Facts In Motion
Region: US
Thursday 09 July 2026 17:34:38 GMT
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conducteurcitroën :
Standard procedure on the Garrett TPE-331’s to prevent shaft bowing.
2026-07-09 22:45:53
46
Drgas :
Well I have never done this and I have never experienced shaft bowing. Also, I'm not a pilot or in aviation.
2026-07-10 22:05:53
9
willi :
winding up the rubber bands for the next flight.
2026-07-10 00:29:10
1813
Devan :
this feels like something that could be accomplished with a 20$ electric motor
2026-07-10 10:47:13
166
🦆 Master Baiter 🎣 :
seems like something the trainee would be told to do after corporate got tired of him.
2026-07-09 22:20:26
1079
Kelp :
That’s how I test if I left the magnetos on
2026-07-10 04:19:47
76
Jet_aviator7 :
This is not standard procedure. I flew the metro for damn near 12 years and we never did this. And we were in some of the most hostile work environments.
2026-07-10 02:56:59
30
GhostProtocol602 :
Flooded the cylinders. Using pistons to get it out. I’m assuming
2026-07-09 23:30:47
19
Tanuki :
whos doing the other aide?
2026-07-09 20:58:33
37
Luka :
Might seem dumb, but I don’t work in turboprops. What is shaft blowing and how does manual prop rotation during cooldown help reduce that?
2026-07-10 01:40:19
0
donald_gillis :
Worked on a corporate jet ramp for 2 years. Saw this happen maybe 1 time max.
2026-07-09 19:27:35
16
DevZeClown :
Why not hook up an auxiliary electric motor like an engine starter? I don't see why this cannot be automated, especially if it's a significant part of maintenance as this seems to imply
2026-07-10 02:41:07
34
tudog55 :
dafuk? They couldnt put a small motor to do that??
2026-07-10 05:17:51
0
MrStutz333 :
or just engineer a turbo prop that doesn't have this issue...
2026-07-10 19:43:09
1
Ab :
Why isn’t there some hydraulic or electrical component that automatically does this on shutdown
2026-07-09 22:50:28
5
John Douglas :
If only they could design an electric motor to do that.
2026-07-10 02:28:59
13
Daisy Pup! :
20 years and ive never seen this before
2026-07-10 06:33:25
0
NKS12345 :
The San Antonio Sewer Pipe!
2026-07-10 00:13:51
6
Ryan Cumberbatch :
He rescrewing it on so it doesn’t fully unscrew during the next flight kinda like an excavator
2026-08-23 15:44:36
7
tofu todd :
The TPE331 is susceptible to "shaft bow," a condition in which the shaft connecting the compressors and turbines actually bends enough to seize the engine. Even a tiny amount of bow will seize an engine. Pilots of the Conquest II, Merlins/Metroliner, MU2, etc., are trained to spin the engine through to remove residual heat from the engine core. Spinning the prop through a few rotation causes the compressor/turbine sections to spin, expelling the heat. With a gear ratio of approximately 23:1, spinning the propeller all the way through once spins the core 23 times.
2026-07-11 02:29:59
4
user3977729314552 :
Holy crap is that a Metro liner Jesus Christ? Did I go back in time?
2026-07-10 08:54:21
1
Benbalooky :
That sounds super made up. what does the engine manufacturer say?
2026-07-10 04:00:18
1
ibm135 :
Never did this in the Navy
2026-07-09 22:57:28
0
Deedlith :
yeah, this is false. never seen anyone have to do that
2026-09-01 05:29:17
0
YouWinFreeiPod :
it's a geared turboprop thing. it's all connected to a shaft so spinning the main prop introduces cool air into the turbine section and forces out hot air
2026-07-10 23:19:10
1
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