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Subject: Bell 430 phantom chip lights
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ThemickUser is Offline
JH Newbie
JH Newbie
Posts:2

06/10/2008 12:16 AM  
Hi, I am new to the Bell 430 and seem to be having a tough time nailing down the cause of a series of phantom chip faults on the mast bearing, left quill and TGB. We have run the wires from one end to the other, changed chip detector power supplies, changed chip detectors, replaced ground terminals, replaced splices, and anything else we can think of and still seem to get chip faults...mostly around 3am. Does anyone have more experience that would lead us to a culprit as we are getting desperate to find an answer. Mick San Antonio, TX
ctlscollinsUser is Offline
JH Newbie
JH Newbie
Posts:1

06/11/2008 6:56 PM  
Mick, Still getting used to the 430 myself but it sounds like you have changed just about everything but the IIDS. As I understand the system, if you still have a chip "light" on the IIDS with the detectors disconnected the problem is with the IIDS. Good luck! Chris
pull-upUser is Offline
JH Member
JH Member
Posts:6

06/11/2008 9:07 PM  
I had a similar problem with a 222U. It turned out to be the pilot kept his wallet in the pocket on his flight suit and he would bump the fuzz burner which made all the chip lights illuminate. Happened a couple time before he noticed what waws happening. Maybe its something that the pilot is doing unknowingly.
ThemickUser is Offline
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JH Newbie
Posts:2

06/11/2008 10:13 PM  
Thanks guys. The IIDS is probably our next step. The Bell tech rep in our area is still telling us that it is a bad ground somewhere. If only it was that simple. Thanks again, Mick
MechstarUser is Offline
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JH Newbie
Posts:3

04/24/2009 1:25 PM  
here's a crazy thought, Could it be moisture? You said it keeps happening at 3am. Is the aircraft on the ramp outside all night? Just throwing an idea at you. good luck
Guns1USMCUser is Offline
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JH Newbie
Posts:1

03/11/2010 10:30 AM  
Worked on Bell 430 for many years. I am taking it the Phantom chip lite means your finding nothing on the chip detectors? Or just not metal slivers? The "paste" like substance that you will find on the transmission chip detectors is from the lube used to install the mast bearing on the mast. This paste while not metallic will cause the chip detector to illuminate the light. I do not believe the IIDS to be the problem as it sounds like a wiring issue if the Tail Rotor gearbox is also a culprit. Sounds like a wiring issue there. If you are finding metal slivers on the Mast bearing chip detector, when was the last 3000 hr inspection done or 5000 hr OH on the transmission. Along with that when was the mast bearing changed last? If any of these are recent, then is sounds like the mast bearing was not seated correctly and your xsmn is eating the spring seal around the mast bearing.
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