The minimum equipment list for my aircraft is;
10.2. MINIMUM EQUIPMENT LIST
Air speed indicator
Altimeter
Magnetic compass
Ball bank indicator
Tachometer
Oil temperature
Oil pressure
Cylinder head temperature
Fuel level indicator
Oil level indicator
Stall Warning device
I think I have had similar lists for all my previous aircraft, but there may have been the odd exception.
On LAA aircraft I think it is a rule that you have to have;
Air speed indicator
Altimeter
Magnetic compass
Fuel level indicator
Oil level indicator
Appropriate engine instrumentation
That is in case there is no minimum equipment list from the designer. Is this not also a CAA requirement?
Rod1