landing gear trucks show 1400 - 2200 psi. 2) Make sure the force on the pedal is 48 - 60 pounds.
(k)
Release the pedal.
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747-400 MAINTENANCE MANUAL
(l) Set the parking brake. 1) Make sure the angle of the captain's left pedal is
12.0 - 14.5 degrees.
(m)
Release the parking brake.
(n)
Remove the pressure from hydraulic system No. 4
(AMM 29-11-00/201).
(o)
Operate the brakes until the HYD BRAKE PRESS gage shows the precharge pressure for the accumulator (Fig. 503).
(p)
Pressurize hydraulic system No. 1 (AMM 29-11-00/201).
(q)
Make sure the pressure indication for hydraulic system No. 1 on EICAS shows 2900 - 3150 psig.
(r)
Push the captain's left pedal forward to an angle of 4.5 - 5.5 degrees. 1) Make sure the pressure gage on each brake on the left main
landing gear trucks show 500 - 700 psig. 2) Make sure the force on the pedal is 30 - 36 lbs.
(s)
Push the Captain's left pedal forward to an angle of 8.5 - 9.0 degrees. 1) Make sure the pressure gage on each brake on the left main
landing gear trucks show 1400 - 2200 psig. 2) Make sure the force on the pedal is 48 - 60 lbs. 3) Release the brake pedal.
(t)
Remove the tool.
S 735-041
(7)
Do the steps that follow for a test of pedal force and distance (right side):
(a)
Install the protractor tool on the Captain's right brake pedal.
(b)
Install the spring scale on the Captain's right pedal.
(c)
Push the Captain's right pedal forward to an angle of 4.5 - 5.5 degrees. 1) Make sure that the pressure gage on each brake on the right
main landing gear trucks show 500 - 700 psig.
2) Make sure the force on the pedal is 30 - 36 lbs.
(d)
Push the Captain's right pedal forward to an angle of 8.5 - 9.0 degrees. 1) Make sure the pressure gage on each brake on the right main
landing gear trucks show 1400 - 2200 psig. 2) Make sure the force on the pedal is 48 - 60 lbs. 3) Release the brake pedal.
(e)
Pressurize hydraulic system No. 4 (AMM 29-11-00/201).
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A
747-400
MAINTENANCE MANUAL
(f)
Make sure the pressure indication for hydraulic system No. 4 on EICAS shows 2900 - 3150 psig.
(g)
Make sure the HYD BRKE PRESS gage on the P1-4 panel shows 2900 - 3150 psig.
(h)
Push the Captain's right pedal forward to an angle of 4.5 - 5.5 degrees. 1) Make sure the pressure gage on each brake on the right main
landing gear trucks show 500 - 700 psig. 2) Make sure the force on the pedal is 30 - 36 pounds.
(i)
Push the pedal forward to an angle of 8.5 - 9.0 degrees. 1) Make sure the pressure gage on each brake of the right main
landing gear trucks show 1400 - 2200 psig. 2) Make sure the force on the pedal is 48 - 60 lbs.
(j)
Release the pedal.
(k)
Set the parking brake. 1) Make sure the pedal angle is 12.0 to 14.5 degrees.
(l)
Release the parking brake.
(m)
Remove the pressure from hydraulic system No. 1 and 4
(AMM 29-11-00/201).
(n)
Operate the brake pedals until the HYD BRAKE PRESS gage on the P1-4 panel shows the precharge pressure for the accumulator.
(o)
Push the Captain's right pedal forward to an angle of
10.5 - 11.5 degrees.
1) Make sure the force on the pedal is 21 - 30 lbs.
(p)
Slowly release the pedal until the angle is 0.5 - 1.5 degrees. 1) Make sure the force on the pedal is 6 - 9 lbs.
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本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊 起落架 LANDING GEAR 6(48)
