HS 125-800 Question

[Hawker800]

Had an XS1 fail light. Aircraft started a slow turn to the right. It was in NAV mode. Heading mode stopped the turn. Never received an inverter fail light. Carried out manual procedures. Maintenance and tech rep said inverter issue. Replaced the inverter. Next flight same problem. Can anyone advise what the gremlin may be? Thanks for any assistance.

 

[getonit]

XS1 is a bus light, doesn't indicate the inverter failed. The AP should have defaulted to some other mode, like ROL, I think.

What else quit working?

We had problems with ours, and the MX guys started talking about a lot of other switchology and breakers in the hell hole, that at that point I knew nothing about. But I don't know why they replaced the inverter? But I am not a mechanic.

 

[HawkerF/O]

Had a similiar problem in 2004 as we were departing Dallas to take "The Hammer" to the GOP convention in NYC. Sorry for betraying so many good people.
The situation came up as I was testing the inverters on the preflight. They both worked, but one would not pick up the load of the other, and vice-versa. Everything ws cool as long as neither one failed. Called a good friend, a Hawker MX and ATP in the airplane as well. He broke out the MX manual and all it was was a tripped C/B in the hell hole. If I remember, the breaker was located in the aft hell hole. It was positioned really close to a fire bottle. Pushed the tripped breaker in, had MX sign it off, and I never experienced the problem again. Remember, the Hawker has old Technology that still works well today, so the problem is going to be simple. You just have to trick your mind into dumbing down so you can think in the most simple of terms to figure out the problem. I suspect the problem will be solved with one of the C/Bs in the hell hole that I described. There was a whole row of them back there. Good luck..........

XS1 is a bus light, doesn't indicate the inverter failed. The AP should have defaulted to some other mode, like ROL, I think.

What else quit working?

We had problems with ours, and the MX guys started talking about a lot of other switchology and breakers in the hell hole, that at that point I knew nothing about. But I don't know why they replaced the inverter? But I am not a mechanic.

 

[Hawker800]

Thanks for the info. Perplexing to say the least. Our CP who is also an A&P switched the inverters. So far so good. Two flights today and all went well. All the CB's in the rear were checked and found to be in working order. Good suggestion. See how things go. Don't like it when things do not stay broke.