757 Airplane Recovery Document 飞机恢复文件(37)

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B.  The MLW (Maximum Landing Weight) is the maximum weight permitted when you make a landing (by applicable government regulations).
C.  The MZFW (Maximum Zero Fuel Weight) is the maximum weight permitted before you install fuel and other specified agents to operate the airplane. These added weights are controlled by strength limits and airworthiness limits.
D.  The OEW (Operational Empty Weight) is the Manufacturer’s Empty Weight plus standard items and operational items (Standard & Operational Items).
(1)  
These are the first type of items (standard items):

(a)
Fuel that cannot be used

(b)
Engine oil

(c)
Oxygen

(d)
Equipment that is not attached (miscellaneous equipment)

(e)
Galley structure and fixed inserts

 

(2)  
These are the second type of items (operational items):

(a)
Crew and crew baggage

(b)
Removable service equipment for cabin and galley

(c)
Potable water

(d)
Food and beverages

(e)
Waste tank disinfectant

(f)  
Emergency equipment

(g)
Cargo containers

 

E.  
The MEW (Manufacturer’s Empty Weight) is the weight of items that are a necessary part of the configuration of a specified airplane model. It is a basic DRY weight that includes those fluids contained in all closed systems.

F.  
The REW (Recoverable Empty Weight) is the MEW plus the items that are necessary to operate the airplane and are part of it.

G.  
The NRW (Net Recoverable Weight) is the OEW with some adjustments. These adjustments are:

(1)  
Minus the weight of the crew, the crew baggage, food and water

(2)  
The effect of the equipment and airplane components that are not there

(3)  
The effect of fuel or cargo on the airplane

(4)  
The effect of the positions of the landing gear and the flaps

2-30-2

WEIGHT DEFINITIONS
Page 2-25 Jul 01/2005 D623N004
 
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2-30-3 Weight Removal, Increase or Movement to Change the Center of Gravity (CG) Location
1.  
It is very important to decrease the airplane weight to the lowest possible quantity before you start the recovery operation. It will be easier to lift and to tow the airplane. The payload you can remove for a large change in the weight includes the passengers, the cargo and the baggage. The removal of fuel and large airplane components can also decrease a large quantity of the weight.

2.  
You can move or increase the weight on one side of the airplane. This will change the position of the airplane CG. Then you can easily lift the other side of the airplane. For example, if you have a damaged nose gear, you can move weight to the aft end of the airplane. Then you can easily lift the nose of the airplane.
　
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