WEIGHT AND BALANCE
145 140 135 LB
AIRPLANE
OPERATIONS
MANUAL
1-06-30
Page
12
Code
02
REVISION 31
OEW/OEI DETERMINATION
The OEW (Operational Empty Weight) is the BEW plus the weight of
the operational items (crew, catering, lavatory fluid, etc.). The OEI
(Operational Empty Index) is the index for the OEW.
In order to determine the OEW and OEI, it is necessary to add to the
BEW all the weight and moment variations referent to the operational
items. The BEW is obtained from the airplane weighting record.
Example: Computation of OEW/OEI for the EMB-145.
For a BEW equal 26572 lb and BEW moment equal 16546149.55 lb.in:
Item Weight
(lb)
Arm
(in)
Moment
(lb.in)
BEW 26572 - 16546149.55
Lavatory fluid
44
15.43
813.38
810.24
35788.72
12502.00
Pilot & Co-Pilot 380 142.91 54305.80
Flight attendant (fwd) 170 188.97 32124.90
CREWMEMBER ROLLER
BAG
30 196.85 5905.50
PILOT FLIGHT BAG 20 155.51 3110.20
FLIGHT ATTENDANT KIT 10 196.85 1968.50
OEW (not including
catering)
27241.43 - 16691855.17
Airplane arm = 612.7427241.43716691855.1 = inches
()
49IU13
17400
590612.7427241.43
IndexAirplane =+
−×
=
(not including catering)
NOTE: - Catering weight was not considered above because its
weight is not constant. In our example we are considering
catering as a separate item (see Index Influences).
- Unusable fuel, hydraulic fluid, engine and APU oil are
considered included in the BEW.
- The values above are an example. Use the airplane actual
BEW for determining the OEW.
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