RESERVOIR (DOORS 1,2, AND 4) ASEE EMERGENCY POWER  RESERVOIR 
PRESSURE GAGE TEMPERATURE CHART PRESSURES) (SEE THE PRESSURE-FOR SATISFACTORY 
(EXAMPLE) ENTRY DOOR  ASEE FWD EMERGENCY POWER RESERVOIR (DOORS 3 AND 5)

A
3500
RESERVOIR PRESSURE (PSI)

RESERVOIR SERVICING PRESSURE, UPPER LIMIT 
3000 
2500  SATISFACTORY PRESSURE RANGE 
2000 

-10 0 20 40 60 80 100 120 140 RESERVOIR TEMPERATURE (`F) RESERVOIR PRESSURE - TEMPERATURE CHART Emergency Power Reservoir Inspection Figure 601
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A 747-400 MAINTENANCE MANUAL
 (1)  S 416-002For the overhead reservoir installation, open the ceiling access panel, above and forward of the door.
 (2)  S 216-004For the floor level reservoir installation, look through the view port in the dado panel, forward of the door.
 (3)  S 216-003Read the pressure from the pressure gage on the reservoir.
 NOTE:____ Make sure you know the temperature of the reservoir when you read the pressure.
 (4)  S 226-004Compare the value from the pressure gage with the pressure-temperature chart (Fig. 601). (a) The reservoir is satisfactory if the pressure in the reservoir is in the sufficient pressure range on the pressure-temperature chart.

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A
747-400 MAINTENANCE MANUAL
 MAIN ENTRY DOOR EMERGENCY POWER SYSTEM TRIGGER - REPAIRS
________________________________________________________
 1.  General_______
 A.  This procedure contains a task which repairs the trigger on the emergency power system on the main entry door.
 TASK 52-11-08-308-001
 2.  Repair Trigger______________
 A.  Parts
 (1)
MS20426B - Rivet, Solid Aluminum Alloy (100-degree countersink)

 B.  
References

 (1)
AMM 52-11-08/401, Main Entry Door Emergency Power System Trigger

 (2)
IPC 52-11-08

 C.  
Access

 (1)  
Location Zone 211 Passenger Cabin, Nose to First Door, LH 212 Passenger Cabin, Nose to First Door, RH 231 Passenger Cabin, First to Second Door, LH 232 Passenger Cabin, First to Second Door, RH 241 Passenger Cabin, Second to Third Door, LH 242 Passenger Cabin, Second to Third Door, RH 251 Passenger Cabin, Third to Fourth Door, LH 252 Passenger Cabin, Third to Fourth Door, RH 271 Passenger Cabin, Sta 2040 to Sta 2360, LH 272 Passenger Cabin, Sta 2040 to Sta 2360, RH

 (2)  
Access Panel
 831L Door - No. 1 Main Entry, LH
 841R Door - No. 1 Main Entry, RH
 832L Door - No. 2 Main Entry, LH
 842R Door - No. 2 Main Entry, RH
 833L Door - No. 3 Main Entry, LH
 843R Door - No. 3 Main Entry, RH
 834L Door - No. 4 Main Entry, LH
 844R Door - No. 4 Main Entry, RH
 835L Door - No. 5 Main Entry, LH
 845R Door - No. 5 Main Entry, RH

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A
747-400 MAINTENANCE MANUAL
 D. Procedure
 S 028-002
 (1)  
Remove the trigger (AMM 52-11-08/401).

 S 328-003

 (2)  
Repair the trigger.

 (a)  
Lightly make the countersink on the the two sides of the hole in the trigger shaft 100 degrees.

 (b)  
Install the rivet into the countersunk hole and cut it to the shaft contour.

 S 428-004
 (3)  Install the trigger (AMM 52-11-08/401).
　
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