- Posts
- 1,053
- Likes
- 5,764
Twocats
··Married... with childrenPlane producer proves poor paint preparation promotes poor performance..... follow up article ;0)
The Aviators Thread
- Posts
- 4,639
- Likes
- 17,589
- Posts
- 1,441
- Likes
- 2,746
DoctorEvil
·This made me smile ..
.
- Posts
- 1,316
- Likes
- 2,461
64Wing
·Headed (way) out of town tomorrow for this...
- Posts
- 27,515
- Likes
- 70,034
- Posts
- 1,053
- Likes
- 5,764
Twocats
··Married... with childrenHeaded (way) out of town tomorrow for this...
The incident occurs, then the blades start eating themselves, debris naturally went rearwards through the compressor causing a stall/surge blowing material forward out the past the IGV's into the cowling is about the best guess I can muster from one photo. Whatever happened it all looks concentrated around the 3 o'clock position.
Do you know what caused this ?
- Posts
- 4,639
- Likes
- 17,589
Omegafanman
·It looks like a blade let go. What's curious is it looks like part of a blade is imbedded in the nose cowl at the 3 o'clock position which means something funky happened.
The incident occurs, then the blades start eating themselves, debris naturally went rearwards through the compressor causing a stall/surge blowing material forward out the past the IGV's into the cowling is about the best guess I can muster from one photo. Whatever happened it all looks concentrated around the 3 o'clock position.
Do you know what caused this ?
My first thought was a structural failure rather than an ingestion - or certainly not a dramatic ingestion. Whatever hit the first row appeared to already have some strong centrifugal force and shared the love hence an outer blade failure plus the debris looks to have stayed air intake side. Could it even be internal? Interested to hear the outcome. Is there some damage or debris release from the nacelle inlet as well?
- Posts
- 1,316
- Likes
- 2,461
64Wing
·No further information just yet, awaiting the work authorization. My initial thought was they FOD'd the thing with ice but it could just be a classic blade separation. I'll keep you guys posted when we get to the aircraft. Probably flying out tomorrow night or Sunday morning
- Posts
- 1,441
- Likes
- 2,746
DoctorEvil
·@64Wing
Thanks for posting and looking forward to hearing your assessment. Correct me if I'm wrong but the hole in the intake at 3 o'clock looks almost as if something has punched it's way from outside in rather than from inside out. The hole looks to me like a flower or mini bomb burst, which is what I'd expect if it was an object entering the intake from outside in. Otherwise, maybe the separated fan blade is embedded in the intake, scrunched up looking like a flower?
Thanks for posting and looking forward to hearing your assessment. Correct me if I'm wrong but the hole in the intake at 3 o'clock looks almost as if something has punched it's way from outside in rather than from inside out. The hole looks to me like a flower or mini bomb burst, which is what I'd expect if it was an object entering the intake from outside in. Otherwise, maybe the separated fan blade is embedded in the intake, scrunched up looking like a flower?
- Posts
- 1,813
- Likes
- 9,384
- Posts
- 1,053
- Likes
- 5,764
Twocats
··Married... with childrenMy first thought was a structural failure rather than an ingestion - or certainly not a dramatic ingestion. Whatever hit the first row appeared to already have some strong centrifugal force and shared the love hence an outer blade failure plus the debris looks to have stayed air intake side. Could it even be internal? Interested to hear the outcome. Is there some damage or debris release from the nacelle inlet as well?
My gut is telling me its blade separation caused by metal fatigue or perhaps FOD with fatigue being the number 1 culprit in my opinion. This will bug the hell out of me now until I know the outcome so please keep us up to speed.
- Posts
- 1,053
- Likes
- 5,764
- Posts
- 1,053
- Likes
- 5,764
- Posts
- 1,813
- Likes
- 9,384
Longbow
·I think you are right, I just googled a photo and the IGVs that I assumed were variable are actually fixed and badly damaged 🙁
Edited:
- Posts
- 1,441
- Likes
- 2,746
DoctorEvil
·Headed (way) out of town tomorrow for this...
Image courtesy of Avgeekery.com via Facebook.
- Posts
- 1,316
- Likes
- 2,461
64Wing
·Somewhere along the line, a "bang" occurred where there should have been a "suck"...
Image courtesy of Avgeekery.com via Facebook.
- Posts
- 1,316
- Likes
- 2,461
64Wing
·So, the thing suffered a compressor blade separation. Just did a lot more damage than usual. The boys are removing the engine as we speak. New one should be on for trim runs tomorrow.
Our newly acquired 421B flew great with a few minor issues. Looking forward to more trips in it. But when spring rolls around and we're super busy again I'll be stuck in the 310 every day. Not really a complaint; she's a doll
Our newly acquired 421B flew great with a few minor issues. Looking forward to more trips in it. But when spring rolls around and we're super busy again I'll be stuck in the 310 every day. Not really a complaint; she's a doll
- Posts
- 1,053
- Likes
- 5,764
Twocats
··Married... with childrenSo, the thing suffered a compressor blade separation. Just did a lot more damage than usual. The boys are removing the engine as we speak. New one should be on for trim runs tomorrow.
Our newly acquired 421B flew great with a few minor issues. Looking forward to more trips in it. But when spring rolls around and we're super busy again I'll be stuck in the 310 every day. Not really a complaint; she's a doll
I am sorry your engine ate itself but at least there was no other fall out associated with it. I wonder if this is a common problem and if there are AD notes against the engine or repeat BSI/NDT tasks to be performed at reduced intervals.
- Posts
- 1,441
- Likes
- 2,746
DoctorEvil
·So, the thing suffered a compressor blade separation. Just did a lot more damage than usual. The boys are removing the engine as we speak. New one should be on for trim runs tomorrow.
Our newly acquired 421B flew great with a few minor issues. Looking forward to more trips in it. But when spring rolls around and we're super busy again I'll be stuck in the 310 every day. Not really a complaint; she's a doll
- Posts
- 16,268
- Likes
- 34,315
JimInOz
··Melbourne AustraliaI'm amazed that a compressor blade separation can do so much damage. The engine looks completely trashed. I would have thought that when the blade separates, it would just punch its way out of the engine due to the centrifugal force involved. However, I could be wrong and I'm happy to be educated.
The blades are sustaining immense aerodynamic compression load as well as centrifugal load, so if a blade simply "lets go" due to root fracture it may not depart in an expected text book trajectory.
As a pax, I've experienced one "what was that bang?" on a C130, but the pilot calmly told us we still had three turning so don't worry.
