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MAINTENANCE MANUAL
(b) Place the toggle switch on the end of the left engine speed card (M10298) in the test mode position or install a jumper between a ground and the test point J1 on the end of the left engine speed card (M10298).
NOTE: Depending on the model of the speed card being
____ used, the new cards have the toggle switch , older cards have a test point. Either the toggle switch or the jumper provides a signal that the left engine is in operation.
S 865-173
(14) Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:
(a) 11D31, HYDRAULICS PTU CONT
S 865-335
(15)
Pressurize the right hydraulic system with the hydraulic service cart to 3000 psi
S 215-174
(16)
Make sure you can hear the operation of the PTU.
S 215-175
(17)
Make sure the POWR XFER UNIT message is shown on EICAS.
S 865-176
(18)
Open this circuit breaker on the P11 panel and attach a DO-NOT-CLOSE tag:
(a) 11D31, HYDRAULICS PTU CONT
S 495-301
(19) In the electrical systems card file, P50, do this step:
(a) Place the toggle switch on the end of the right engine speed card (M10311) in the test mode position or install a jumper between a ground and the test point J1 on the end of the right engine speed card (M10311).
NOTE: Depending on the model of the speed card being
____ used, the new cards have the toggle switch , older cards have a test point. Either the toggle switch or the jumper provides a signal that the right engine is in operation.
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29-22-00
ALL ú ú 05 Page 512 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757
MAINTENANCE MANUAL
S 865-178
(20) Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:
(a) 11D31, HYDRAULICS PTU CONT
S 215-179
(21)
Make sure the POWER XFER UNIT message is shown on EICAS.
S 865-180
(22)
Push the ECS/MSG switch on the EICAS maintenance panel on the P61 panel. Push the AUTO EVENT READ switch, then push and hold the ERASE switch for approximately 3 seconds for each page of messages.
S 215-181
(23)
Make sure the POWER XFER UNIT message is not shown on EICAS.
S 215-182
(24)
Make sure you can hear the operation of the PTU.
S 865-183
(25)
Operate the hydraulic service cart which is connected to the left hydraulic system to supply at least 2000 psi.
S 865-302
(26)
Open the shutoff valve in the pressure line of the service cart.
S 215-184
(27)
Make sure the POWER XFER UNIT message is shown on EICAS.
(28)
Make sure you can hear the operation of the PTU.
S 865-186
(29)
Operate the hydraulic service cart to decrease the pressure in the right hydraulic system to zero.
S 215-185
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