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 NOTE: A positive value shows an increase in impedance and
____ will be a hill on the waveform. A negative value shows a decrease in impedance and will be a valley on the waveform.
 (d)  The TDR can also calculate and show the impedance, in ohms, at the cursor position on the applicable cable. 1) This function is available from the SETUP MENU. 2) The value will show under the 'distance to cursor' value on
 the LCD. 3) Most 50 ohm coaxial cable is manufactured to an impedance of 50+/-2 ohms.
 F. Put the Cable Back to its usual Condition
 S 082-005
 (1)  
Disconnect the TDR adapter cable from the breakout box.

 (2)  
Remove the breakout box.

 S 082-007

 (3)  
Remove the 50 ohm terminator (or jumper) from the other end of the applicable cable.

 (4)  
Install the applicable black box (AMM 20-11-22/401).

 (5)  
Connect the applicable cable at the two ends.

 S 092-006
 S 412-008
 S 432-009
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A
747-400 MAINTENANCE MANUAL
 FLIGHT CONTROL SURFACES SAFETY HARNESS RECEPTACLE - MAINTENANCE PRACTICES
_________________________________________________________________________
 1.  General
_______
 A.  This procedure containes these tasks:
 (1)  
Wing/Horizontal Stabilizer Safety Harness Attachment.

 (2)  
Horizontal Stabilizer Surface Safety Harness Attachment.

 B.  Receptacles for the safety harness are on the top surfaces of the wing and horizontal stabilizer. Maintenance persons who work high above the ground will attach their safety harnesses to these receptacles.
 TASK 20-11-33-402-001
 2.  Wing/Horizontal Stabilizer Safety Harness Attachment (Fig./201)
____________________________________________________
 A.  General
 (1)
There are four receptacles on the wing upper surface and four receptacles on the horizontal stabilizer upper surface.

 (2)  
The safety harness attach lanyard uses a lock assembly.

 B.  Equipment
 (1)  24MIT65B00003 Attach Lanyard - Safety Harness
 Wing/Horizontal Stabilizer

 C.  Procedure
 S 422-003
 WARNING: DO NOT WALK ON THE WINGS OR THE HORIZONTAL STABILIZER.
_______ ICE OR SNOW ON THESE SURFACES IS NOT SAFE. MAINTENANCE PERSONS CAN FALL WHICH MAY CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 WARNING: USE A MAN LIFT TO ATTACH THE SAFETY HARNESS FITTINGS TO
_______ THE RECEPTACLES. MAINTENANCE PERSONS CAN FALL WHICH MAY CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  Install the safety equipment.
 (a)  
Put on the full body safety harness.

 (b)  
Attach the hook end of the lanyard to the body harness.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400
MAINTENANCE MANUAL

 (c)  
Attach the opposite end of the lanyard to the anchor fitting in the attachment receptacle on the surface you are working.

 (d)  
Adjust the lock assembly until it is aligned with the airplane skin.

 NOTE: If the lock assembley is not aligned, there is a risk
____ the lock assembly will not engage correctly.
 TASK 20-11-33-402-005
 3. Horizontal Stabilizer Surface Safety Harness Attachment (Fig./202)
_______________________________________________________
 A. General
 (1)  
There are four receptacles on the horizontal stabilizer upper surface.

 (2)  
The safety harness lanyard uses a lock assembly.

 B.
Equipment

 (1)  
G57001 Safety Lanyard Equipment - Horizontal Stabilizer Upper Surface

 C.
Procedure

 S 422-006
　
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