Aviation Maintenance Terms beginning with R

r-t

Receiver-Transmitter

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RA

Radio Altimeter; Radio Altitude

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RAD

Radio

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RAIM

Receiver Autonomous Integrity Monitoring

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RAIND

Radio Altimeter Indicator

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RAM

Random-Access Memory

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RART

Radio Altimeter Receiver-Transmitter

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RAT

Ram Air Turbine

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Rc

Radius of containment

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RCCB

Remote-Control Circuit Breaker

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RCL

Recall

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RCVR

Receiver

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RCVR/XMTR

Receiver/Transmitter

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RDF

Radio direction finding.

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RDMI

Radio Distance Magnetic Indicator

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RF (rf)

Radio Frequency

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RF energy

Electromagnetic energy with a frequency high enough to radiate from any conductor through which it is flowing.

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RFI

Radio-Frequency Interference

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RFM

Rotorcraft Flight Manual

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RFMS

Rotorcraft Flight Manual Supplement

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RLS

Remote Light Sensor

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RMI

Radio magnetic indicator.

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RNAV

Area navigation.

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RPM

Revolutions per minute. A measure of rotational speed. One rpm is one revolution made in one minute.

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RTV

Room Temperature Vulcanizing

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RVSM

Reduced Vertical Separation Minimum

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