OVHT Overheat
OVTQ Overtorque
P Pitch
PA Passenger Address
PA Pubblic Address
PAX Passengers
PCM Power Control Module
PDP Power Distribution Panel
PERF Performance
PFD Primary Flight Display
PI Power Index
PLT Pilot
PMA Permanent Magnent Alternator
POSN Position
P/N Part Number
PPH Pounds per Hour
PRAIM Predictive RAIM
PREV Previous
PRI Primary
PROG Progress
PRV Preview; Pressure Relief Valve
PSU Passenger Service Unit
PTT Press to Talk
PTT Press to Transmit
PWR Power
QRH Quick Reference Handbook
R Right
R Roll
RA Rectract Actuator
RAD Radio
RAD ALT Radio Altitude / Radio Altimeter
RAIM Receiver Autonomous Integrity Monitor
RB Rotor Brake
RBA Rotor Brake Assembly
RBAA Rotor Brake Actuation Assembly
RBCL Rotor Brake Control Lever
RBCM Rotor Brake Control Module
RBPI Rotor Brake Pressure Indicator
RBRB Rotor Brake Relays Box
RCP Reversion Control Panel
RCRD Record
RDR Radar
REC Received
REC Record
REL Release
RETR Retract / Retraction
RFM Rotorcraft Flight Manual
RH Right Hand
RHT Radar Altitude Hold
RIC Remote Instrument Controller
RICP Remote Instrument Control Panel (same as RIC)