Vickers Viscount-Aviation's Aristocracy

[avionic type]

We in BEA used to do twin lower spar changes plus a check 4 on the 700 series in 6 weeks in the late 50s we were lucky in the respect that the planning departments supplied us with the correct jigs and tools to do the job the 2 big tedious jobs were the removal of the main electrical panels under the floor in the center section to gain access to the bolts joining the center section and the wing spar and making the templates from the old spar and then drilling the holes in the in the blank new spar one slip and that was a few thousand quid down the drain but it never happened. Don't think any airline would tackle those type of tasks now it would go back to the manufacturer