https://www.youtube.com/watch?v=Nz0UDhk ... htFollower


Apologies if someone else posted this.

Nice work by ATC and the crew!

Just another boring day at the office for them. Definitely helps to have a spare engine.

I sent them a fresh engine today. Extremely rare event; I saw the Boroscope. It looks like they took something big into the front side of it.

During the early 441 days, an ATD pilot and an Engineering Manager were flying during required Function and Reliability testing. They declared an emergency when one of the engines tripped to manual mode.

The 441 does some weird stuff when the SRL system fails. A couple year ago, I thought I was about to have a double engine failure during the climb in one. For some reason, at the same time both engines started exhibiting different failure modes of the system. It took me a minute to figure out that it was a failure of both of the SRL systems. Fortunately, I previously taught the Metro II without a SRL system (and the III with it), flipped both of the fuel computers off and the airplane ran fine the remainder of the flight in manual mode. We were never able to find an issue with one engine (it never happened again), but the other had a bad monopole sensor. It wasn't a failure like I had ever seen, or taught before.

For a minute, I wasn't sure what was happening.

The above two posts are why I often say the 441 is not a good turboprop for new turbine pilots.

It’s a great airplane, but that damn computer just can do some weird things than can bite inexperienced pilots.

Robert

The 441 does some weird stuff when the SRL system fails. A couple year ago, I thought I was about to have a double engine failure during the climb in one. For some reason, at the same time both engines started exhibiting different failure modes of the system. It took me a minute to figure out that it was a failure of both of the SRL systems. Fortunately, I previously taught the Metro II without a SRL system (and the III with it), flipped both of the fuel computers off and the airplane ran fine the remainder of the flight in manual mode. We were never able to find an issue with one engine (it never happened again), but the other had a bad monopole sensor. It wasn't a failure like I had ever seen, or taught before.

For a minute, I wasn't sure what was happening.

What's a SRL system?

Most TPE 331's use EGT instead of ITT due to maintainability considerations. EGT correlation with more critical upstream temperatures varies with operating conditions, resulting in a redline that varies, which would not be very pilot friendly. The SRL system measures several paramaters and corrects the output to the gauge so the redline stays constant.

I did a lot of test flights on Metroliners after engine changes and we required shutdown to test the NTS system airborne. I had one fail. Yes, it’s quite an adventure. We did multiple flights with that airplane before I ferried it to the engine ship that overhauled the engine. I can’t remember what they found, but the following flight was successful.

Most TPE 331's use EGT instead of ITT due to maintainability considerations. EGT correlation with more critical upstream temperatures varies with operating conditions, resulting in a redline that varies, which would not be very pilot friendly. The SRL system measures several paramaters and corrects the output to the gauge so the redline stays constant.

I did a lot of test flights on Metroliners after engine changes and we required shutdown to test the NTS system airborne. I had one fail. Yes, it’s quite an adventure. We did multiple flights with that airplane before I ferried it to the engine ship that overhauled the engine. I can’t remember what they found, but the following flight was successful.

The other day, in the cold and being light, I had one engine at flight idle and was doing 1600 FPM on the other one on a single engine go around.

Flying a Citation with one out is really no big deal. It is a very safe aircraft.

Mike C.

The other day, in the cold and being light, I had one engine at flight idle and was doing 1600 FPM on the other one on a single engine go around.

Flying a Citation with one out is really no big deal. It is a very safe aircraft.

Mike C.

He's back up and running with an engine I sold him. Statistically rare event.