(2)
Put the elevator hydraulic systems A and B back to the condition before the pressure removal.
(3)
Pressurize the elevator hydraulic systems A and B.
(4)
Put the elevator hydraulic systems A and B back to the condition before the pressurization.
(5)
A null procedure of the mach trim actuator.
(6)
A visual inspection of the Elevator Control Pushrod.
(7)
A visual inspection of the Elevator Feel and Centering Unit.
B.
The electrical pump 1 pressurizes the hydraulic system B and the electrical pump 2 pressurizes the hydraulic system A. When you operate the pumps to pressurize the hydraulic systems, you must obey these steps:
(1)
Make sure there are more than 250 gallons (1675 pounds/760 kilograms) of fuel in fuel tank 1 or 2. When the fuel temperature is more than 90°F (32.2°C), monitor the system B overheat indicator and turn the pumps off when the hydraulic fluid becomes too hot.
C.
This procedure contains pressurization of hydraulic systems A and B by the operation of the electrical pumps.
TASK 27-31-00-862-001
2. Remove the Pressure from Elevator Hydraulic Systems A and B___________________________________________________________
A. Special Tools and Equipment
(1)
F80049 - Flight Controls Lock Assembly
B.
References
(1)
29-09-00/201, Hydraulic Reservoir Pressurization System
C.
Access
(1)
Location Zones
101/102 Control Cabin
216 Main Wheel Well, LH
217 Main Wheel Well, RH
D.
Procedure
S 862-002
(1) Set the FLT CONTROL A and B switches on the P5 Pilots' Overhead Panel to OFF.
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A
737-300/400/500MAINTENANCE MANUAL
S 862-003
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6-2 Circuit Breaker Panel 1) SHUTOFF VALVES - FLT CONT (2 locations)
S 862-004
(3)
Set the HYD PUMPS A - ELEC 2 or the HYD PUMPS B - ELEC 1 switch on the P5 Pilots' Overhead Panel to OFF.
S 862-005
(4)
Operate the rudder pedals to decrease the remaining hydraulic system pressure.
S 862-006
(5)
If you will remove the hydraulic connections, do this task to remove the air pressure from the hydraulic systems A and B reservoirs: "Release the Pressure from the Hydraulic Reservoirs" (AMM 29-09-00/201).
S 492-023
(6)
Install the flight control lock assemblies (which is referred to as the "lock assembly") (Fig. 202):
(a)
Disconnect the electrical connector D818 from the flight controls system A shutoff valve (which is referred to as the "shutoff valve A").
(b)
Disconnect the electrical connector D820 from the flight controls system B shutoff valve (which is referred to as the "shutoff valve B").
(c)
Make sure that the manual override lever at the shutoff valves A and B is in position 2 (OFF position).
(d)
Install a lock assembly on each shutoff valve. 1) Install the lockpins.
TASK 27-31-00-842-024
3. Put the Elevator Hydraulic Systems A and B Back to the Condition Before_______________________________________________________________________ the Pressure Removal____________________
A. Special Tools and Equipment
(1) F80049 - Flight Controls Lock Assembly
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本文链接地址：737-300 400 500 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 2(97)
