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P N ( 1 ) Pa rt Num ber
( 2 ) Pseudo Noi se
P N C S Perform a nce Naviga t ion Com p u ter Syste m
P N D P ri m a ry Naviga t ion Display
P N E U P n e um a t ic
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P S E U P roxi m i ty Se n sor Electron ic Un i t
P S L / P S A P ro blem Sta te ment Langu age / P ro blem Sta te me n t
An a lyzer
P S M Power Supply Modules
P S N Packet Swi tch i ng Ne twor k
P S P L P referred Sta n d a rd Pa rts List
P S R P ri m a ry Surve i l la nce Radar.The pa rt of the ATC
system that determ i n es the ra nge and azi mu th of an
a i rc raft in a con trol led air space.
P S S P roxi m i ty Se n sor Syste m
P S U Pa sse nger Service Un i t
P T To tal Press u re
P T D Perform a nce Test Dom a i n
P S E Packet Swi tch i ng Exch a nge
P S T N P u bl ic Swi tch ed Te le p h one Ne twor k
P T H Pa th
P T I Packet Type Id e n t i fier
P T M Peri p h eral Tra n s i t ion Module (I/O interface for SBC )
P T R P roduct ion Test Requi re me n ts
P T S P ro blem Tracki ng Syste m
P T S D P roduct ion Test Spec i fic a t ion Docume n t
P T T ( 1 ) Post ,Te le p h one and Te legra p h
( 2 ) P ush To Ta l k. A l so refers to the swi tch i ng sign a l
that enables the tra n s m i t ter.
( 3 ) P ush To Test
P T U Power Tra n sfer Un i t
P V D Plan View Display
P V Pa ra me ter Va l ue
P V C Permanent Vi rtual Circui t
P V T Pos i t ion ,Ve loc i ty,Ti me
P R E S S P ress u re
P r e s s u r e The altitude mea s u red above sta n d a rd press u re leve l .
A l t i t u d e Ba sed on the re la t ionship of press u re and altitude
wi th res pect to a sta n d a rd atm os p h ere.
P R E V P revio us
P r e v e n t i v e A resol u t ion advi sory that instructs the pi lot to avoid
A d v i s o r y certain devia t ions from cu rrent vert ical ra te. ( TCA S )
P R F P ul se Re pe t i t ion Freque ncy
P R I ( 1 ) P ri m a ry
( 2 ) P ri m a ry Rate In terface
P R M ( 1 ) P rec i s ion Runway Mon i tori ng
( 2 ) P ro posed Rule Maki ng
P R N Pseudo Random Noi se
P R O C P rocedu re
P R O F P rofi le
P R O G P rogress Page on MC DU
P R O M P rogra m m a ble ROM
P R- N AV P rec i s ion Area Naviga t ion
P r o t o c o l A set of rules for the format and con tent of messages
be tween com mun ic a t i ng processes.
P R OV P rovi s ion a l
P R OX P roxi m i ty
P R S OV P ress u re Regula t i ng and Shutoff Va lve
P / R S T P ress To Rese t
P R T R P ri n ter
P S Power Supply
P S A Power Supply Asse m bly
P S A S P ri m a ry Sta bi l i ty Augme n ta t ion Syste m
P S D Port Shari ng Device
P S D N Packet Swi tch ed Da ta Ne twor k
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R A A Regional Ai rline Assoc ia t ion
Rabbit Tr a c k s R a b bit Tracks, or run n i ng ra b bi ts, refer to th e
di st i nct ive di s play produced by anoth er (alien ra d a r )
radar system tra n s m i ss ion .
R A D ( 1 ) R a dia l
( 2 ) R a dio
( 3 ) R a pid A p pl ic a t ion Deve lo pme n t
R a d a r R a dio De tect i ng and Rangi ng. A system that mea s u res
di sta nce and bea ri ng to an object .
Radar Mile The time interval (approxi m a te ly 12.359 mic rosec on ds )
requi red for ra dio waves to travel one nau t ical mile
and re t u rn (to tal of 2 nm i ).
R a d i a l A line of di rect ion goi ng out from a VOR sta t ion
mea s u red as a bea ri ng wi th res pect to magn e t ic
n orth .
R a d o m e The ra d ome is the pro tect ive cover on the airc raft
n ose that fi ts over the wea th er radar system ante n n a .
The ra d ome is tra n s pa rent at radar freque nc ies.
R A F Requi re me n ts An a lysis Fold er
R A I R a dio A l t i me ter In dic a tor
R A I M Rece iver Au ton om o us In tegri ty Mon i tori ng
R A LT R a dio A l t i me ter (also RA , RA DA LT, LRA , LR RA )
R A M R a n d om Access Me m ory. Ge n era l ly used to desc ri be
rea d / wri te integra ted circuit me m ory.
R A P P S Re m o te Area Prec i s ion Pos i t ion i ng Syste m
R A S Row Ad dress Stro be
R AT RAM Air Te m pera t u re is the te m pera t u re of the air
e n teri ng an air sc oop inle t . It is a factor in engi n e
perform a nce.
R / C R a te of Climb
R-C Res i stor- C a pac i tor networ k
R-C & W R ack Con n ectors and Wi ri ng
R C AG Re m o te Center Ai r / G ro und Sta t ion
P W M P ul se -Width Modula t ion
P W R Power
Q A R Q uick Access Rec ord er
Q C Q u a l i ty Con trol
Q E C Q u a dra n tral Error Corrector
Q F E A me th od of se t t i ng the altime ter to com pe n sa te for
ch a nges in ba rome tric press u re and runway eleva t ion .
　
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