to
each flight. It consists of a basic operational check
using an AN/PRM-32 radio tester or with the aid of
a known good radio. Prior to testing the emergency
radio, you should call flight operations to inform
them that you are going to test a radio.
Every 90 days the radio must be inspected by
the PR at the organizational level. It is best to
make this inspection in conjunction with the
inspection performed on the aircrewmens
personal survival equipment.
The last of the three inspections is performed
at the intermediate level (AIMD). This inspection
is performed every 180 days by personnel in the
The testing procedures for all three inspections
are outlined in NAVAIR 16-30PRC 90-2 for the
The Mallory battery will require frequent
inspections to ensure that it hasnt lost any of its
operating life. When operating in a high-
temperature area, the inspection should be
conducted at least every 30 days. The service and
shelf life of the battery expires 36 months from
the date of manufacture. When the battery fails
to produce the power for the radio to operate at
maximum operating range, you must replace it.
Any battery that shows evidence of a swelling,
chipped, or cracked surface, or moisture must be
condemned and a new battery installed.
AN/PRC-90 RADIO SET
The AN/PRC-90 (fig. 5-8) radio set is a dual
channel, battery-powered, personal emergency
rescue device used principally for two-day voice
or MCW (modulated continuous wave, which is
used to send Morse code signals) communications
between a downed aircrewman and a rescue air-
craft. The radio transmits either voice. tone
AN/PRC-90 radio and in
63-1 for the AN/PRC-63.
(MCW), or swept-frequency homing beacon
Figure 5-8.AN/PRC-90 controls and indicators.