Its aging craft are in need of parts for engines and American-made avionic equipment.

When a complex piece of avionic equipment is introduced into service a suite of automatic test equipment programmes is written for each circuit board.

The programme began approximately one year ago and focussed on support to automated test (ATE) of avionic equipment.

In 1976, testing on the material and the selection of electronics and avionic equipment to be used for the airframe were undertaken.

Similarly, tri-national worksharing was used for engines, general and avionic equipment.

A projected interceptor version of the S-2, with "Izumrud" radar and avionic equipment in a re-configured nose section.

Specialist electronic, optronic and avionic equipment was also installed within these new workshops.

Nose lengthened to accommodate more baggage, avionic equipment, and to improve weight and balance.