AMD 601XL / 601XLI / 650LS / 650LSi SLSA MAINTENANCE MANUAL
_______________________________________________________________________
SECTION IX
INSTRUMENTS
GENERAL
The instrumentation in the ZODIACSLSA is designed to give a quick and actual
indication of the attitude, performance and condition of the airplane. The instrument panel
has been arranged to accommodate all the advanced flight instruments in front of the pilot.
The two types of instruments installed in the ZODIACSLSA have been classified in this
section as standard and optional. The first part of this section will pertain to maintenance
and troubleshooting of all the standard instruments and their systems. The remaining
portion of this section is directed to maintenance and troubleshooting of optional
instruments.
AIRSPEED INDICATOR
GENERAL
The airspeed indicator provides a means of indicating the speed of the airplane passing
through the air. The airspeed indication is the differential pressure reading between
dynamic air pressure and static air pressure. This instrument has the diaphragm vented to
the dynamic air source and the case is vented to the static air system. As the airplane
increases speed, the dynamic air pressure increases, causing the diaphragm to expand. A
mechanical linkage picks up this motion and moves the instrument pointer to the indicated
speed. The instrument dial is calibrated in MPH, and also has the necessary operating
range markings for safe operation of the airplane.
TROUBLESHOOTING See following table:
AIRSPEED TUBES AND INDICATOR
Trouble
Cause
Remedy
Pointers of static instruments do
not indicate properly.
Leak in instrument case or in
lines.
Check for leak and seal.
Pointer of instrument oscillates.
Leak in instrument case.
Check for leak and seal.
July 09
9.1