technical help for a helo pilot
Hi all,
Bit of a tricky one to deal with if you're not an engineer! (pilot only)
I was doing ground runs on a B206 after a 100 hour inspection the other day.
Igniter pulled, pushed starter to do the oil bleed. After 2 attempts only 1 teaspoon of oil (usually 1/2 a quart)
Pushed the machine into the hangar. The engineer remembered he had changed the oil check valve clamp. The clamp was of a smaller type. Problem solved with a new clamp as the next bleed showed a 1/2 quart of oil.
All set for a normal start, after 1 minute at idle the engine chip came on. The engineer cleaned the plug the the same thing happened twice after. He pulled the oil filter to find an alarming amount of fine shavings.
Pulled the engine and sent it to an Allison engine shop. The number 8 bearing was replaced. On the test bed all scavenge pumps were working fine, the only thing replaced was the bearing and the OIL CHECK VALVE!
Before the 100 hour the machine run as per normal with no chip lights.
As I am not in any way qualified to know whether it was the engineers fault I was wondering if any of you guys could give me a possible answer.
Its a difficult one and the last thing I want to do is blame somebody for no reason.