Engine Failure indications DA-40D - CED/AED

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FaNtaSmai
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Engine Failure indications DA-40D - CED/AED

Post by FaNtaSmai »

Hey fellas
I fly DA-40D with TAE-125-02-99 engine and I am currently working on the root cause of an engine failure and I was wondering if anyone had any information regarding the following:

1.Engine indications on CED/AED with the propeller windmilling (load and propeller RPM, etc.)
2.Annunciator Panel indications in case of an engine failure.
3.The fuel pressure inside the common rail of the fuel injection system.
4.Any signs or clues that can help differentiate whether the propeller was stationary, windmilling or operating normally before it hit the ground.

Thanks in advance
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Re: Engine Failure indications DA-40D - CED/AED

Post by Karl »

Do you have the data downloaded from the FADEC? Easy to access the data if you have.
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Re: Engine Failure indications DA-40D - CED/AED

Post by FaNtaSmai »

Karl wrote: Wed Jun 05, 2024 3:56 am Do you have the data downloaded from the FADEC? Easy to access the data if you have.
Yes I have, But I was told they need to be sent to the manufacturer to be decoded. Is there any other option?
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Re: Engine Failure indications DA-40D - CED/AED

Post by Karl »

Send me a PM, I will try to look at the data.
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Re: Engine Failure indications DA-40D - CED/AED

Post by Soareyes »

Or post a link to the data file here for a wider review.
Current: DA42-V1

Previous: Hang gliders, Paraglider, DA40(x3), Cessna 150 Aerobat, SR22
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Re: Engine Failure indications DA-40D - CED/AED

Post by FaNtaSmai »

Soareyes wrote: Thu Jun 06, 2024 10:50 am Or post a link to the data file here for a wider review.
So this is the engine event log related to the day of accident, I could not find the interpretation of Warning Class 87 anywhere in the fault isolation. Any ideas?
https://postimg.cc/bDqwDrB6
Thanks in advance
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Re: Engine Failure indications DA-40D - CED/AED

Post by Karl »

FaNtaSmai wrote: Wed Jun 05, 2024 3:20 pm
Karl wrote: Wed Jun 05, 2024 3:56 am Do you have the data downloaded from the FADEC? Easy to access the data if you have.
Yes I have, But I was told they need to be sent to the manufacturer to be decoded. Is there any other option?
Why didn't you send it to the manufacturer?

Usually, the class warnings don't mean much and are just admin-type information.
The High negative delta/low Prail shows a loss of fuel pressure.

Really need to see the whole data package to see any details but you can just email support and ask them to send you the XL file for the last flight.

Karl.
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Re: Engine Failure indications DA-40D - CED/AED

Post by Karl »

I contacted the OEM to confirm and they stated that the class warnings are translated immediately below. You can ignore the class warnings and read the English translation entry.
So class 87 is High negative PRail delta and class 25 is Low PRail.

The engine lost fuel pressure for some reason.
The fluctuating pressure would seem to indicate low fuel level or air in the system.
Had the aircraft just completed maintenance? Had the fuel system been bled correctly? Was the engine difficult to start?
What is the situation now? have you managed to get it running again?
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Re: Engine Failure indications DA-40D - CED/AED

Post by ememic99 »

I had something similar last month on one engine and pressure regulating valve was changed (ASSY PRESSURE REGULATING VALVE - 05-7320-E000703 TARIC: 84818059).
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Re: Engine Failure indications DA-40D - CED/AED

Post by FaNtaSmai »

Karl wrote: Tue Jun 11, 2024 3:40 am I contacted the OEM to confirm and they stated that the class warnings are translated immediately below. You can ignore the class warnings and read the English translation entry.
So class 87 is High negative PRail delta and class 25 is Low PRail.

The engine lost fuel pressure for some reason.
The fluctuating pressure would seem to indicate low fuel level or air in the system.
Had the aircraft just completed maintenance? Had the fuel system been bled correctly? Was the engine difficult to start?
What is the situation now? have you managed to get it running again?
I was told that the following repair manual is used to decode the engine data and the Class warnings: https://postimg.cc/WhQ9HLDj
In this manual Code 25 which I've been told is the same as Class warning 25 is interpreted as High Coolant Temperature.
But what the OEM has stated makes complete sense. Is there any chance I can have the manual used to decode these warning classes? Or if you have contacted them via Email, a single screenshot of their response will do the job for me.
Regarding your questions, the aircraft has had its maintenance as scheduled and no faults were found prior to the day of the incident. The engine has not been thoroughly analyzed yet, and there have been no efforts to get it running again as we are gathering all the information to send to the manufacturer to isolate the fault. I will keep you posted.

Regards
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