How Did AVBLEND Earn Its FAA Approval?
In a four year test, Enstrom Helicopters, powered by Lycoming HIO-360-C1A engines, were flown in year-round conditions for Chicago's WGN Radio's traffic reports. One 12 oz can of AVBLEND was added to the engine oil at each 50 hour change interval up to the engine's TBO. To read more about this story, click here.
FAA inspectors performed two consecutive engine disassembly inspections. Both inspections (1,000 hours and 1,100 respectively) produced impressive results.
Less than .001 of an inch total wear between the critical exhaust valve stem-guide location was observed at both teardown inspection periods.
Exhaust and intake valves, guides, and seats showed minimal, if any, carbon and deposit buildup. Pistons, rings, ring lands, and combustion chambers also showed minimal carbon/deposit buildup and were in excellent condition.
All four cylinders still contained the original nitride-steel barrels and were used for five complete overhaul cycles, with no chroming or over sizing processes during engine service time.
Read the FAA Approval Letter for AVBLEND