S 025-428

 (3)
Remove the force gage and control wheel adapter equipment.

 S 865-364

 (4)  
Remove the power from the left, right, and center hydraulic systems if it is not necessary (AMM 29-11-00/201).

 S 215-202

 (5)  
Make sure that these circuit breakers on the P11 panel are closed:

 (a)  
11B19 or 11A19, STAB TRIM ALT (IF INSTALLED)

 (b)  
11C12, STAB TRIM SHUTOFF LEFT

 (c)  
11C13, STAB TRIM SHUTOFF RIGHT

 (d)  
11C13, STAB TRIM SHUTOFF RIGHT

 (e)  
11H11 or 11C05, STAB TRIM CONT L

 (f)  
11H20, STAB TRIM CONT R

 S 215-203
 (6)  
Make sure that the L, R, and C FLT CONTROL SHUTOFF switches on the P61 panel are at the ON position.

 S 215-204

 (7)  
Make sure that the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the P10 panel are in the NORM position.

 S 415-205

 (8)  
Close the access door for the forward stabilizer compartment, 311AL (AMM 06-42-00/201).

 TASK 27-31-00-735-201
 6. Elevator Pressure Bypass Valve Test (Fig 502, Fig 509)
 NOTE: This is a scheduled maintenance task.
____
 There are two procedures supplied to test the elevator pressure bypass valve. You can use Procedure 1 or Procedure 2.
 Procedure 1 uses the pogo compression/extension tool.
 Procedure 2 uses a pressure gage teed to the hydraulic line.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-31-00
 ALL  ú ú 10 Page 582J ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 A. Equipment
 (1)  
Gage Assembly (linear measurements for the
 stabilizer ballscrew) - B27039-3

 (2)  
Pogo Compression/Extension Tool - B27032-9
 (3 necessary)

 (3)  
Tee Fitting - NAS1763J0606 (or equivalent steel or titanium fitting)

 (4)  
Pressure Gage - Capable of 4000 +/- 50 psi (27,600 +/- 250 kPa) (commercially available)

 B.
References

 (1)  
AMM 24-22-00/201, Electrical Power - Control

 (2)  
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 C.
Prepare for the Test (Procedure 1 - Pogo Tool Method)

 S 865-353
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 215-354

 (2)  
Make sure that these circuit breakers on the overhead panel, P11, are closed:

 (a)  
EICAS (6 locations)

 (b)  
11C12, STAB TRIM SHUTOFF LEFT

 (c)  
11C13, STAB TRIM SHUTOFF RIGHT

 (d)  
11H17, FLT CONT SHUTOFF TAIL LEFT

 (e)  
11H18, FLT CONT SHUTOFF TAIL CTR

 (f)  
11H28, FLT CONT SHUTOFF TAIL RIGHT

 (g)  
11K9, LEFT ENGINE OIL PRESS

 (h)  
11K35, RIGHT ENGINE OIL PRESS

 S 215-356
 (3)  
Make sure that the L, R, and C FLT CONTROL SHUTOFF switches on the right side panel, P61, are at the ON position.

 S 215-357

 (4)  
Make sure that the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the control stand panel, P10, are at the NORM position.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-31-00
 ALL  ú ú 09 Page 582K ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 S 865-358
 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 PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
 (5)  
Pressurize the left, right, and center hydraulic systems
 (AMM 29-11-00/201).
　
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