previous (adj)  BEFORE (con)   REMOVE THE PLATE BEFORE YOU ADJUST THE CABLE.  Adjustment of the cable requires previous removal of the plate.
 previously (adv)  BEFORE (con)   IF THE CONTROL WAS ADJUSTED BEFORE YOU DO THIS PROCEDURE, DO NOT DO THE VALVE TEST.  If the control was adjusted previously, omit the valve test.
 primarily (adv)  PRIMARY (adj)  THE PRIMARY FUNCTION OF THE HYDRAULIC PRESSURE SYSTEM IS TO SUPPLY PRESSURE FOR THE OPERATION OF THE FLIGHT CONTROLS.  The hydraulic pressure system functions primarily to provide pressure for operating the flight controls.
 PRIMARY (adj)  First (TN) in "importance"  THE PRIMARY FUNCTION OF THE POWER UNIT IS TO SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.  
 prime (v)  FILL, PUT  FILL THE FILLER HOSE.  Prime the filler hose.
       PUT XXXX IN THE GEARBOX.  Prime gearbox.
principal (adj)  PRIMARY  THIS IS THE PRIMARY FUNCTION OF THE SYSTEM.  This is the principal function of the system.
 prior to (pre)  BEFORE (con)   DRAIN THE SYSTEM BEFORE YOU DISCONNECT THE COMPONENTS.  Drain the system prior to disconnecting the components.
 priority (n)  IMPORTANT (adj), BEFORE (pre)  THIS PROCEDURE IS VERY IMPORTANT.  This procedure has high priority.
       DURING THE PROCEDURE THAT FOLLOWS, REPAIR THE UPPER FLANGE BEFORE THE OTHERS.  During the following repair procedure, the upper flange gets priority.
 probe (v)  USE A XXXX  USE A XXXX TO FIND THE BLOCKAGE.  Probe the tube with a XXXX to find the blockage.

 
 
 PROBLEM (n)  Something that is difficult and for which you must find the correct "answer"  IF YOU FIND A PROBLEM, REFER TO THE TROUBLESHOOTING MANUAL.  
 PROCEDURE (n)  Steps that are in a sequence  THESE MAINTENANCE PROCEDURES ARE APPLICABLE TO THE MAIN LANDING GEAR ONLY.  
 proceed (v)  CONTINUE  CONTINUE WITH THE ELECTRICAL TEST.  Proceed with the electrical test.