Figure 3-20.—Wire rope slings.
NAVAIR 01-1B-50 for aircraft where this procedure is
not required or desired.
Tow the aircraft onto the scales. Do not apply the
aircraft’s brakes, because they may bind the scales; this
would require rezeroing of the scales. Recheck the
aircraft level. Read the scales and make dimensional
measurements per Chart E instructions and NAVAIR
01-1B-50.
Make the applicable DD Form 365-2 entries and
verify the weighing results. If a large discrepancy is
noted, check to see where the error could have occurred.
If the source of the error is not found, reweigh aircraft
by removing and replacing the aircraft on the scales.
Remove the aircraft from the scales. If the scale does
not return to zero after 10 minutes, reweigh the aircraft.
Be sure that the brakes are not used or applied.
Determine the tare per the appropriate scale instructions.
Tare is the weight of equipment necessary for weighing
the aircraft. Tare includes items such as shocks, blocks,
slings, and jacks. These items are included in the scale
reading, but are not part of the aircraft weight. Tare may
also include a scale correction factor. A scale correction
factor is used to modify scale readings because of
inherent inaccuracies of the scale. If the scale correction
factor is larger than the scale calibrated accuracy, the
scale should be repaired. Enter the tare on the Aircraft
Weighing Record, DD Form 365-2. Stow the
equipment.
All aircraft must be weighed and balanced upon
completion of standard depot-level maintenance
(SDLM). Aircraft should also be weighed and balanced
under the following conditions:
1. When service changes, modifications, or repairs
are accomplished and calculated, or actual weight and
moment data for these changes are not available
2. When recorded weight and balance data is
suspected of being in error
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