kootenay Posted June 13, 2008 Report Share Posted June 13, 2008 Any thoughts on what could be burning out the position lights on a Bell 206. Wiring seems ok, lost two lefts, and two rights in 60 days. I've heard people try and connect this with TR buzz? Appreciated your help Quote Link to comment Share on other sites More sharing options...
Gary Watson Posted June 13, 2008 Report Share Posted June 13, 2008 Any thoughts on what could be burning out the position lights on a Bell 206. Wiring seems ok, lost two lefts, and two rights in 60 days. I've heard people try and connect this with TR buzz? Appreciated your help Do the filaments look like they are shattered? Could be vibration-related. Does the a/c fly with the nav lights on all day? If not, try that as a hot filament will handle vibration more than a cold one Quote Link to comment Share on other sites More sharing options...
kootenay Posted June 13, 2008 Author Report Share Posted June 13, 2008 Do the filaments look like they are shattered? Could be vibration-related. Does the a/c fly with the nav lights on all day? If not, try that as a hot filament will handle vibration more than a cold one I'm not the engineer / Ops. - there is no buzz felt in the TR peddles. We haven't had the chance yet to hold a hand against vertical stab. feeling for a buzz. Yes - Lights are on full-time. Quote Link to comment Share on other sites More sharing options...
Elvis Posted June 13, 2008 Report Share Posted June 13, 2008 Maybe a dirty oil cooler fan is putting a high freq in the tailboom Quote Link to comment Share on other sites More sharing options...
picapart Posted June 13, 2008 Report Share Posted June 13, 2008 A tail rotor trunnion producing black or dark colored grease may also be a early warning sign of tail rotor trouble, light burning are also a good indication. Quote Link to comment Share on other sites More sharing options...
arctic_front Posted June 13, 2008 Report Share Posted June 13, 2008 As well as vibration issues, what is the voltage regulator set to? too high a voltage might shorten the lives of the bulbs. Usually, Bulbs are pretty tolerant, and radios and instruments are the first to be affected. Just a thought on the voltage, but vibration seems more likely. Added to What Elvis suggested, T/R driveshaft bearings can be harder to track down...but can cause a high freq vibration, as can engine sources. If you have a Chadwick 2000 or other vibration measuring tools that offer a full spectrum analysis can pin-point the Hertz of the source and you can determine what is spinning at that speed. Also, check your gear and see if it may give you a 2-per/rev. Good luck. Quote Link to comment Share on other sites More sharing options...
ray Posted June 14, 2008 Report Share Posted June 14, 2008 The position lights are grounded through the airframe. Check the attach bolts that attach the horizontal stabilizer to the tailboom. Make sure there is no paint at the contact areas. What I have found, and I have found a lot of this, is that a painted contact area makes for a poor contact, and increases the current draw on the buld, which will either blow out the bulb, or blow the breaker. Quite regularly. When I install a horizontal stabilizer, I always clean paint off the contact areas where the bolts go through. Also, check the wires inside the stabilizer, making sure it isn't chafing at the bottom of the stabilizer. This will also cause the bulbs to blow. Quote Link to comment Share on other sites More sharing options...
BRZRKR Posted June 14, 2008 Report Share Posted June 14, 2008 I've found the sme problem with paint, especially on the long rangers. I find our a-stars and 206's do this a lot when it rains, and the fonzie cheap fix of giving the stab a light smack on top brings them back on. This is usually indicative of poor ground. Quote Link to comment Share on other sites More sharing options...
T55 Posted June 22, 2008 Report Share Posted June 22, 2008 I had the same issue with a jetbuggy once. Went thru all the vib stuff to no avail. One day I noticed that the front of the nav light base could easily vibrate due to mounting screws being quite a way back from the front. I prosealed the front to keep the base from vibrating and never had an issue since. ......just the usual bulb life Quote Link to comment Share on other sites More sharing options...
Dzude Posted June 23, 2008 Report Share Posted June 23, 2008 I've seen the light bulb loose in its socket, try to bend the socket so the bulb fit tight in it. Quote Link to comment Share on other sites More sharing options...
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