TM 1-1520-238-23
Change 9
G-18.1
G.1A.
HELICOPTER WEIGHING (AIRCRAFT ON PLATFORM SCALES)
G.1A.1. Description
This task covers:
Preparation. Weighing. Calculations.
G.1A.2.. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Aircraft maintenance kit (item 207, App H) (p/o item 25
and 194, App H) (plumb bob leveling kit)
Aircraft towbar (item 395, App H)
100-foot measuring tape (item 348, App H)
Tire inflator assembly (item 364, App H)
Weighing kit (item 196, App H)
Axle Extension (item 485, App D)
Materials/Parts:
Personnel Required:
67R3F
Attack Helicopter Repairer/Technical
Inspector
Three persons to assist
One Tow Tug Operator
Equipment Conditions:
Ref
Condition
Helicopter cleaned inside/outside and dry
1.57
Helicopter safed
1.19
Helicopter defueled, SPA method
1.24
Engine oil system serviced
1.26
APU oil system serviced
1.28
Engine nose gearboxes serviced
1.30
Intermediate gearbox serviced
1.31
Tail rotor gearbox serviced
1.32
Main transmission serviced
1.34
Hydraulic system serviced
1.43
Tires serviced
1.40
MLG struts serviced
WARNING
When weighing helicopter, ensure that area is roped off and that multiple warning signs that
read “HELICOPTER ON SCALES” are prominently displayed. Do not allow unauthorized per-
sons in or around helicopter while it is on scales.
The helicopter must be defueled before weighing. Helicopter Center of Gravity (CG) cannot
be accurately determined when weighed with fuel on board using this non-level weighing
procedure.
CAUTION
Weighing should be done inside a hangar with all doors closed. Weighing the helicopter outdoors is
not recommended as wind velocities will affect the accuracy of scale readings.
Wing Stores are not part of the aircraft BASIC WEIGHT and shall be removed before weighing.
Weighing with wing stores installed will cause an incorrect center of gravity calculation when
converting from “as weighed” condition to “corrected to level attitude”.
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