lineworker Posted June 30, 2013 Report Share Posted June 30, 2013 Hello, I have a 206 that has darkened temperature indicator on the transmission side of the driveshaft. The oil is bypassing the seal from engine to transmission. Does this explain the temp indicator? The a/c is grounded to understand the problem of course. Thanks for your help Quote Link to comment Share on other sites More sharing options...
ray Posted June 30, 2013 Report Share Posted June 30, 2013 There are two colours of temp indicators, Yellow and Red. The maintenance manual will indicate what to look for. Table 63-3 of the Maintenance Manual, page 25. (The aircraft isn't necessarily grounded.) Quote Link to comment Share on other sites More sharing options...
lineworker Posted June 30, 2013 Author Report Share Posted June 30, 2013 I should mention that it is the yellow 602 indicator. Which if I read correctly in the manual, is rated for 270, and red is 360.. I think. If the red turns black, you might not come back...? Changing indicators, no grease leaking, no excessive heat after shutdown, alignment ok, no vibration, no discoloring of apoxy, indicator black at transmission coupling only. Quote Link to comment Share on other sites More sharing options...
lineworker Posted June 30, 2013 Author Report Share Posted June 30, 2013 So, should we not change the indicator before next flight to check recurrence? The manual steps go a lot further. These guys have been flying with it black for a month, so to make a point, we are changing it now.. Quote Link to comment Share on other sites More sharing options...
ray Posted June 30, 2013 Report Share Posted June 30, 2013 As per the manual: If one yellow indicator is black, and the other yellow indicator is good, the probable cause is contamination on installation. Keep flying and change the one indicator as soon as practical. If both yellow indicators are black, there is an overtemp condition that must be fixed before further flight. Check alignment, check for correct C of G loading, continued operating at high power settings. I've also come across soft isolation mounts, bad batch of grease, in addition to misalignment issues for driveshaft over heating. Quote Link to comment Share on other sites More sharing options...
lineworker Posted June 30, 2013 Author Report Share Posted June 30, 2013 Thank you, The isolation mount is in good condition, the machine is well balance and without detectable vibration, I witnessed them strobe it 2 months ago and can not feel any change. The bad batch of grease? Quote Link to comment Share on other sites More sharing options...
ray Posted June 30, 2013 Report Share Posted June 30, 2013 http://forums.verticalmag.com/index.php?showtopic=21290 Quote Link to comment Share on other sites More sharing options...
heliheli Posted July 3, 2013 Report Share Posted July 3, 2013 k-flex drive shaft, look into it. 2 Quote Link to comment Share on other sites More sharing options...
lineworker Posted July 3, 2013 Author Report Share Posted July 3, 2013 http://forums.verticalmag.com/index.php?showtopic=21290 Thanks very much, I am not lazy, just never have time to peruse anymore. Best Regards, thanks again, Joel Quote Link to comment Share on other sites More sharing options...
chopterlol Posted July 4, 2013 Report Share Posted July 4, 2013 . Quote Link to comment Share on other sites More sharing options...
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