Aspen Avionics Evolution EFD1000 VFR PFD - Page 177

EFD1000 VFR PFD Pilot’s Guide
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091-00028-001 ( ) EFD1000 VFR PFD Pilot’s Guide
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091-00028-001 ( )
CHAPTER 6 EXPANDED EMERGENCY AND ABNORMAL PROCEDURES
Blocked Pitot or Static Line Suspected
1. Turn Pitot heat ON
2. Open the Alternate Static Source
3. Refer to alternate attitude, airspeed, altitude, and heading sources for primary
ight information
4. Consider exiting IMC
5. Land as soon as practicable
CAUTION
Most light aircraft have only a single pitot and static port available for ight instrument
use. As such, the pitot and static lines used by the PFD are shared with those lines used by
the standby airspeed indicator and altimeter. Should these lines become blocked, such
as might occur due to an inadvertent icing encounter, the PFD, the standby airspeed
indicators and the altimeters will display erroneous information.
Because the PFD uses pitot and static pressures as part of the ADAHRS solution, loss or
corruption of this data, such as from a line blockage, will aect the attitude and heading
information.
Whenever an erroneous pitot input is detected by the PFD inight, it will replace
the aected instruments with red Function Fail Xs and display a CHECK PITOT HEAT
annunciation. In this case, the pilot should check pitot heat, select the aircraft’s
alternate static source and refer to secondary sources of attitude, airspeed, and heading
information.