2
st
Edition, April 22
th
, 2008
P2002 Sierra
MAINTEN ANC E MAN UAL
SECTION E
SYSTEMS
pag
.
E-7
3 - PITOT AND STATIC SYSTEM
Referring to figure E-6, system consists of an airspeed sensor assembly (1)
mounted below the left wing. The airspeed sensor assembly is made of a Pitot
tube (3) and four static ports (6) drilled on a tube (2) parallel to the Pitot. Flexi-
ble plumbing connects pitot and static ports to pressure instruments. The air-
speed system drainage could be carried out by disconnecting the fittings (5) be-
tween the wing and fuselage part of the system.
Servicing the system is easy and is carried out in accordance with schedule listed
in the Periodic Inspection Table found in Section B; simply remove tubes from
instruments and blow air in tube in port direction and never vice versa, clearing
possible obstructions and checking line condition.
Check visually and more frequently Pitot tube (3) and static ports (6) clearing
possible obstructions.
F
IGURE
E-6
PITOT
AND
STATIC
SYSTEM
For safety reasons and to ensure correct airspeed readings, it is important to
check the airspeed system for leaks adopting the following procedure:
Fasten a piece of rubber hose approximately 30 centimetres long to the Pitot
tube, close off the opposite end of the hose and slowly roll it up until the air-
speed indicator shows cruise speed. Constant reading is an indication of no leak
in system.
Avoid blowing air through Pitot or static ports, as this causes immediate
damage to the airspeed indicator
WARNING
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