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Hole On A-300 Engine - How?  
User currently offlineSeptember11 From United States of America, joined May 2004, 3623 posts, RR: 21
Posted (5 years 1 week 5 days 10 hours ago) and read 3092 times:

A hole is seen on the engine in the picture below.


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Photo © Paulo Carvalho



What happened? Did the engine turbine blew up?


Airliners.net of the Future
9 replies: All unread, jump to last
 
User currently offlineFLY2HMO From , joined Dec 1969, posts, RR:
Reply 1, posted (5 years 1 week 5 days 6 hours ago) and read 2975 times:

Hmmm, it does look at about the right spot for the LP turbine disc to be found, though im surprised that, if it really was only one blade, the whole thing didn't have a catastrofic failure due to imbalance.

User currently offlineTb727 From United States of America, joined Jun 2005, 1648 posts, RR: 9
Reply 2, posted (5 years 1 week 5 days 3 hours ago) and read 2868 times:

Probably threw a piston.  Smile


Too lazy to work, too scared to steal!
User currently offlineFr8Mech From United States of America, joined Sep 2005, 5657 posts, RR: 15
Reply 3, posted (5 years 1 week 5 days 2 hours ago) and read 2844 times:

Isn't that where the 'king latch' lives on the cowl?

I'd say there is a 99.99% probabilty that this is NOT a turbine failure. One blade and the whole engine would've come apart.



When seconds count...the police are minutes away.
User currently offlineFlyingColours From United Kingdom, joined Dec 2003, 2315 posts, RR: 10
Reply 4, posted (5 years 1 week 5 days 2 hours ago) and read 2831 times:

According to the AAIB (UK Air Accidents Investigation Branch) it was...

"The origin of the engine failure was established to be separation of an HPT Stage 2 rotor blade, which had broken off just above the blade platform. The fracture had propagated from the edge of a 0.25" deep notch, which had been worn in the blade leading edge. Similar notches were found on all of the Stage 2 blades. Several HPT Stage 2 nozzle segments around the 12 o'clock position were found to have large cracks in the aerofoil to outer platform fillet. The cracking had weakened the cantilevered nozzle segments and allowed them to deform rearwards under aerodynamic loading and contact the leading edges of the Stage 2 blades."

The full report can be found here,
http://www.aaib.gov.uk/publications/...1___airbus_a300b4_605r__g_mons.cfm

Phil
FlyingColours



Lifes a train racing towards you, now you can either run away or grab a chair & a beer and watch it come - Phil
User currently offlineAvt007 From Canada, joined Jul 2000, 2132 posts, RR: 5
Reply 5, posted (5 years 1 week 4 days 23 hours ago) and read 2778 times:

The loss of a blade, either compressor or turbine, will not cause a catastrophic failure. On the RR Speys, we had to check regularly to see if any LP Turbine blades were missing.

User currently offlineTdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 6, posted (5 years 1 week 4 days 23 hours ago) and read 2771 times:



Quoting Fr8Mech (Reply 3):
One blade and the whole engine would've come apart.

I think you're mixing discs and blades. A blade loss isn't all that uncommon and, aside from damaging neighboring blades, the engine generally survives. A turbine disc failure, on the other hand, is very probably going to take out the engine.

Tom.


User currently offlineFr8Mech From United States of America, joined Sep 2005, 5657 posts, RR: 15
Reply 7, posted (5 years 1 week 4 days 4 hours ago) and read 2488 times:



Quoting Tdscanuck (Reply 6):
I think you're mixing discs and blades.

No, not really. Just never seen or heard of a turbine blade, or cluster of blades, being liberated, radially, without trashing the engine. First time for everything.



When seconds count...the police are minutes away.
User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 8, posted (5 years 1 week 3 days 18 hours ago) and read 2399 times:

Interesting.
Any more pics of this particular Incident from another angle.
regds
MEL.



Think of the brighter side!
User currently offlineEx52tech From United States of America, joined Dec 2006, 559 posts, RR: 1
Reply 9, posted (5 years 6 days 22 hours ago) and read 2054 times:



Quoting Fr8Mech (Reply 7):
No, not really. Just never seen or heard of a turbine blade, or cluster of blades, being liberated, radially, without trashing the engine. First time for everything.

Found a blade missing from the 4th stage of the LP on a CF-6-50C2 one night, no one wrote anything up , no vibration, no anything. But an uncontained failure like that usually is noticed in the cockpit, high EGT or vibration ect...If that was an HP blade, I find it hard to believe that they didn't notice, and performance didn't fall off.



"Saddest thing I ever witnessed....an airplane being scrapped"
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