Pilot’s Operating Handbook
AQUILA AT01-100C
Section 7
AIRCRAFT DESCRIPTION
Document Nr.:
Issue:
Supersedes Issue:
Date:
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FM-AT01-1010-103
A.08
A.06 (01.06.2018)
25.05.2020
7 - 23
7.17 EXTERNAL POWER UNIT (optional)
It is recommended to use an External Power Unit (EPU) for engine start-up at outside
air temperatures below
–10° C. The EPU receptacle is optional and is mounted on the
right fuselage side below the battery. Access is provided by a service door in the lower
cowling.
Electrical power for the engine starter and the electrical buses is provided by a three
poled plug (MIL standard) protected from reverse polarity by a relay circuit. A second
relay disconnects the on-board battery as long as the external power source is
connected to the aircraft. This second relay prevents an uncontrolled charging or
discharging of the battery during the EPU operation.
WARNING
Before starting the engine with external power, make sure that NO persons or objects
are in the vicinity of the propeller disk.
Procedure for starting up the engine with an external power source:
Plug in and switch on the external power
ALT1/BAT
switch ON
Start-up engine
(in accordance with section 4.5.2 “Engine Start-up”)
Disconnect external power source.
7.18 PITOT-STATIC SYSTEM
A pitot-static tube is installed on the lower surface of the left wing which, via two
separate connections, supplies total pressure and static pressure (from 6 vents
distributed on the diameter). Total pressure and static pressure lines travel through the
interior of the wing to the wing root where they are connected to water separators. The
pressure lines have connections installed at the wing root to simplify disassembly of the
wing.
Error in the static system can be neglected for altitude measurement. An airspeed
calibration chart is provided in Section 5 of this manual.
NOTE
When the aircraft is parked the pitot static tube should be covered with the supplied pitot
tube cover to protect it from dirt and other contamination. The cover is attached to a
large “Remove Before Flight” ribbon.
