S 866-087
(4)
Put the control wheel in the neutral position and do not operate the other flight controls.
(5)
Measure the system gross leakage and write the value here:
S 976-088
Center _______________ GPM (Value No. 1)
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MAINTENANCE MANUAL
S 866-089
(6) Put the C FLT CONTROL SHUTOFF switch on the P61 panel to OFF.
NOTE: This removes center system pressure from the empennage flight
____
controls.
S 976-090
(7) Measure the system gross leakage for the lateral flight controls and write the value here:
Center ______________ GPM (Value No. 2)
S 866-091
(8)
Put the speedbrake lever at approximately the middle position between the ARMED and the UP detents.
S 976-092
(9)
Measure the leakage and write the value here:
Center _______________ GPM (Value No. 3)
S 976-093
(10) Subtract Value No. 2 from Value No. 3 and write the value here:
Center Value No. 3
minus Value No. 2 = _______ GPM (Value No. 4)
S 976-094
(11)
If Value No. 4 is less than -0.75 GPM, usually you must replace a spoiler PCA because of high seal leakage.
S 976-095
(12)
If Value No. 4 is more than 0.75 GPM, usually you must replace a spoiler PCA because of high null leakage.
S 976-096
(13)
If Value No. 4 is between the above PCA limits, you can not make a decision about PCA replacement until you do the Full Hydraulic System Internal Leakage Check and Isolation of Components with High Leakage procedure.
(14)
Put the speedbrake lever to the down-and-locked position.
S 866-097
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