Cable tensioning tool 737-ALL

Whenever new aileron bus cables are installed, they need to be double-tensioned first; about 300 lbs (Classic) and over 400 lbs (NGs)- temperature variations aside. It can be quite difficult to rotate the turnbarrel whilst maintaining anti-rotation control of the two cables at each end.

The tool is made from a MS21914-6 hydraulic plumbing ‘B’ nut. A slot is cut down the side to allow the nut to fit onto the cable and a hole drilled to match the size of hole in the turnbarrel.

The nut is simply fitted onto the cable, slid onto the turnbarrel and then secured with a split pin, drill shank, etc. A 11/16″ open-end spanner is used on the nut.
The same principal can be used for use on spoiler cable turnbarrels, using smaller nuts.

I wouldn’t be surprised if some tool maker made a mass-produced version. But there you go…most of us just want to keep it simple and help others, with no intention of commercial gain! Thanks to Andreas from Australia for this input ! 

Click on the pictures to see a large version of them.

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