GENERAL.
The instrument air system consists of pitot air and static air sources. The system supplies both pitot and static
air pressure for the airspeed indicator, altimeter and vertical speed indicator. These instruments are face mounted.
DESCRIPTION AND OPERATION.
The pitot air system consists of a pitot mast located on the underside of the left wing, with its related
plumbing. Impact air pressure entering the pitot is transmitted from the pitot inlet through hose and tubing routed
through the wing to the airspeed indicator on the instrument panel. A partially or completely blocked pitot head
will give erratic or zero reading on the instruments.
Static air system consists of a static port located on the bottom of the pitot mast. The static port is directly
connected to the airspeed indicator, altimeter and rate of climb indicator on the instrument panel by means of
hose and tubing routed through the wing along with the pitot line. An alternate static air source is located below
the instrument panel in front of the pilot. The alternate static source is part of the standard system and has a
shutoff valve which closes the port when it is not needed. A placard giving instructions for use is located on the
instrument panel. Pitot and static lines can be drained through separate drain valves located on the left lower side
of the fuselage interior.
FLIGHT.
RATE OF CLIMB INDICATOR.
The rate of climb indicator measures the rate of change in static pressure when the airplane is climbing or
descending. By means of a pointer and dial, this instrument will indicate the rate of ascent or descent of the
airplane in feet per minute. Due to the lag of the instrument, the aircraft will be climbing or descending before the
instrument gives the correct rate. The instrument will continue to read after the aircraft has assumed level flight.
In rough air this should not be considered a malfunction.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3 4 - 11 - 0 0
Page 34-01
Revised: May 15, 1989
2I19
PIPER AIRCRAFT
Summary of Contents for SEMINOLE PA-44-180
Page 38: ...CHAPTER DIMENSIONS AND AREAS 1B14...
Page 49: ...CHAPTER LIFTING AND SHORING 1C1...
Page 53: ...CHAPTER LEVELING AND WEIGHING 1C5...
Page 58: ...CHAPTER TOWING AND TAXIING 1C10...
Page 62: ...CHAPTER PARKING AND MOORING 1C14...
Page 65: ...CHAPTER REQUIRED PLACARDS 1C17...
Page 70: ...CHAPTER SERVICING 1C22...
Page 98: ...CHAPTER STANDARD PRACTICES AIRFRAME 1E2...
Page 108: ...CHAPTER ENVIRONMENTAL SYSTEM 1E12...
Page 189: ...CHAPTER AUTOFLIGHT 1H21...
Page 192: ...CHAPTER COMMUNICATIONS 1H24...
Page 202: ...CHAPTER ELECTRICAL POWER 1I10...
Page 228: ...CHAPTER EQUIPMENT FURNISHINGS 1J12...
Page 233: ...CHAPTER FIRE PROTECTION 1J17...
Page 238: ...CHAPTER FLIGHT CONTROLS 1J24...
Page 304: ...2A18 CHAPTER FUEL...
Page 325: ...2B17 CHAPTER HYDRAULIC POWER...
Page 357: ...2D1 CHAPTER ICE AND RAIN PROTECTION...
Page 414: ...CHAPTER LANDING GEAR 2F13...
Page 479: ...2I6 CHAPTER LIGHTS...
Page 488: ...2I16 CHAPTER NAVIGATION AND PITOT STATIC...
Page 503: ...2J7 CHAPTER OXYGEN...
Page 524: ...2K6 CHAPTER VACUUM...
Page 535: ...2K19 CHAPTER ELECTRICAL ELECTRONIC PANELS AND MULTIPURPOSE PARTS...
Page 546: ...INTENTIONALLY LEFT BLANK PA 44 180 180T AIRPLANE MAINTENANCE MANUAL 2L6 PIPER AIRCRAFT...
Page 547: ...2L7 CHAPTER STRUCTURES...
Page 582: ...CHAPTER DOORS 3A18...
Page 593: ...CHAPTER STABILIZERS 3B8...
Page 604: ...CHAPTER WINDOWS 3B22...
Page 611: ...CHAPTER WINGS 3C10...
Page 624: ...CHAPTER PROPELLER 3D1...
Page 643: ...CHAPTER POWER PLANT 3D21...
Page 667: ...CHAPTER ENGINE FUEL SYSTEM 3F1...
Page 681: ...CHAPTER IGNITION 3F16...
Page 712: ...CHAPTER ENGINE INDICATING 3H1...
Page 730: ...CHAPTER EXHAUST 3H19...
Page 734: ...CHAPTER OIL 3I1...
Page 743: ...CHAPTER STARTING 3I11...
Page 755: ...CHAPTER TURBINES 3J1...