Technical data

13773-001
28-40
Page 1
INDICATING
1. DESCRIPTION
Fuel flow is monitored with a turbine flow transducer located between the throttle body and injection mani-
fold. A fuel flow gage is installed in the instrument panel adjacent to the other engine instruments.
The fuel quantity in each integral fuel tank and each integral collector tank is displayed by a single fuel
quantity indicator (fuel gage). One float type fuel quantity sensor is installed in each integral fuel tank and
each integral collector tank. The fuel level senders are not adjustable. To adjust the fuel quantity indicator
reading, the fuel gage itself must be adjusted.
A fuel level gage is installed in the center console directly forward of the fuel selector valve. The fuel gage
indicates the amount of usable fuel remaining in each fuel tank. The fuel quantity indicator is a 2¼” dual
indicator, with separate needles and markings for the left and right fuel tanks, and a range of 0 gallons to
full (F). The indicator has a yellow arc from 0 to 14 gallons, a red line at 0 gallons, and a red arc from 0 gal-
lons down to the minimum meter movement. The indicator has 4 separate needle adjustment screws for
full and empty indications on the left and right tanks. The annunciator indicates low fuel when both tanks
are below approximately14 gallons. These outputs are monitored by the caution/warning annunciator
panel to indicate a low fuel condition. The indicator is internally lighted with externally replaceable lamps,
and has non-reflective glass.
Note: When servicing fuel system pipe thread fittings, apply a small amount of grease (MIL-G-
60320 Type 1) to the external threads.
2. MAINTENANCE PRACTICES
A. Fuel Quantity Indicator (See Figure 28-401)
(1) Removal - Fuel Quantity Indicator
(a) Ensure BAT 1, BAT 2, and AVIONICS master switches are in off position.
(b) Pull ENGINE INSTRUMENTS circuit breaker.
(c) Remove right mid-console trim panel. (Refer to 25-10)
(d) Locate and unplug wire harness from the fuel level indicator.
(e) Remove the four screws and washers from the upper side of fuel level indicator and
remove indicator.
(2) Installation - Fuel Quantity Indicator
(a) Install indicator into position and secure with screws and washers.
(b) Connect fuel indicator wire harness.
(c) Adjust the fuel indicator. (Refer to 28-40)
(d) Install right mid-console trim panel. (Refer to 25-10)
(e) Reset ENGINE INSTRUMENTS circuit breaker.
(3) Adjustment - Fuel Quantity Indicator
(a) Remove right mid-console trim and locate fuel quantity indicator. (Refer to 25-10)
(b) Drain both integral fuel tanks and both integral collector tanks. (Refer to 12-10)
(c) Add 1-1/2 gallons of fuel to each tank and allow fuel to settle.
(d) Turn BAT switch to the ON position.
(e) Remove fuel indicator adjustment screw covers.
(f) Adjust both the left and right empty adjustment screws until the needles indicate zero gal-
lons.
(g) Turn BAT switch to the OFF position.
(h) Fill both fuel tanks to within one inch of the filler cap.
30 Nov 2000