Guest BeeBee Posted August 19, 2007 Report Share Posted August 19, 2007 We have had 2 unusual and unlilely exceedances recorded on our 407 in the past couple of months. One was for a very high torgue reading that in fact could not have occured and on a seperate occasion an MGT exceedance recorded during cruise, while well within limits. Has anybody else experienced any phantom or unexplained exceedances recorded on the 407? This could becoming a rather expensive problem. Bell, of course, has no explanation. "...very odd..." was their reply when questioned about it! Quote Link to comment Share on other sites More sharing options...
tweaker Posted August 19, 2007 Report Share Posted August 19, 2007 Is it a new or old machine? Quote Link to comment Share on other sites More sharing options...
Guest BeeBee Posted August 19, 2007 Report Share Posted August 19, 2007 10 years old...but all updates completed Quote Link to comment Share on other sites More sharing options...
MEOB Posted August 19, 2007 Report Share Posted August 19, 2007 Ive see it happen with the NG gauge. Set off an exceedance in cruse a few times in the same flight, changed the gauge and all is well. Quote Link to comment Share on other sites More sharing options...
BAH Posted August 21, 2007 Report Share Posted August 21, 2007 We had a torque exceedence in level cruise and a few others, the torque problem turned out to be the cannon plug at the transducer. Moisture is a big problem we have also encountered. Hope this helps Quote Link to comment Share on other sites More sharing options...
Mac-Ex-wafu Posted August 21, 2007 Report Share Posted August 21, 2007 Where was the cab operating? Was it anywhere near a radar? Tq guages have sometimes been known to have wild readings when being illuminated by certain types of radar systems. Did these instances occur at the same place as each other? Quote Link to comment Share on other sites More sharing options...
fix_heli Posted August 22, 2007 Report Share Posted August 22, 2007 We have had 2 unusual and unlilely exceedances recorded on our 407 in the past couple of months. One was for a very high torgue reading that in fact could not have occured and on a seperate occasion an MGT exceedance recorded during cruise, while well within limits. Has anybody else experienced any phantom or unexplained exceedances recorded on the 407? This could becoming a rather expensive problem. Bell, of course, has no explanation. "...very odd..." was their reply when questioned about it! Just a shot in the dark....but did anyone check the ECU.....it records everything and although its a bit different for readings it can help identify whether or not something actually happened to the machine. Its not the Litton program for the gauges, its actually accessed through Maint Terminal. See Chapter 76 starting at about page 33 in the 407 Maint Manual. Hope it helps.... Quote Link to comment Share on other sites More sharing options...
T55 Posted August 23, 2007 Report Share Posted August 23, 2007 Like fix_heli said: sometimes the gauge will spike for whatever reason (sometimes the shape of the clouds in the sky that day) and record an exceedance on the gauge. checking the ECU will tell you if it was actual or not Quote Link to comment Share on other sites More sharing options...
Guest BeeBee Posted August 27, 2007 Report Share Posted August 27, 2007 Thanks for the input. Quote Link to comment Share on other sites More sharing options...
DGP Posted September 5, 2007 Report Share Posted September 5, 2007 they have new cannon plugs out because of mosture problems...never see 0 on my tq gauge even with the new connector...give them a good lookover before you start...had 30% once before start due to cannon plug....pottsy Quote Link to comment Share on other sites More sharing options...
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