Agusta AW139
Joined: Jun 2018
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From: Cali
Thanks, very clear now. I was checking with a couple of friends who fly in different big companies and although they know this procedure is in the RFM, their company's checklist don't consider it. Not sure why not.
Joined: Sep 2004
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From: daworld
Joined: Jun 2018
Posts: 10
Likes: 0
From: Cali
Just to add: load share is performed by the EECs both at Idle and Flight. Couldn't find what's the maximum split but maintenance told me that one of the EECs failures is due to the load share function lost. If it hapens, before start you will have either maintenace white or EEC1(2) fail. Engines runing possibly EEC fail. Hope that helps.
Joined: Sep 2011
Posts: 522
Likes: 77
From: USA
I concur with this. I watched the TQ match recently and it always seems to stay within 1% through all power settings.
Joined: Apr 2019
Posts: 1
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From: Karachi
Just to add: load share is performed by the EECs both at Idle and Flight. Couldn't find what's the maximum split but maintenance told me that one of the EECs failures is due to the load share function lost. If it hapens, before start you will have either maintenace white or EEC1(2) fail. Engines runing possibly EEC fail. Hope that helps.
Maintenance people reset both EEC and problem was resolved.
Joined: Jul 2022
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From: Pakistan
Joined: Feb 2006
Posts: 3,536
Likes: 295
From: The Alps
NEST receives their
Amongst all the recent orders and deliveries of the successful AW139, in states, National Nuclear Security Administration received theirs at Joint Base Andrews as one of the aircraft will be based there and second one at the Remote Sensing lab at Nellis AFB.
https://www.energy.gov/nnsa/articles...-across-nation
cheers
https://www.energy.gov/nnsa/articles...-across-nation
cheers
Joined: Oct 2006
Aviation Qualifications: A&P
Posts: 1,348
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From: USA
They perform low level radiation sensing duties. Usually there will be a public press release with the rotor ops over urban areas to cut down on the 911 calls of low flying helicopters.
They can be depending on the requirements. Both the rotor and fixed wing aircraft are on-call 24/7/365.
but are these aircraft out everyday?
Joined: Jan 2012
Aviation Qualifications: Spotter
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From: UK
They perform low level radiation sensing duties. Usually there will be a public press release with the rotor ops over urban areas to cut down on the 911 calls of low flying helicopters.
They can be depending on the requirements. Both the rotor and fixed wing aircraft are on-call 24/7/365.
They can be depending on the requirements. Both the rotor and fixed wing aircraft are on-call 24/7/365.
Joined: Dec 2007
Posts: 253
Likes: 8
From: the land of redemption
Hi folks, I can't remember the reason why if you shut the master sw off while engines are still rotating during shut down one may introduce a little fuel into the exhaust system which produces a lot of white smoke.
Any help please?
Any help please?
Joined: Nov 2006
Posts: 1,951
Likes: 90
From: After all, what’s more important than proving to someone on the internet that they’re wrong? - Manson
OTTOMH - The "default" without power is for the engine to run. It requires power to the shutoff valve to stop, so if you remove power it reverts to "run" and fuel will flow.
The FADEC doesn't really do much at all during start, if the engine has fuel and ignition and you spin it with the starter it will start. The EEC only has a watchdog on the ITT and may bump the fuel flow back slightly but that is about all until idle is reached.
Pretty easy fix - leave the master on until N1 = 0%? Fairly good practice to avoid after-fires on any turbine and probably says the same in the RFM?
Turning off the master SW too early can also lead to DCU data write corruption as it uses an N1 speed to trigger the write function and of course needs power to do so.
The FADEC doesn't really do much at all during start, if the engine has fuel and ignition and you spin it with the starter it will start. The EEC only has a watchdog on the ITT and may bump the fuel flow back slightly but that is about all until idle is reached.
Pretty easy fix - leave the master on until N1 = 0%? Fairly good practice to avoid after-fires on any turbine and probably says the same in the RFM?
Turning off the master SW too early can also lead to DCU data write corruption as it uses an N1 speed to trigger the write function and of course needs power to do so.
Last edited by RVDT; 25th July 2024 at 03:56.
Joined: Sep 2014
Posts: 320
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From: On land
The FADEC doesn't really do much at all during start
EEC or FADEC
Joined: Oct 1999
Aviation Qualifications: ATPL
Posts: 7,373
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From: Den Haag
Joined: Oct 1999
Aviation Qualifications: ATPL
Posts: 7,373
Likes: 931
From: Den Haag