When the ARB certified the aircraft in UK,
Indeed
Somehow or other, that process was never visited on the Chipmunk.
I was not aware of that history. I doubt that Donald George would have had any direct involvement .. small world, though, I completed my PPL at RNAC with Stan and Jack, many years ago, now.
Re: Southdown Engineering,
Ah, DL - of course - a fine and honourable chap, if ever there were one. Long time since he and I have crossed paths, hopefully he enjoys good health in his retirement ?
First person to hold a CASA delegation to sign off for a Type Certificate, other than a CASA employee
That's probably not quite the case. There was a number of OEM engineers who held FOT AP appointments. For instance, I had ANR 27/40/41 from the mid-70s, courtesy of the long-departed and illustrious Edward Mannix B. And the earlier chaps prior to me with that OEM, I am sure, would have predated DL's appointment.
However, can you provide some specifics re the suggestion regarding P-chart problems ?