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Function and Use of Operating Controls
Operating Procedure

Aircrew Survival Equipmentman 2 - Aviation theories and other practices
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Inspections 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 aircrewmen’s 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 avionics rating. The testing procedures for all three inspections are outlined in NAVAIR 16-30PRC 90-2 for the Battery Replacement The Mallory battery will require frequent inspections to ensure that it hasn’t 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. NAVAIR 16-30PRC (MCW), or swept-frequency homing beacon 239.438 Figure 5-8.—AN/PRC-90 controls and indicators. 5-7







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