S 865-090
(3)
Pressurize the left hydraulic system and reservoir (AMM 29-11-00/501).
S 735-042
(4)
Do a test of the Alternate Brake Hydraulic Indication
(a)
Make sure that the left system pressure shown on the EICAS maintenance page increases to 2850 to 3150 psig.
(b)
Make sure that the right system pressure shown on the EICAS maintenance page is less than 200 psig.
(c)
Make sure that the LEFT SYS PRESS light is off.
(d)
Make sure that the RIGHT SYS PRESS light is on.
(e)
Make sure that the BRAKE SOURCE light on P3 panel is off.
(f)
Make sure that the pressure at each wheel brake is not more than 75 psig.
(g)
Remove the pressure from the left hydraulic system and reservoir (AMM 29-11-00/501).
(h)
Make sure that the LEFT SYS PRESS and RIGHT SYS PRESS lights are on.
(i)
Make sure that the left and right pressure on the EICAS maintenance pages is less than 200 psig.
(j)
Pressurize the right hydraulic system and reservoir
(AMM 29-11-00/201).
S 735-045
(5)
Do a test of the Normal System Braking
(a)
Measure the brake pedal force and travel for each brake pedal. Make sure that each pedal meets the requirements in Table 2. 1) Attach a protractor to the brake pedal to measure the
travel (position). 2) Attach a spring scale to the brake pedal to measure the pedal forces.
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MAINTENANCE MANUAL
~.............................................................................. | Table 2 | ................................................................................ | *[1] | *[2] | ................................................................................ | | Brake Pedal | Brake Pedal | Brake | Brake Pedal | | Pedals | Travel (DEG) | Force (LBS) |Pressure (PSIG) | Force (LBS) | ................................................................................ |Captain's, | | | | | |First Officer's | 5 Maximum | 34 (|4) | 500 (|50) | 51 (|6) | ................................................................................ |Captain's, | | | | | |First Officer's | 12 Maximum | 75 (|10) | 2800 (|50) | 113 (|15) | 2................…..............….............…................…...............1
*[1] The pedal force must be measured by the load applied
perpendicular to the tip of the pedal, 8.4 inches from the pivot.
The brake pressure is the value shown at each wheel brake gage.
*[2] The brake pedal force measured using the J32001-39 equipment. The
load on the J32001 is located 5.58 inches from the pedal pivot.
(b)
Make sure that each wheel brake pressure is not more than 75 psig after you release the brake.
(c)
Fully push in and hold the Captain's brake pedals against the stops.
(d)
Make sure that the brake pressure at each wheel brake is within |100 psi of the system supplied pressure as shown on the brake pressure gage.
(e)
Look at the wear indicator pin on each brake to make sure that each brake has set.
(f)
Release the brake pedals.
(g)
Make sure that the pressure at each brake is not more than 75 psig.
(h)
Look at the wear indicator pin on each brake to make sure that each brake has released correctly.
(i)
Repeat above steps (c) thru (h) with the First Officer's pedals.
S 865-047
(6)
Make sure that the parking brake accumulator is fully charged per the placard instruction (AMM 12-15-04/301).
(7)
Pressurize right hydraulic system and reservoir (AMM 29-11-00/201).
S 865-049
(8)
When the parking brake accumulator pressure becomes stable, remove the right system hydraulic power (AMM 29-11-00/201).
S 865-048
NOTE: The accumulator pressure is stable when the pressure shown on
____ the accumulator pressure gage has not changed in 2 minutes.
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S 735-046
(9)
Do a test of the Accumulator Braking
(a)
Make sure that the BRAKE PRESS gage indication is at least 2800 psig.
(b)
Push both brake pedals to the stops, 2 times.
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