Since you are located in the UK the requirements may be a little different. Go to the US FAA website (
FAA: Home) and open the Type certificate data sheets (TCDS) for the Enstrom. There are very few life limit items on this helicopter. Some have hour requirements so high, they might as well be on condition. Like main rotor blades are 95,000 hours. Yes that is the actual number. The only mandatory normal inspection is the 100 hour/annual inspection.