757
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.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-22-00
 ALL  ú ú 05 Page 512 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

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
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 液壓 CHAPTER 29 - HYDRAULIC POWER 2(130)