ABBREVATION SIGNIFICATION -------------------------------------------------------------------------------MMO Maximum Operating Mach
MMR Multi Mode Receiver
MODLTR Modulator
MON Monitor, Monitored
MONG Monitoring
MORA Minimum Off Route Altitude
MOT Motor, Motorized
MPD Maintenance Planning Document
MSA Minimum Safe Altitude
MSB Most Significant Bit
MSG Message
MSL Mean Sea Level
MSU Mode Selector Unit (IRS)
MSW Microswitch
MTBF Mean Time Between Failure
MTBUR Mean Time Between Unscheduled Removals
MTG Mounting
MTO Maximum Take-Off
MTOGW Maximum Takeoff Gross Weight
MU Management Unit
MUX Multiplex, Multiplexer
MVT Movement
MZFW Maximum Design Zero Fuel Weight
N Normal, North
N/A Not Applicable
EFF : ALL
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ABBREVATION SIGNIFICATION -------------------------------------------------------------------------------N/P Next Page
N/W Nose Wheel N/WS Nose Wheel Steering NAC Nacelle NAS Navy and Army Standard NAV Navigation NAVAID Navigation Aid NBPT No Break Power Transfer NC Normally Closed NCD No Computed Data ND Navigation Display NDB Non-Directional Beacon NEG Negative NLG Nose Landing Gear NMI Non Maskable Interrupt No Number NO Normally Open NO Normal Operation in SSM NORM Normal NS No Smoking NUM Numerical NVM Non-Volatile Memory N1 Low Pressure Rotor Speed N2 High Pressure Rotor Speed O Open
EFF : ALL
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ABBREVATION SIGNIFICATION -------------------------------------------------------------------------------O/P Output
OAT Outside Air Temperature
OBRM On Board Replaceable Module
OC Open Circuit
OC Overcurrent
OF Overfrequency
OFST Offset
OGV Outlet Guide Vane
OHU Optical Head Unit
OIT Oil Inlet Temperature
OK Correct
OMS Onboard Maintenance System
OOT Oil Outlet Temperature
OP Operational
OPP Opposite
OPS Operation
OPT Optimum
OPV Overpressure Valve
OUTBD Outboard
OVBD Overboard
OVHD Overhead
OVHT Overheat
OVLD Overload
OVRD Override
OVSP Overspeed
EFF : ALL
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ABBREVATION SIGNIFICATION -------------------------------------------------------------------------------OXY Oxygen
P/B Pushbutton
P/BSW Pushbutton Switch
PA Passenger Address
PATS Passenger Air-to-Ground Telephone System
PAX Passenger
PC Pack Controller
PCB Printed Circuit Board
PCM Pulse Code Modulation
PCU Passenger Control Unit
PCU Power Control Unit
PED Pedestal
PERF Performance
PES Passenger Entertainment (System)
PF Power Factor
PFD Primary Flight Display
PH Phase
PHC Probe Heat Computer
PIU Passenger Information Unit
PMA Permanent Magnet Alternator
PMG Permanent Magnet Generator
PN Part Number
PNL Panel
POB Pressure-Off Brake
POR Point of Regulation
EFF : ALL
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ABBREVATION SIGNIFICATION -------------------------------------------------------------------------------POS Position
POT Potentiometer
PPOS Present Position
PR Power Ready Relay
PRAM Prerecorded Announcement and Music
PREAMP Preamplifier
PRED Prediction
PRESEL Preselector/Preselection
PRESS Pressure, Pressurization, Pressurize
PREV Previous
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