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For unpressurized flight, see Item 21-31-1 Auto Cabin Pressure Control Systems, OPERATIONS (O) - Unpressurized Flight procedure.
When dispatching with empty Cargo Compartment the associated Compartment must remain empty or contain only ballast, empty cargo handling equipment (ballast may be loaded in ULDs(Unit Load Device)),
or Flight Kits. The content of a Flight Kit is defined in B757 Technical File. Materials to be used as ballast shall be non-combustible (see MEL Preamble).
 
 
B757 - 200 MINIMUM EQUIPMENT LIST
 

 
EICAS STATUS MESSAGES
None
PLACARD
Cabin differential pressure indicator (P5 panel) - CABIN DIFF INOP
MAINTENANCE (M)
For unpressurized flight, use Item 21-31-1 Maintenance (M) procedure
OPERATIONS (O)
1. For unpressurized flight, use Item 21-31-1 Operations (O) procedure.
2. For pressurized flight, use following chart to convert cabin altitude to cabin differential pressure.
 
  B757 - 200 MINIMUM EQUIPMENT LIST

CABIN ALTITUDE 1000 FT
When dispatching with empty Cargo Compartment the associated Compartment must remain empty
or contain only ballast, empty cargo handling equipment (ballast may be loaded in ULDs(Unit Load Device)), or Flight Kits. The content of a Flight Kit is defined in B757 Technical File. Materials to be used as ballast shall be non-combustible (see MEL Preamble).
 
REPAIR INTERVAL
ITEM
21-33-3 CABIN ALT Indicator C
C
 

 
EICAS STATUS MESSAGES
None
PLACARD
Cabin altitude indicator (P5 panel) - CABIN ALT INOP
MAINTENANCE (M)
For unpressurized flight, use Item 21-31-1 MAINTENANCE (M) procedure,
OPERATIONS (O)
1. For pressurized flight, use chart provided in OPERATIONS (O) procedure MEL Item 21-33-2.
2. For unpressurized flight, use Item 21-31-1 OPERATIONS (O) procedure.
3. When dispatching with empty cargo compartments, operators must establish and use procedures to verify the associated compartment remains empty or contains only ballast, empty cargo handling equipment (ballast may be loaded in ULDs), or fly away kits. The operator's MEL must define which items are approved for inclusion in the fly away kits and which materials can be used as ballast.
 
NUMBER INSTALLED

  NUMBER REQUIRED FOR DISPATCH
1 0 REMARKS OR EXCEPTIONS

 
EICAS STATUS MESSAGES
None
PLACARD
Cabin Outflow Valve Position Indicator (P5 Panel) -VALVE POS IND INOP
 
REPAIR INTERVAL C 1 NUMBER INSTALLED
ITEM   0 NUMBER REQUIRED FOR DISPATCH
    REMARKS OR EXCEPTIONS
(O) May be inoperative provided:
a) Both automatic pressure control systems operate normally, and
b) CABIN ALT or CABIN RATE of climb indicator operates normally.
　
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本文鏈接地址：757 最低設(shè)備清單 Minimum Equipment List (MEL) 1(41)