MD Helicopters MD Explorer - Functional Test of the Fuel Quantity Indication System; Functional Tests for the Fuel Quantity Indication System

CSP−900RMM−2 MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 626
Revision 34
28-00-00
8. Functional Tests for the Fuel Quantity
Indication System
A. Functional Test of the Fuel Quantity
Indication System
NOTE: This procedure calibrates the fuel quan
tity system when the fuel cell or fuel probes
have been replaced.
(Ref. Figure 605, Figure 606, and Figure 607)
Aviation Turbine Fuel
Special Tools
(Ref. CSP−SPM)
Item Nomenclature
T201 Jack Pad Kit
T202 Helicopter Jack
T203 Inclinometer
T807 Thermometer
T808 Scale
Make sure the rotorcraft is on
on stable and level ground be
fore you do the fuel quantity test.
(1). Attach the rotorcraft to an approved
electrical ground (ref. Section
10-10-00).
(2). Remove the filler cap and secure the
lanyard in the slot provided in the filler
cap adapter.
(3). Defuel and drain fuel cell sump of all
fuel with aircraft at a normal ground
attitude (ref. Section 12-00-00).
(4). Install jack pad kit (T201) on aft
landing gear crosstube saddle assem
blies (ref. Section 07-10-00).
(5). Locate inclinometer (T203) on cabin
floor longitudinal axis between stations
155.00 and 213.00.
(6). Use helicopter jack (T202) to jack
rotorcraft evenly to get a 5° nose down
simulated flight attitude on the
inclinometer scale placed longitudinally
on the cabin floor, and level laterally
across the cabin floor.
(7). Stabilize the rotorcraft with wooden
blocks under landing gear skid tubes as
required.
(8). For rotorcraft that are defueled, add to
the fuel cell 2.60 US gal (9.84 L) as
measured from a calibrated fuel truck
metering system.
NOTE: The difference between a completely
dry fuel cell and a defueled fuel cell is 0.23
US gal (0.87 L) of trapped fuel in the cell
which cannot be recovered.
(9). For rotorcraft which are completely dry
of fuel, including the sump area, add to
the fuel cell 2.83 US gal (10.71 L) as
measured from a calibrated fuel truck
metering system.
(10). Alternate Method:
(a). Record empty weight of a suitable
container.
(b). Calculate the approximate weight of
fuel:
1). Find the fuel density for one gallon
based on type of fuel and the
temperature of the fuel measured
with a thermometer (T807) (ref.
Figure 608).
2). Multiply the required gallons of
fuel by the fuel density to get
required weight of fuel in pounds.
3). Weigh out this much fuel with
scale (T808).
4). Add weighed fuel to fuel cell.
CAUTION