S 976-118
(7) Measure the system gross leakage for the lateral flight control and write the value here:
Right _______________ GPM (Value No. 2)
S 866-119
(8)
Put the speedbrake lever at approximately the middle position between the ARMED and the UP detents.
S 976-120
(9)
Measure the leakage and write the value here:
Right _______________ GPM (Value No. 3)
S 976-392
(10) Subtract Value No. 2 from Value No. 3 and write the value here:
Right Value No. 3
minus Value No. 2 = _______ GPM (Value No. 4)
S 976-121
(11)
If Value No. 4 is less than -1.5 GPM, usually you must replace a spoiler PCA because of high seal leakage.
S 976-122
(12)
If Value No. 4 is more than 1.5 GPM, usually you must replace a spoiler PCA because of high null leakage.
S 976-123
(13)
If Value No. 4 is between the above 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 866-125
(15)
Open these circuit breakers on the overhead circuit breaker panel, P11 and attach DO-NOT-CLOSE tags:
S 866-124
(a) 11C6, FLT CONT ELEC 1L AC
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29-11-00
ALL ú ú 06 Page 637 ú Dec 20/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(b)
11C7, FLT CONT ELEC 1L DC
(c)
11C8, FLT CONT ELEC 2L AC
(d)
11C9, FLT CONT ELEC 2L DC
(e)
11G17, FLT CONT ELEC 1R AC
(f)
11G18, FLT CONT ELEC 1R DC
(g)
11G27, FLT CONT ELEC 2R AC
(h)
11G28, FLT CONT ELEC 2R DC
S 866-126
(16)
Turn the pilot's control wheel to the fully right position.
S 976-127
(17)
Measure the leakage and write the value here:
Right _______________ GPM (Value No. 5)
S 976-128
(18) Subtract Value No. 5 from Value No. 2 and write the value here:
Right Value No. 2
minus Value No. 5 = _______ GPM (Value No. 6)
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