Hello Xonboy,
Yes I was working with him at the Dubai Airwing, I worked for BHL for 12 years, before going direct contract on the Airwing fixed wing aircraft.
At the time your Dad was the Chief Engineer, I was already direct contract, but was operating out of the same small corrugated hangar that the Helis used.
Regarding the Riley Dove, your father told me that the twin Pioneers used to shed cylinders regularly due to shock cooling in the heavy rain in the wet season.
Of course this was before the Biafran war, and one of the jobs for the Dove was to fly engineers and parts to repair the Pioneers.
I have visited the Riley Dove at its final resting place in the school playing field at Uli airstrip in Biafra.(1970) I tried to remove the main entry door kick plate as a souvenir, but the screws were all corroded in and my presence was detected by the Nigerian Army soldiers, who chased me off. I did however manage to get a nice picture of it, which appears in the book "Shadows".
Tony