"[2] Powered by two Alvis Leonides radial engines, the Twin Pioneer was a high-wing cabin monoplane with a triple fin and rudder assembly and fixed tailwheel undercarriage.

[4] In 1958, the 33rd aircraft was used as a prototype for the Series 2 with Pratt & Whitney Wasp R-1340 radial engines of which 5 had been ordered by Philippine Air Lines.

[7] Early in its operational life in 1957 the Twin Pioneer suffered two fatal accidents due to fatigue failure which caused the outer panel of the wing to detach from the aircraft in flight.

[11] The Twin Pioneers were employed in moving troops and supplies around the wilderness and on occasions lending support to the Sultan of Oman.

A series of double engine failures caused problems with the squadron losing two aircraft on the same day.

The SRCU (Short Range Conversion Unit) at RAF Odiham also flew three Twin Pioneers for aircrew training.

One Twin Pioneer served as a STOL training aircraft with the Empire Test Pilot School (ETPS) at RAE Farnborough for many years.

[11] Australia Austria Canada Ecuador Iceland Indonesia Iran Iraq Kuwait Laos Malaysia Nepal Netherlands New Guinea Nigeria Crown Colony of North Borneo Norway Philippines Sierra Leone Switzerland United Kingdom A Mk 1 aircraft is privately owned and is in open storage on a private airfield in Queensland Twin Pioneer Mk 3 FM1001 is in the collection of the Royal Malaysian Air Force Museum, located since 2021 at RMAF Sendayan, but the museum is closed Twin Pioneer Mk 2 G-APRS (G-BCWF) was airworthy in the collection of the Classic Air Force, Coventry, England.