Aircraft Systems • 3
Flaps
The Archer is equipped with a manual ap system. The aps are extended with
a lever located between the two pilot seats. Flap settings are 0°, 10°, 25°, and 40°,
and are spring-loaded to return to the 0 ° position.
ATP operations require aps 25° for all landings except:
• Short and soft eld, aps 40°
• Precision approach, aps 10°
Pitot Static
Pitot and static pressure are both received from a pitot head installed on the
bottom of the left wing. An alternate static source is located inside the cabin
under the left side of the instrument panel, for use in the event of static port
blockage. When using the alternate static source, the storm window and cabin
vents must be closed and the cabin heater and defroster must be on. This will
reduce the pressure dierential between the cockpit and the atmosphere,
reducing pitot-static error. The pitot-static instruments are the airspeed
indicator, altimeter, and vertical speed indicator.
Both the pitot and static lines can be drained through separate drain valves
located on the left lower side of the fuselage interior.
Fuel System
The Archer, which uses 100 low lead avgas (blue), is equipped with two 25
gallon fuel tanks. One gallon is unusable in each tank. There is one engine-
driven and one electrically-driven fuel pump. The electric fuel pump is used for
all takeos and landings, and when switching tanks.
ATP uses the electric fuel pump for in-ight maneuvers, except
for steep turns.
The aircraft is equipped with a three-position fuel selector control. The positions
are “L”, “R”, and “OFF”.
The correct procedure for switching tanks in cruise ight is:
1. Electric fuel pump on
2. Fuel selector from “L” to “R” or from “R” to “L”
3. Check fuel pressure
4. Electric fuel pump o
5. Check fuel pressure
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