1Dk4eXg

PTCHY
4 Passive thermal control.
5 Personnel and Training Command (RAF).
6 Personal Technical Certificate (NATS).
7 Pack temperature controller.
PTCHY Patchy.
PTCS Portable tracking and control station.
PTCV Primary temperature control valve.
PTD 1 Provisional technical document.
2 Performance test domain.
PTDS Persistent-threat detection system.
PTE Performance test engine.
PTEH Per thousand engine hours.
pterodactyl Class of aeroplanes without horizontal tail.
PTF Permit to fly.
PTFCE, ptfce Polytrifluorochlorethylene.
ptfe Polytetrafluoroethylene.
PTH Path.
PTI Packet-type identifier.
PTID Programmable tactical information display.
PTIR Precision tracking and illuminating radar.
PTIT Power-turbine inlet temperature.
PTK New hollow-charge bomblet (USSR).
PTL 1 Primary technical leaflet.
2 Prioritized target list.
PTLY Partly.
PTM 1 Pulse-time modulation.
2 Pressure transducer module.
3 Peripheral transition module (SBC).
4 Power [and] thermal management.
PTMS Power and thermal management system.
PTMU Pressure/temperature measurement unit.
PTN 1 Procedure turn.
2 Position.
3 Public telephone network.
4 Pattern [S plural].
5 Portion [S plural].
PTO 1 Power take-off (shaft output).
2 Permeability tuned oscillator.
3 Participating test organization.
4 Overhaul by the customer (R).
5 Part-time operation.
6 Pacific theatre of operations (WW2).
7 Personal ticket office (software).
P to F 1 Permit to fly.
2 Permission to fire.
P-tots Portable transparency optical test system (for
rainbowing).
PTP 1 Paper-tape punch.
2 Programmable touch panel.
3 Programming and test panel (CIDS).
4 Purchase to payment (electronic delivery).
5 Point to point (scheduled US carriers).
PTPS Passive thermal protection system.
Pt–Ps The difference between pitot and static pressure.
PTR 1 Part-throttle reheat.
2 Paper-tape reader.
3 Power-turbine rotor.
4 Peak/trough ratio.
5 Production test requirements.
6 Program Trouble Report (Stars).
PTRP Propfan technology readiness programme.
PTRS Program tracking and reporting system (ATOS).
PTS 1 Pilot Training Squadron (US).
2 Photogrammetric target system.
pull
3 Parachute Training School.
4 Polar track structure.
5 Pre-training screen.
6 Problem-tracking system.
PTSA Prior to sample-approval.
PTSD Production test specification document.
PtSi Platinum/silicide.
PTSN Public telephone switching network.
PTT 1 Part-task trainer (simulator).
2 Post, telegraph, telephone (many European nations).
3 Press, or push, to transmit, or talk, or test.
PTTEM Preliminary tactical technical economical
requirement, following UTTEM and leading to prototype(s)
(Sweden).
PTTS Pressure/temperature test set.
PTU 1 Power transfer unit; transmits power but not
fluid between hydraulic systems. Can provide vital backup
following failure of an engine, esp. left engine.
2 Personal transport unit.
PTV 1 Propulsion technology validation.
2 Propulsion test vehicle.
PTW Precision targeting workstation.
P2P See PTP(4).
Pty Proprietary [company constitution, RSA].
PU, p.u. 1 Pick-up.
2 Propellant-utilization system.
3 Physical unit (SNA).
4 Polyurethane.
5 See several pop-up entries.
Pu Plutonium.
PUAG Purpose-use arresting gear.
Pub Publication.
public-address system, PA Interphone voice circuit used
by captain or cabin crew to address passengers.
public aircraft 1 Not public, ie used exclusively in
government service (US).
2 Used by the public, including for hire or reward [see
Public Service] (UK).
public dividend capital Strange term for direct gift of
taxpayer’s money to national airline (UK).
public safety zone Area adjacent to end of runway where
development, such as housing, is restricted.
Public Service aircraft Usually helicopters operated by
military, police, air ambulance, and similar authorities,
principally for disaster relief.
published route One for which an IFR altitude has been
published.
puck Replacement pad for plate or disc brake.
pucker Local buckling of sheet metal in compression, eg
on flange around inside of bend.
PUD Power unit de-icing (CAA).
puddle welding Blind attachment [e.g., of stringers to
skin, or of sheet to a core] by Argon-arc torch having
access to one side of the workpiece only.
PUDT Portable user data terminal.
puff pipe Pipe taking bleed air to an RCS control valve
in jet-lift aircraft. Hence puffer jet (colloq.).
Pugs Propellant utilization and gauging system
(NASA).
pukka True, thus * Gen = reliable info (from
Hindustani, RAF WW2).
pull 1 To operate, eg to * spoilers (colloq.).
2 To engage arrester wire.
525