A321 NEO PW1100 case crack on DEP from Brussels.
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A321 NEO PW1100 case crack on DEP from Brussels.
Turkish Airlines A321 NEO PW1100 gearbox case crack and oil leakage on DEP from Brussels. Ac returned to Brussels for engine change.
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Another PW1100 problem. In my experience cracked gearboxes like this are very rare especially so early on.
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Gearbox case is the operative term here. jeez
All the same, a very unusual looking crack in a new engine accessory gearbox case.
Doesnt look like a crack, but more like tear failure?
All the same, a very unusual looking crack in a new engine accessory gearbox case.
Doesnt look like a crack, but more like tear failure?
Last edited by underfire; 28th Nov 2018 at 19:11.
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Great! Another round of inspections.
That's a hell of a failure. Wonder how long it takes to produce a full suite of new gearbox casings for all the PW1000s out there?
That's a hell of a failure. Wonder how long it takes to produce a full suite of new gearbox casings for all the PW1000s out there?
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The casting in that region looks very strange - the surface faceted as though the metal was applied with a trowel.
Gearbox/Accessory Gearbox is the same thing. The engine gearbox is there to provide drive for the accessories - oil pump, fuel systems, electrical systems etc.
I'm not very familiar with the PW1100 architecture but I'd assumed they they had two gearboxes - the accessory gearbox, driven off the high spool, and a fan gearbox driven from the low spool?
I don't disagree that it appears to be the Accessory Gearbox, but on the PW1100 don't they have a separate 'gearbox' for the geared fan?
I'm not very familiar with the PW1100 architecture but I'd assumed they they had two gearboxes - the accessory gearbox, driven off the high spool, and a fan gearbox driven from the low spool?
I'm not very familiar with the PW1100 architecture but I'd assumed they they had two gearboxes - the accessory gearbox, driven off the high spool, and a fan gearbox driven from the low spool?
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It looks like the lighting and a degree of tonal separation (posterization) in the heavily compressed image are exaggerating the appearance of surface unevenness.
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The gearbox is an aluminum sand casting, not an investment casting where surfaces as cast are much smoother. Almost all accessory gear boxes are sand cast either made out of aluminum or magnesium and are not polished to make them look good. Nothing new about the way the surface looks except for the crack.
Last edited by Turbine D; 29th Nov 2018 at 14:01. Reason: added a word
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As Dave noted, the planetary gear assembly is directly on the shaft...the fan is connected to the outer ring, and the shaft through the center...I believe the planetary gear assembly is made by Kawasaki...
C'mon guys, it's a straightforward Epicyclic sun & planet gear train, been used for all sorts of uses for about 100 years or more. For Pratt & Whitney, the good old PT6 turboprop, like most turboprops, had its reduction gearing using the same concept, though that had three intermediate carrier gears instead of five.
Also, where is the subject gearbox in this thread title?
Can someone tell me which way the Fan turns, the LPC turns, the HPC turns, the HPT turns and the LPT turns ? I'm getting mixed up with two rotor system and a fan as a separate rotor?
Can someone tell me which way the Fan turns, the LPC turns, the HPC turns, the HPT turns and the LPT turns ? I'm getting mixed up with two rotor system and a fan as a separate rotor?
Would there normally be sufficient stress on the casing to cause such a fracture, unless it had a manufacturing fault?
Surely the casing is a container, rather than a load-bearing component.
Surely the casing is a container, rather than a load-bearing component.