NOTE: The right system ACMP (AC Motor Pump) may not provide
____ sufficient flow to drive the PTU to extend the flaps or they may move very slowly, depending on the internal leakage of the hydraulic system.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-22-00
 ALL  ú ú 01 Page 504 ú Sep 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 S 495-287

 (3)  In the electrical systems card file, P50, do this step if you use a service cart or alternating current motor pump (ACMP):
 NOTE: The card is accessed through the 119BL access panel
____
 (AMM 06-41-00/201).

 (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.
 S 215-012
 (4)  
Listen to the PTU in the left main wheel well to make sure it operates smoothly.

 S 215-341

 (5)  
Make sure the Manual lever/position indicator on the PTU Control Valve is in the open position.

 S 215-013

 (6)  
Make sure the POWER XFER UNIT message is not shown on EICAS after five seconds.

 S 215-014

 (7)  
Make sure the pressure indication for the left hydraulic system on EICAS is not less than 2600 psi.

 S 865-015

 (8)  
Put the flap lever on the control stand to the 30 degree position and make sure the flaps move to the fully extended position.

 S 865-016

 (9)  
Put the flap lever in the ZERO detent position and make sure the flaps move to the fully retracted position.

 S 865-017

 (10)
 Remove the hydraulic power from the right hydraulic system (AMM 29-11-00/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-22-00
 ALL  ú ú 01 Page 505 ú May 28/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 S 865-342
 (11)
 Make sure the Manual Lever/Position indicator on the PTU Control Valve moves to the closed position three seconds after removal of hydraulic power from the right system.

 S 095-289

 (12)
 In the electrical systems card file, P50, do this step if you use a service cart or alternating current motor pump:

 NOTE: Close access panel 119BL (AMM 06-41-00/201) after returning
____
 the card to normal configuration.

 (a)  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 siginal that the right engine is in operation.
 G. Do the Operational Test of the Manual Ground-Control System for the PTU
　
中國航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機(jī)維護(hù)手冊 液壓 CHAPTER 29 - HYDRAULIC POWER 2(126)