1Dk4eXg

P A
12 Power amplifier.
13 Precision approach, suffixes 1/2/3 for Categories
I/II/III.
14 Point Arguello, CA, US.
15 Pad abort.
16 Pilot awareness.
17 The Pathfinder Association [East Molesey KT8
9AF] (UK).
P A Total power available.
P/A Payload/altitude curve (sounding rocket).
Pa 1 Pascal, SI unit of pressure.
2 Polar Atlantic.
P a Action-time average chamber pressure; sometimes
abb. Pc.
pa, p.a. Power amplifier.
PAA 1 Partial air alert.
2 Primary aircraft authorization, or authorized.
3 Passenger-address amplifier.
4 Phased-array antenna.
5 Parts assessment area [maintenance].
PAAG Portable aircraft arresting gear.
PAAMS Principal anti-air missile system.
PA&E Program analysis and evaluation (DoD).
PAASM Precision-attack air-to-surface missile.
PAB Probe and boom.
PABST Primary adhesively bonded structure technology.
PABX Private automatic branch exchange.
PAC 1 Parachute and cable (rocket-launched ‘SAM’,
WW2).
2 Public Accounts Committee (UK, House of
Commons).
3 Programmable armament control.
4 Photometrical airfield calibration.
5 Path attenuation compensation.
6 Pacific Region (ICAO).
7 Penetration-aid[s] carrier.
8 Precision attitude control.
9 Public-address control.
10 Poste aérienne de commande (F).
11 Presidential Advisory Committee (US).
12 Pulley and cable [flight control].
PACA 1 Precision attitude control augmentation;
/IAGSS adds improved air/ground sight system.
2 Programmed adaptive clutter attenuator.
PACAF, Pacaf Pacific Air Forces (USAF).
PACCS Post-attack command and control system.
Pacer Portable aircraft condition evaluation recorder.
PACF Performance assessment and checkout facility
[satellites] (ICAO).
PA/CI Passenger address and cabin [or communications]
interphone [S adds system].
pacing item Task whose time for accomplishment determines
overall time for programme; any major item on
critical path.
PACIS Pilot aid and close-in surveillance.
pack 1 Bag in which parachute is packed. Other authorities
insist that this term includes the complete parachute,
contained inside the * cover.
2 Complete system in demountable package which may
be attached inside or outside aircraft, eg for multi-sensor
reconnaissance, rocket thrust-boost, gun and ammunition,
or air-conditioning.
pad
3 In particular, ECS air-conditioning unit comprising
bootstrap ACM(1) plus air/air heat exchanger.
package 1 See pack (1).
2 Complete offer of international contract covering
either collaborative development or manufacture of
aircraft complete with associated offsets, loans, training
and other attractions, and with agreed share to each
partner of overall effort and/or cost.
3 Complete offer of international contract covering sale
of aircraft with associated offers of offsets, training,
service support, construction of support facilities, etc.
4 Assembly of attack aircraft, tankers, EW jammers,
etc, to carry out a mission.
package aircraft Subject of package (2, 3) deal.
packaged 1 Of petroleum products – eg POL, jet fuel –
contained in drums having capacity not greater than 55
US gal (208.2 l).
2 Of electric generating plant, nuclear reactor, etc,
mounted on skids and transportable thereon as operative
unit.
packaged propellant Rocket motor fed by liquid propellant(s)
sealed in container forming single unit with thrust
chamber.
package gun One mounted in fairing outside aircraft
fuselage, usually fixed.
package programme Timetable for package (2, 3).
packet 1 Single pulse of radar, digitized signal or other
coded EM emission.
2 Prepacked quantity of chaff, either pre-cut or as
roving, for loading into dispenser.
3 Discrete parcel of data sent through multiple network
channels and reassembled at point of delivery.
packet mode TDM mode for signalling, control and
data com. See Pd and Psmc (GPS).
pack hardening Nitriding by heating inside loose pack of
carbonaceous material.
packing Folding a parachute and inserting it within its
pack.
PACS 1 Passive attitude control system, eg gravity
gradient.
2 Pitch-augmentation control system.
PACT 1 Portable automatic calibration tracker.
2 Precision aircraft control technology (CCV).
Pactec Partners in aviation and communications technology,
non-profit humanitarian organization working in
developing countries.
Pacts Parliamentary Advisory Council for Transport
Security (UK, 2002).
PAD 1 Picture assembly device.
2 Point air defence; T adds trainer.
3 Persistent area-denial, or dominance.
4 Precision aerial delivery (USAF), or air drop
(QinetiQ).
5 Packet assembler/disassembler.
6 Primary Awacs display.
7 Pad-abort demonstrator, or demonstration.
8 Probe and drogue.
PADA Phased-array downlink antenna.
pad 1 Platform for launch of vehicle, usually of ballistic
or unmanned nature (colloq. and becoming arch.).
2 Platform for operation of helicopter, esp. on surface
vessel.
3 Attachment face on engine or other energy source for
accessory, usually with central shaft drive.
478