29-22-00
ALL ú ú 05 Page 515 ú Dec 20/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 865-208
(50)
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 215-209
(51)
Make sure the POWER XFER UNIT message is not shown on EICAS.
S 865-210
(52)
Operate the hydraulic service cart to decrease the pressure in the right hydraulic system to zero.
S 215-211
(53)
Make sure the PTU control valve moves to the CLOSED position. The valve must move to the CLOSED position in less than 5 seconds after the right system pressure decreases to the 0 to 200 psi range.
S 215-212
(54)
Make sure the POWER XFER UNIT message is shown on EICAS.
S 865-213
(55)
Pressurize the right hydraulic system with the hydraulic service cart to 3000 psi.
S 215-214
(56)
Make sure you can not hear the operation of the PTU.
S 865-215
(57)
Put the manual control switch for the PTU on the right side panel, P61, in the OFF position.
(58)
Make sure you can hear the operation of the PTU.
S 865-218
(59)
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 215-217
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-22-00
ALL ú ú 06 Page 516 ú Dec 20/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 215-219
(60)
Make sure the POWER XFER UNIT message is not shown on EICAS.
S 865-220
(61)
Open this circuit breaker on the P11 panel:
(a) 11D31, HYDRAULICS PTU CONT
S 865-339
(62) Return the toggle switch on the end of the right engine speed card (M10311) to the normal position or remove the jumper from the ground and 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.This removes the signal that the right engine is in operation.
S 865-330
(63)
Operate the hydraulic service cart to decrease the pressure in the right system to zero.
S 865-222
(64)
Operate the hydraulic service cart to decrease the pressure in the left system to zero.
S 095-223
(65)
Disconnect the pressure line of the service cart from the pressure hose of the left EDP.
(66)
Connect the pressure hose to the EDP (AMM 29-11-05/401).
S 865-331
(67)
Pressurize the right hydraulic system with the service cart to 3000 psi.
S 435-224
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
