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Aircraft Technical Manual
Jabiru Aircraft
Pty Ltd
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
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ISSUE
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Dated: 29th October 2014
Issued By: AS
Page: 247 of 298
11.4 Instruments (all J-Series)
11.4.1 Description
Jabiru Aircraft are equipped with a wide range of instruments depending on specification. Generally,
all instruments are secured to the panel fascia with screws inserted through the panel face.
In some cases rack mounts are used where the instrument is held in a rack which, in turn, is secured
to the fascia or to the fibreglass panel mount.
11.4.2 Instrument Removal & Installation
Required Tools:
Screwdrivers
Parts and Material:
Caps
Insulating tape
Type of Maintenance:
Line Maintenance
Level of Certification:
L2 or LAME (A&P or LSA Repairman / Maintenance)
Return to Service:
L2 or LAME (A&P or LSA Repairman / Maintenance)
To remove an instrument, disconnect wiring or pluming to the instrument, remove instrument
mounting screws and take instrument out from behind, or in some cases, from the front of the panel.
In some cases, due to access, it may be easier to partially remove the panel fascia as noted above
before attempting to remove instruments.
For instruments mounted in a rack refer to the instrument manufacturer’s instructions for removal and
installation procedures.
In all cases when an instrument is removed, disconnected lines or wires should be protected. Cap
open lines and cover pressure connections on instrument to prevent thread damage and entrance of
foreign matter. Wire terminals should be insulated or tied up so that accidental ground or short-
circuiting will not occur.
Generally, the installation procedure is the reverse of the removal procedure. Ensure mounting
screws and nuts are tightened firmly, but do not over-tighten, particularly on instruments having
plastic cases. The same rule applies to connecting plumbing and wiring.
11.5 Pitot & Static Systems (all J-Series)
11.5.1 Description
The pitot system conveys ram air pressure to the airspeed indicator.
The static system vents the vertical speed indicator (if fitted), altimeter and airspeed indicator to
atmospheric pressure through plastic tubing connected to a static port.
In Jabiru Aircraft the pitot and static systems each have a water trap
(or “low point”) fitted which must
be checked during scheduled maintenance or after flying through rain.
CAUTION
Proper maintenance of pitot and static system is essential for proper operation of the altimeter,
airspeed indicator and vertical speed indicator (if fitted). Leaks, moisture and obstructions in the
pitot system will result in false airspeed indications, while static system malfunctions will affect
readings of all three instruments. Cleanliness and security are the principal rules for system
maintenance. The pitot tube and static ports MUST be kept clean and unobstructed.