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convair880mfan
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Joined: Fri Jun 25, 2021 12:33 am

Does a jetliner need to be taken out of service after one of its engines suffers a compressor stall?

Sun Oct 10, 2021 8:32 pm

I hate to be at the mercy of Wikipedia here. I am guessing that a compressor stall in an engine due to a bird strike would require an inspection after landing. What about other types of compressor stalls? It seems like there are degrees of seriousness involved involving duration, EGT limits and so on. Would a mechanic need to look at any engine that experienced any kind of compressor stall or just certain kinds? Can there be real damage to the engine due to these rare events? Would they shorten the TBO for such engines. Any informed information? Any first hand experiences. Thanks in advance? There are YouTube videos of compressor stalls but they are of short length and one never finds out if the plane had to return to the field or if it went on its merry way.

https://youtu.be/w3bdUeWcaBo Here's a grainy video of a NATO Boeing 707 experiencing a surge [?] during landing
 
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fr8mech
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Joined: Mon Sep 26, 2005 9:00 am

Re: Does a jetliner need to be taken out of service after one of its engines suffers a compressor stall?

Sun Oct 10, 2021 8:56 pm

It all depends on what you mean by OOS.

You could stall a JT8 or JT9 and have the engine back in service before the ink was dry on the pilot’s side of the logbook. A quick look at the parameters reported, a look in the inlet and exhaust, maybe pull a chip detector (if the book called for it) and you’re back in business…absent findings.

But, with a modern FADEC engine, you “shouldn’t” ever stall. In theory, the EEC should keep that from happening. So, if one stalls, you need to find out why it stalled, and perform an inspection for damage resulting from the stall.

We’ll normally do the damage inspection before the “why” troubleshooting, because you may have an engine change on your hands.
 
GalaxyFlyer
Posts: 8593
Joined: Fri Jan 01, 2016 4:44 am

Re: Does a jetliner need to be taken out of service after one of its engines suffers a compressor stall?

Sun Oct 10, 2021 9:02 pm

The old F-100 joke was flame out the back and he was in burner gaining energy; flames out both ends, he was having a compressor stall trying to light the burner, go get him, he’s losing energy fast. A J-57 was an incredibly stout piece of steel.

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