P2002 Sierra
SECTION B
M A I N T E N A N C E M A N U A L
pag.
B-8
2
st
Edition, April 22
th
, 2008
INSPECTION & SERVICING
7
WEIGHING AND DETERMINATION OF VERTICAL CG
USE
GUIDELINES
AS
FOLLOWS:
a.
Carry out weighing procedure inside hangar
b.
Remove any unnecessary objects inadvertently left on board aircraft
c.
Make sure of the on-board presence of the Flight Manual.
d.
Align nose wheel
e.
Drain fuel
f.
Oil, hydraulic fluids and coolants at operating levels
g.
Move seats to most forward position
h.
Flaps retracted (0°)
i.
Control surfaces in neutral position
j.
Position scales (min. capacity. 200 kg) under each tire
LEVELLING
a.
Level the aircraft (see par.4 “Levelling”)
WEIGHING
a.
Record weights of individual scales
b.
Calculate empty weight
DETERMINATION
OF
CG
a.
Drop a plumb bob tangent to the wing’s leading edge, as indicated into fig-
ure B-5. Trace a reference mark on floor.
b.
Repeat operation on other wing.
c.
Connect the two reference marks with a taut line
d.
Measure distances between reference line and landing gear wheel axles
e.
Recorded data allows determination of C.G. location and aircraft’s moment
(see following table)