Would appreciate some advice from those with Rotax experience.
Took a first-time passenger up for a spin in the 503 Redback this morning. Here is how it went:
Total time = 112 hours - but is 2003 model. Plugs and all fuel lines replaced at 74 hours.
Passenger 96kgs; me 76kgs - but compensated by leaving fuel at 20L mark (Holds 40L).
8:15am - Air temp at ground level 20oC. Clear, light Easterly
Pre-flight done; tested both ignition systems at 4,000 RPM
Airstrip alt. 3,000'. Took off and climbed to 1500 AGL at 6,000RPM, eased to 5,500 but still in steady climb, THEN after total time in air of 6-7 minutes, engine died to a rough idle; nose down, tried throttle on-off still rough but picked up to 2,500RPM.
Did a 180o turn and headed for my farm strip. Did a glide in 'no power' approach (Didnt bother trying throttle again as I figured best to go straight in rather than regain power and fly away from the strip only to find it 'stops' again).
Landed OK; taxied to bottom end of strip (700m long), then with passenger still on board did 2 rapid ground runs at varying throttle settings = no problem or misfire.
So then we put it in the hanger and did some checks:
Fuel drain cock - no dirt
Removed fuel filter - tiny specs of dirt only
Removed both float bowls - no dirt
Checked plugs (20 hours since last replaced) - no problems
Noted that circuit breaker was 'out' - depressed it to reset. But remember that the engine was still idling and had 'normal' power after landing - even with circuit breaker out.
So, where to from here??? I know that the fuel pumps on 503s often give up after 200 - 300 hours or so, so figure I should replace it. But other than that what else can I look at???
Appreciate any advice :;)2:
Cheers
Chris