(g)  
Turn the alternate flaps/slats position selector switch to the 20-unit position.

 (h)  
Make sure the flaps and slats move to the correct position.

 (i)  
Turn the alternate flaps/slats position selector switch to the 15-unit position.

 (j)  
Make sure the flaps and slats move to the correct position.

 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES
_______ WHEN HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO A PERSON OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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757 MAINTENANCE MANUAL
 (k)  
Pressurize the left hydraulic system (AMM 29-11-00/201).

 (l)  
Push the arming switches for the flap and slat alternate drives, on the P3 panel, to disarm the flap and slat alternate drives.

 (m)  
Make sure the flaps and slats move to the fully UP position.

 (n)  
Turn the alternate flaps/slats position selector switch to the NORM position.

 TASK 27-51-00-825-007
 3.  Adjustment of the TE Flap System________________________________
 A.  General
 (1)  
The flap system is correctly adjusted when the conditions that follow are correct:

 (a)
With the flaps in the fully retracted position:

 1)  The angle between the up stops, on the ballscrew U-joints for the flap drive system, and the ballnuts is between 45° and 135°.
 2)  All the ballnut up stops are less than 20° of each other.
 (b) With the flap control lever in the 1-unit detent:
 1)  The cable tension is in the tolerance limits given in the temperature tension chart (Table 2)
 NOTE: Refer to AMM 20-10-03/401 for instructions
____ on control cable removal/installation.
 2)  The rig pin TE1 can easily be put into the power drive unit (PDU) for the TE flaps.
 (c)  With the flap control lever in the zero (FLAPS UP) detent and the left hydraulic system pressurized: 1) The index mark on the output cam of the PDU is aligned with
 the index mark on the PDU case (Index marks #1).
 B.  Equipment
 (1)  
TE Flap Torque Tube Clamps from Set B27055-1

 (a)  
Outboard TE Flap Torque Tube Clamp - B27055-2

 (b)  
Inboard TE Flap Torque Tube Clamp - B27055-3

 (2)  
Rig Pins from Set B20003-XX (Ref 20-10-24):

 (a)  
LE1 - B20003-3

 (b)  
TE1 - B20003-53

 C.  
References

 (1)  
AMM 20-10-03/401, Control Cables - Removal/Installation

 (2)  
20-10-24/201, Rig Pins

 (3)  
24-22-00/201, Electrical Power - Control

 (4)  
27-51-02/501, Inboard Trailing Edge Flap

 (5)  
27-51-14/501, Outboard Trailing Edge Flap

 (6)  
27-51-27/201, Trailing Edge Flap Power Drive Unit Components

 (7)  
27-58-03/401, Flap Position Transmitter

 (8)  
27-81-00/201, Leading Edge Slat System.

 (9)  
27-81-00/501, Leading Edge Slat System

 (10)
 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 (11)
 32-00-15/201, Landing Gear Door Locks

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-51-00
 ALL  ú ú 01 Page 518 ú Sep 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 (12)
 32-00-20/201, Landing Gear Downlocks

 D.
Access

 (1)  
Location Zones
 143 Left MLG Wheel Well
 197/198 Wing to Body - Aft Lower Half (Left/Right)
 211/212 Control Cabin - Section 41 (Left/Right)
　
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