To get to the harness would take 8 hours maybe. Remove the TR, exhaust, unstretch the tie bolt and remove the module. Have done this, along with complete disassembly's on this TFE's and TPE's many, many times. However, it was in the late 70's early 80's. Working for Airesearch Aviation at Houston Didn't have all the computer controls, just had a box we could adjust the N1. Nice channel.
This feels like a “parts canon” fix. I guess it’s a bit harder on a plane to scope 😂 is harness wire repair not a thing on airplanes? Was there any diagnostic on the harness?
It is actually from the 1990's, and came on a floppy disk. I had to modify my tool box computer to run Windows XP, so my tool box computer can communicate with the engine DEEC computers. The DEEC's that run the engines, in this aircraft, are from the 1990'S.
Awesome! Just curious… how long did that ITT harness take to get to you? I’m going through a triple MPI on a 900LX I maintain and had my fingers crossed wouldn’t need an ITT harness. Honeywell is such a mess these days!
The overhaul / repair company delt with Honeywell directly, and it took about a month to get the replacement ITT, once ordered. The entire process took about 3 months, with me sending the downloaded data to the overhaul / repair facility and the Engine Trend monitoring company approved by Honeywell. I had asked to have that ITT harness replaced during our jets dual MPI's. For some reason they didn't do it. Fortunately, the aircraft owner has both engines, and the APU covered under Honeywell's MSP gold insurance program. MSP Gold covered almost all the cost of the ITT replacement.
Yeah I bet they are so strapped for these harnesses, they do not replace them unless they absolutely need to. I don’t know how operators go about without MSP.
@@shadojet3868 Gadzooks....that's really scary. There should be some sort of 'service needed' or other alert to the crew. Too often we hear about catastrophic failures that happen because warnings were either ignored or not-known. It makes me wonder how long this would have continued undetected, until something more serious developed. Glad someone caught this before something happened. As I understand it, ITT is a critical engine parameter that could indicate all sorts of problems such as a hot-start, combustor problems, fuel-mixture or delivery, possibly impending flameout. I definitely would want to know if anything wasn't 100% in that area.
Nice they have specialist for all those complex parts to install. Even doing a windshield on a jet is a specialist job.
To get to the harness would take 8 hours maybe. Remove the TR, exhaust, unstretch the tie bolt and remove the module. Have done this, along with complete disassembly's on this TFE's and TPE's many, many times. However, it was in the late 70's early 80's. Working for Airesearch Aviation at Houston Didn't have all the computer controls, just had a box we could adjust the N1. Nice channel.
I really enjoy this channel!
Thank you! I appreciate your comment, and you taking the time to watch my videos!
This feels like a “parts canon” fix. I guess it’s a bit harder on a plane to scope 😂 is harness wire repair not a thing on airplanes? Was there any diagnostic on the harness?
that software looks like it is left over from the 1990s
It is actually from the 1990's, and came on a floppy disk. I had to modify my tool box computer to run Windows XP, so my tool box computer can communicate with the engine DEEC computers. The DEEC's that run the engines, in this aircraft, are from the 1990'S.
Great vid. Loving the content :^)
Thank you for taking the time to watch my videos.
@@shadojet3868 I love the nuts and bolts of aircraft maintenance. Totally geeking out, lol
Awesome! Just curious… how long did that ITT harness take to get to you? I’m going through a triple MPI on a 900LX I maintain and had my fingers crossed wouldn’t need an ITT harness. Honeywell is such a mess these days!
The overhaul / repair company delt with Honeywell directly, and it took about a month to get the replacement ITT, once ordered. The entire process took about 3 months, with me sending the downloaded data to the overhaul / repair facility and the Engine Trend monitoring company approved by Honeywell. I had asked to have that ITT harness replaced during our jets dual MPI's. For some reason they didn't do it. Fortunately, the aircraft owner has both engines, and the APU covered under Honeywell's MSP gold insurance program. MSP Gold covered almost all the cost of the ITT replacement.
Yeah I bet they are so strapped for these harnesses, they do not replace them unless they absolutely need to.
I don’t know how operators go about without MSP.
Were any faults revealed to the pilots during the flight, or were they only discovered after the data was downloaded ?
Both pilots said there was no indication of the ITT faults in the cockpit. The ITT issue was discovered after the data download.
@@shadojet3868 Gadzooks....that's really scary. There should be some sort of 'service needed' or other alert to the crew. Too often we hear about catastrophic failures that happen because warnings were either ignored or not-known. It makes me wonder how long this would have continued undetected, until something more serious developed. Glad someone caught this before something happened.
As I understand it, ITT is a critical engine parameter that could indicate all sorts of problems such as a hot-start, combustor problems, fuel-mixture or delivery, possibly impending flameout. I definitely would want to know if anything wasn't 100% in that area.
Can you share time spent and total costs?
To change the ITT harness and associated part took about two full days. Total cost was just over 51K.
@@shadojet3868 Wow,,,,You really need DEEP pockets to own one of these...
Assuming aircraft engine designers are like automotive designers. By that I mean gotta tear more stuff off than necessary to get to stuff.
We often say. The aircraft designers never design things that need to be taken apart and repaired.
Kinda like restart the computer you know it won't fix it but you have to do it
So true.
So no one knows what caused the fault... Just replace a part. It could have just been ONE wire broken. A fix $200. Replace part $15000.....
Once removed, the ITT harness showed signs of breaking apart. So it was definitely the ITT harness it self and not in the aircraft wiring.
Was it under warranty interesting how expensive this stuff gets.