Pitot-Static Instruments Flashcards
What are the 3 Pitot-Static Instruments?
Airspeed Indicator
Vertical Speed Indicator
Altimeter
If the Pitot Tube is blocked which instrument malfunction?
Airspeed Indicator
The Pitot Tube is connected to which instrument?
Airspeed Indicator only
The Static port is connected to what instruments?
Airspeed Indicator
Vertical Speed Indicator
Altimeter
If the Static port is blocked which instruments fail? and what will instruments indicate?
The Altimeter will freeze at the altitude at which to blockage occurred.
The Vertical Speed Indicator will indicate level flight.
If the Pitot Tube is blocked but not the drain hole, what happens?
The Airspeed Indicator will indicate zero
If the pitot tube and drain hole is blocked, what happens?
The Airspeed Indicator will act as an altimeter It will read higher as the aircraft climbs and lower as the aircraft descends. It reads lower than actual speed in level flight.
How often is the pitot/static system checked?
Must be checked within the proceeding 24 calendar months.
A record must be kept in the aircraft logbook.
What corrective action is needed if the pitot tube freezes? IF the Static port freezes?
For pitot tube - Turn pitot heat ON.
For static system - Use alternate air if available or break the face of a static instrument (either the VSI or A/S indicator)
What indications should you expect while using alternate air?
In many unpressurized aircraft equipment with a pitot-static tube, an alternate source of static pressure is provided for emergency use.
If the alternate source is vented inside the airplane, where static pressure is usually lower than outside, section of the alternate static source may result in the following instrument indications:
Altimeter - reads higher than normal Airspeed Indicator - indicated airspeed reads greater than normal.
Vertical Speed Indicator - momentarily shows a climb
