| Acronym |
Definition |
| PAPI |
Precision Approach Path Indicator. |
| PAR |
Precision Approach Radar. |
| Pax |
Passengers. |
| PFA |
Popular Flying Association, the UK homebuilt and antique aircraft organisation. |
| PIC |
Pilot-In-Command (also styled P1). |
| PINS |
Pipeline Inspection Notification System. |
| PIO |
Pilot-Induced Oscillation. An undulating flight path brought about by over-controlling. |
| PLN |
Flight-Plan. |
| PMS |
Performance Management System. |
| POB |
Persons on board. |
| SOB |
Souls On Board. |
| POC |
Proof-Of-Concept. |
| POH |
Pilot's Operating Handbook. |
| Pooley's |
Annually-published flight guide to United Kingdom and Ireland, named after its creator and publisher Bob Pooley. |
| PPL |
Private Pilot's Licence. |
| PPL(H) |
Private Pilot's Licence for Helicopters. |
| PPL(SLMG) |
Private Pilot's Licence.for Self-Launched Motor Gliders. |
| PPO |
Prior Permission Only. |
| PNR |
Prior Notice Required |
| PPR |
Prior Permission Required. |
| PROB |
Probability Percentage, term used in Met reports. |
| Procedure Turn |
Maneuver which reverses the direction of an aircraft's flight during an instrument approach procedure to enable it to intercept the final approach course. |
| PSI |
Pounds Per Square Inch, a measurement of pressure. |
| PTT |
Press-To-Transmit (switch) on an aircraft;s control wheel or stick enabling the pilot to make RT transmission via a headset microphone. |
| Purple Airspace |
Special temporary airways created for flights by certain members of the royal family. |
