Decca Navigator also had one !
Dan Air lost one when the flap cross shaft sheared allowing one side flaps to retract on landing.
There were some spectacular pictures of this where it scythed across several aircraft.
The engine was a Bristol Centaurus Sleeve valve radial
With Autair the TBO was 2,200 hours compared with 1,400 on the DC3 P&W 1830
3 aircraft operating 2,500 hours a year had 3 unscheduled engine changes in 4 years
