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 Associated high stage bleed valve is secured closed,
 A minimum N1 is maintained on associated engine in icing conditions as follows:
70% N1 above 10,000 feet MSL,
60% N1 below 10,000 feet MSL
 Descent, approach and landing are not made in icing conditions within 5,000 feet AGL,
 Remaining (opposite) engine bleed system operates normally, and
 Isolation valve remains closed, except for engine start.
EICAS STATUS MESSAGES
None
PLACARD
Airplane flight log - INTERMEDIATE PRESSURE CHECK VALVE INOP OPEN Pneumatic control panel as appropriate -L(R) ENG HPSOV INOP CLOSED MAINTENANCE (M)
 Notify dispatch. Flight operations may be affected.
 Lock applicable high stage bleed valve (high pressure shutoff valve) in the closed position per MEL Item 36-11-2 procedure.
 Press ISOLATION switchlight to closed position. Verify that bar light is off and VALVE light comes on and then goes off.
OPERATIONS (O)
1. Maintain a minimum of 70% N1 above 10,000 feet MSL or 60% N1 below 10,000 feet MSL on the affected engine in icing conditions.
 

NUMBER INSTALLED
1 NUMBER REQUIRED FOR DISPATCH
REMARKS OR EXCEPTIONS
0 (M) May be inoperative provided:
 Valve is closed, and
 Bleed switch remains OFF.
NOTE: APU may be used for electrical power.

 
EICAS STATUS MESSAGES
None
PLACARD
Pneumatic control panel - APU BLEED VALVE INOP CLOSED MAINTENANCE (M)
1. Press APU VALVE switchlight on P5 panel to OFF position. Verify the green bar light on the switchlight is not illuminated.
A. If VALVE Light is illuminated, manually close APU valve as follows:
 Open and collar APU BLEED PWR circuit breaker on P11 overhead circuit breaker panel.
 Open controls access door (313BL).
 Manually position the position indicator on APU valve to CLOSE.
 Close controls access door (313BL).
 

 
.
 
APU SHUTOFF VALVE
 
NUMBER INSTALLED

 NUMBER REQUIRED FOR DISPATCH
REMARKS OR EXCEPTIONS
1 0 May be inoperative provided APU bleed valve
remains closed, except for engine start.
 
EICAS STATUS MESSAGES
None
PLACARD
As appropriate
 
REPAIR INTERVAL C 1 NUMBER INSTALLED
ITEM   0 NUMBER REQUIRED FOR DISPATCH
    REMARKS OR EXCEPTIONS
(M) Except for ETOPS operations beyond 120 minutes, may be inoperative provided:
 Valve is closed except for engine start,
 Airplane is not operated in known or forecast icing conditions, and
36-11-6 Bleed Air ISLN Valve    
 Both engine bleed valves operate normally.
EICAS STATUS MESSAGES
None
PLACARD
　
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本文鏈接地址：757 最低設(shè)備清單 Minimum Equipment List (MEL) 2(64)