false Indications

[Nomex]

Puddle Jumper: Leaving the gen off and when the battery dies will cause all sorts of confusing indicators. Two first clues (in a 206) will be poor VHF transmission & reception, boost pump(s) stop (caution on) - it happened to me but fortunately caught it at this point after checking systems, and yes I have heard of engine out, low rotor and other lights/noises and not all consistant.......
My advice is do a regular pre-landing, en route, pre-take off check always - I have caught the gen switch off numerous times during these checks - all as the result of the switch tripping off by itself due to malfunction etc..

 

[Puddle Jumper]

Nomex

Thanks for the reply....and yes I am well aware of the ususal first sighns of a generator off or a failure. During my first solo ride during flight training I had a generator not charging the battery properly....I could recieve fine but couldn''t transmit very well...it takes a lot of juice to operate those power transistors on the transmit side of the radio. I can''t remember why but I heard that engine out is quite common in older ships when having a generator off or during a failure....supposidly the rotor low horn is one of the first things to go crazy...I can''t remember why..I guess I will just have to ask.

 

[412driver]

yes, you will sense some serious yaw......

yes, it will get quiet..........

just leave the throttle alone and the story Jammedleft verified is why i believe in that.............

 

[DGP]

puddle jumper...I believe when the voltage drops below 14 volts the reverse current relay kicks off line and this shuts down most of the remaining voltage that is left in the battery...at which time the rpm senors will have no voltage going to them and on goes the warning lights...all though they will be dimmer than usuall...all of this will be very irratic due to the low voltage...the rpm sensers run on very low voltage,so when this starts happening your jetbox is not a happy camper and soon will want to be on the ground.

also on the older jetbox's the engine out warning system can be silenced and still have the caution lights work by using the instument light switch on the overhead panel...turn it full on...then hit the caution light toggle switch on the dash...with the caution breaker pulled out of course...this only works on the old models...low voltage on these causes all kinds of strange lights because of that system...the oldest one I flew was #71...I had a complete power failure(electrical) in # 212...all kinds of weird things were happening...and it was real ugly down below...just glade Mr.Allison was still runnin

 

[Randy_G]

There will be a large amount of very sudden yaw. Then the low rotor & engine out horns start blasting in your ears. The engine may get quiet, but those horns are sure loud !!


Cheers

 

[Bruised Armpit]

How many of you are flying around out there with your low rotor horns deactivated? I know some operators that do this.

 

[Toni]

407 driver!!!
Please more details and a bit more exactly!!
Do you mean de 206 was nose down??I think that I have heard that if you have an engine failure in the hover with lots of power the first thing is that the nouse goes down????with the yaw of corse!!!

 

[CTD]

What? Aside from being illegal, words can''t describe how stupid that is. Actually, some words can, but I can''t use them here.

 

[T-rex]

Bruised armpit,
Not too sure whom you have been flying with but disconnecting the low rotor horn? Never heard of any operater doing that! As CTD put it....very stupid! A quick pen mark in the journey log." Low rotor horn unservicable."

 

[407 Driver]

I had a 206 engine fail in the hover at max power, there was NO problem determining that a power loss had occured. Suddenly, and I mean really suddenly, we were looking straight out the windshield at a view that used to be 90 degrees out the passenger window.
I''m not sure if the horns or the screaming was louder....

 

[CTD]

What they had in the past doesn''t matter, but if it came with it and references are made in the RFM, you must have it installed and working.

A 1965 Ford pick-up didn''t come with seat belts, and if you drive one today, you don''t need a seat belt. But don''t try it in you 2003 model.

 

[4961]

Good point, let me rephrase that...I''m 10000% sure that I''m correct on this, so don''t mess with me OK. What was I talking about??.....Ummmm stand by one

 

[4961]

I may be wrong, so don''t slam me if I am. I think I remember that some very old A models don''t even have a low rotor horn to begin with, even after they have been converted.

 

[407 Driver]

4961, why are you special?
Here, we even slam people who are CORRECT!

 

[Flinger]

I''ve heard of ''Engine Out'' horns being deactivated but not ''Low Nr'' Horns.

BA, is this what you were thinking about? (BA... heheh "I pity the fool....)