O  P  R  I-7  Night vision protection ..............................................17-23 Nondirectional beacon (NDB) .....................................3-13 Notices to Airmen (NOTAM)......................................13-5 FDC NOTAMs .........................................................1-12 NOTAM composition ..............................................1-13 NOTAM (D) information.........................................1-12 Obstruction lights.......................................................14-19 Dual lighting...........................................................14-19 High intensity white obstruction lights ..................14-19 Red obstruction lights.............................................14-19 Obstructions on wind ...................................................12-8 Oil Systems ..................................................................7-16 Operational incidents (OI) .........................................14-31 Optical illusions .........................................................17-10 Original equipment manufacturer (OEM) .....................7-4 Outside air temperature (OAT) gauge ............... 7-11, 8-28 Oxygen masks..............................................................7-38 Oxygen systems ...........................................................7-37 Continuous-flow oxygen system ..............................7-38 Diluter-demand oxygen systems ..............................7-38 Electrical pulse-demand oxygen system ..................7-38 Pressure-demand oxygen systems ............................7-38 Parachute jump aircraft operations ..............................15-6 Parachute jumps .........................................................15-11 Parallels........................................................................16-3 PAVE checklist..............................................................2-8 Payload.........................................................................10-5 Pennants .....................................................................12-12 Perceive, Process, Perform (3P)...................................2-15 Forming good safety habits ......................................2-18 Performance .................................................................11-5 Performance charts.....................................................11-19 Performance data .........................................................11-1 Performance instruments .............................................3-12 P factor ............................................................... 5-30, 5-32 Photopic vision...........................................................17-20 Pilotage ......................................................................16-12 Pilot certifications ........................................................1-16 Airline transport pilot ...............................................1-18 Commercial pilot......................................................1-18 Private pilot ..............................................................1-17 Recreational pilot .....................................................1-17 Sport pilot .................................................................1-16 Pilot deviations...........................................................14-31 Pilot’s operating handbook (POH)..................... 9-1, 16-17 Radar observations.......................................................13-3 Radar traffic advisories ..............................................14-26 Radio communications...............................................14-22 Radio equipment ........................................................14-22 Radio magnetic indicator (RMI)................................16-24 Radio navigation ........................................................16-22 Radius of turn...............................................................5-39 Range performance ......................................................11-9 Pitch .............................................................................5-13 Pitching ........................................................................5-15 Pitot-static flight instruments.........................................8-1 Placards ..........................................................................9-4 Plotter.........................................................................16-12 Positive dynamic stability ............................................5-15 Positive static stability .................................................5-14 Postural considerations ................................................17-8 Powered-lift..................................................................1-15 Powered parachute .......................................................1-15 Powerplant ...............................................3-3, 3-7, 7-1, 9-3 Practical test .................................................................1-22 Precipitation ...............................................................12-17 Precision approach path indicator (PAPI)..................14-16 Pre-landing.................................................................14-34 Pressure ..........................................................................4-3 Pressure altimeter...........................................................8-3 Pressure altitude ................................................... 4-4, 11-3 Pressurized aircraft.......................................................7-34 Preventive maintenance ...............................................9-10 Primary flight controls ...................................................6-2 Primary flight display ..................................................3-12 Primary locations of the FAA Field offices  Flight Standards District Office (FSDO) ...............1-9 Flight Standards Service (AFS) ..............................1-8 Primary radar .............................................................14-24 Procedures, vortex avoidance ....................................14-28 Professional Air Traffic Controllers Organization  (PATCO) strike..............................................................1-6 Prohibited areas............................................................15-3 Propeller.......................................................... 3-7, 7-1, 7-4 Adjustable-pitch propeller..........................................7-6 Fixed-pitch propeller ..................................................7-5 Propeller anti-ice..........................................................7-41 Propeller blade .............................................................5-28 Propeller principles ......................................................5-28 Published VFR routes ..................................................15-6 Pulse oximeters ............................................................7-39