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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 485-083-N00
 (2)  
Do the steps that follow to install the trim balance equipment:

 (a)  
Disconnect the N1 probe cable from the N1 probe.

 (b)  
Connect the MTI 8218-5203 N1 breakout cable to the N1 probe.

 (c)  
Connect the MTI 8218-5203 N1 breakout cable to the wiring harness.

 (d)  
Route the MTI 8218-5203 N1 breakout cable as necessary so that the connector will exit the reverser doors at the overboard drain access door.

 (e)  
Install the MTI 8218-5202 "P" Flange vibration pick-up cable as necessary so that the connectors will exit the reverser doors at the overboard drain access door.

 (f)  
Install the MTI 8218-5201 "A" Flange vibration pick-up cable as necessary so that the connector will exit between the cowling at the 6 o'clock position.

 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 TO CLOSE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 CAUTION: MAKE SURE THAT THE CABLES DO NOT GET CAUGHT TIGHTLY IN THE
_______ COWLING, THRUST REVERSER OR LATCHES. TIGHT BENDS CAN CAUSE DAMAGE TO THE CABLES.
 (g)  
Close the thrust reversers (AMM 78-31-00/201).

 (h)  
Close the core cowl panels (AMM 71-11-06/201).

 (i)  
Use tie raps to the MTI 8000-4225 Charge Amplifier tightly to the drain mast grating on the overboard drain access door.

 (j)  
Close the fan cowl panels (AMM 71-11-04/201).

 (k)  
Do the activation procedure for the thrust reversers
 (AMM 78-31-00/201).

 (l)  
Connect the MTI 8218-5201 "A" Flange vibration pick-up cable to the channel 1 connector on the MTI 8000-4225 Charge Amplifier.

 (m)  
Connect the MTI 8218-5202 "P" Flange vibration pick-up cable to the channel 2 connector on the MTI 8000-4225 Charge Amplifier.

 (n)  
Connect the MTI 8218-5203 N1 breakout cable to the MTI 8900-5035 Engine Jumper Cable.

 (o)  
Connect the MTI 8900-5035 Engine Jumper Cable to the MTI 8000-4225 Charge Amplifier.

 (p)  
Connect the MTI 8900-5034 Engine Interface Cable to the MTI 8900-5035 Engine Jumper Cable.

 (q)  
Use tape to attach the Engine Interface Cable up the side of the cowl and pylon to the wing.

 (r)  
Attach the Engine Interface Cable along the wing, and into the leading edge door on the aircraft's wing, or above the wing door.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
CAUTION:_______DO NOT CLOSE THE DOOR FULLY. IF YOU CLOSE THE DOOR FULLY, THE DOOR CAN CAUSE DAMAGE AND FAILURE TO THE CABLE.
 (s)  
Put the MTI 7000-4133 PBS-4100 laptop computer, and the Data Acquisition Unit (DAU) near the cockpit.

 (t)  
With the extension cord and adapter, connect the DAU, and the laptop computer to 115V 400HZ power in the cockpit.

 (u)  
Connect the MTI 8900-5034 Engine Interface Cable to the MTI 8900-5035 Jumper Cable.

 (v)  
Connect the MTI 8900-5035 Jumper Cable to the PBS-4100.

 NOTE: Refer to the PBS-4100 equipment manual for installation
____ instructions of the PBS-4100.
 S 975-084-N00
 (3)  
Make a record of the date, airplane, and engine date, airplane, and engine that will be balanced.

 G.
As-Is Trim Balance Survey.

 S 975-085-N00
 (1)  
Do the steps that follow to do the As-Is Trim Balance Survey:

 (a)  
Thermally stabilize the engine:

 NOTE: You must have a thermally stable engine before you
____
　
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