Cessna SkyHawk SP 172S NAV III 2005 Pilot Operating Handbook page 186

SECTION 6 CESSNA
WEIGHT AND BALANCE/EQUIPMENT LIST MODEL 172S NAV III
AIRPLANE WEIGHING PROCEDURES
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I
I
I
2. Level:
a. Place scales under each wheel (minimum scale
capacity, 1000 pounds).
b. Deflate the nose tire and/or lower or raise the nose strut
to properly center the bubble in the level (refer to Figure
6-1).
3. Weigh:
a. Weigh airplane in a closed hangar to avoid errors
1
caused by air currents.
b. With the airplane level and brakes released, record the
weight shown on each scale. Deduct the tare, if any,
from each reading.
4. Measure:
a. Obtain measurement A by measuring horizontally (along
the airplane centerline) from a line stretched between
the main wheel centers to a plumb bob dropped from the
firewall.
b. Obtain measurement B by measuring horizontally and
parallel to the airplane centerline, from center of nose
wheel axle, left side, to a plumb bob dropped from the
line between the main wheel centers. Repeat on right
side and average the measurements.
5. Using weights from step 3 and measurements from step 4,
the Basic Empty Weight and C.G. can be determined by
completing Figure 6-1.
6. Changes to the Airplane Weight and Balance due to
alteration or repair must be documented in a permanent
record within the POH similar to that shown in Figure 6-2.
7. A new Basic Empty Weight and CG Arm based on actual
airplane weight (as weighed) is required after a major repair
or alteration. It is recommended that the airplane be ')
weighed to verify Basic Empty Weight and CG Arm at
intervals not to exceed
5
years.
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16-4
U.S.
172SPHAUS-01