(2)
Access Panel
119BL Main Equipment Center
D.
Prepare to Do a Test of the Parking Brake System
S 495-054
(1) Make sure the downlocks are installed on the nose and main landing gear (Ref 32-00-20/201).
S 495-055
WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOOR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
S 865-056
(3)
Supply electrical power (Ref 24-22-00/201).
S 615-057
(4)
If it is necessary, do the servicing for the parking brake
acccumulator (Ref 12-15-04/301).
(5)
Put the chocks below the wheels.
S 495-058
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S 865-060
(6)
Pressurize the right hydraulic system (Ref 29-11-00/201).
E.
Do the Test of the Parking Brake System
S 865-140
(1) Pull up on the parking brake handle and hold it.
NOTE: Do not operate the brake pedals.
____
S 215-141
(2)
Make sure that the parking brake light on the P10 panel does not come on.
S 865-142
(3)
Release the parking brake handle.
S 865-143
CAUTION: DO NOT TWIST THE PARKING BRAKE HANDLE OR USE TOO MUCH FORCE.
_______ IF THE HANDLE IS TWISTED OR PULLED WITH TOO MUCH FORCE, IT CAN CAUSE DAMAGE TO THE HANDLE LINKAGE.
(4)
Push the right brake pedal for the Captain or the First Officer.
(a)
Pull up on the parking brake handle.
(b)
Make sure the parking brakes cannot set.
(c)
Do these steps again with the left brake pedal for the Captain or the First Officer.
NOTE: There are two indications to look for to see if the
____ parking brake is not set. First, the brake pedals will go to their neutral position. Second the PARK BRAKE indicator light on the quadrant control stand panel, P10, will not come on.
S 865-061
CAUTION: DO NOT TWIST THE PARKING BRAKE HANDLE OR USE TOO MUCH FORCE.
_______ IF THE HANDLE IS TWISTED OR PULLED WITH TOO MUCH FORCE, IT CAN CAUSE DAMAGE TO THE HANDLE LINKAGE.
(5) Push fully the left and right brake pedals for the Captain or First Officer.
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S 865-118
(6) Pull the parking brake handle up.
S 865-119
(7) Release the brake pedals.
S 215-132
(8) Make sure the parking brake is set.
NOTE:____ There are two indications to look for to show that the
parking brake is set. The brake pedals will stay pushed in.
The PARK BRAKE indicator light on the quadrant control stand
panel, P10, will come on.
S 215-133
(9)
Make sure the pressure shown on the gage for the brake accumulator is between 2800 and 3200 psi.
S 215-131
(10)
Make sure the override lever on the parking brake valve is at the POS 2 (closed) position.
NOTE: The valve is on the forward wall of the right wheel well.
____
S 865-115
(11)
If it is pressurized, remove the pressure from the left hydraulic system (Ref 29-11-00/201).
S 865-116
(12)
After it has been pressurized for at least 10 minutes, remove the pressure from the right hydraulic system (Ref 29-11-00/201).
NOTE: It is necessary to operate the pumps for at least 10 minutes
____ to let the accumulator temperature become stable.
S 215-137
(13)
Make sure the accumulator pressure is not less than 2800 psi.
S 735-118
(14)
Write down the accumulator (brake) pressure.
S 735-119
(15)
Do a check of the brake pressure after one of the time periods that follow. If the necessary pressure drop for one time period is not within the limits, you can use the next time period.
(a)
After 10 minutes, the pressure drop must be less than 200 psi.
(b)
After 30 minutes, the pressure drop must be less than 350 psi.
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