a w ditor,
I stand corrected if the 125 was certificated by other than the Committee Against Aviation.
FCL certainly operated out of a small empire in/near Kingsway in London before the "Belgrano" was launched.
However, that's academic, SOMEONE who should have known better signed off the smoke removal mechanism.
My actions in the event of said smoke would have been to open the discharge valve, so dumping it out via the rear cabin (sorry Navs!) whilst closing rapidly with nearest airfield. Yes, the cabin would have climbed but it would anyway with the "ping-pong ball" lever fully open.
As the Dom Sqn UFSO, I asked to run a trial, on the ground, with a pressurised ' frame and harmless vegetable oil smoke released inside to illustrate the hazard.
Needless to say it was filed under 'too difficult' or more likely ' too embarassing' to the powers that be.
