PPRuNe Forums - View Single Post - EC225 crash near Bergen, Norway April 2016
Old 25th Jun 2016, 14:10
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AW009
 
Join Date: May 2016
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Lightbulb Times are gone


Looking back at 1993 as @riff_raff did, the Super Puma family has a lot of ‘constructive gray areas’ that never have been really ‘rayed’ with reference to the current certification criteria and to a present state of technique and science.
To summarize:


• E.g.: Rotor suspension by 3 suspension bars instead of 4 or 5 (redundancy & harmonics) and also ‘zero# redundancy by the discontinuous rotor mast and by an extensive ‘de-axation / outlining’ between bevel gear and upper ‘rotor shaft bearing’ in the conical housing?

• Suspicious fixing and securing of the suspension bars with bolts, Nappy Pins (Fokkernadeln) and Washer (not chamfered)?

• The ring gears of the planetary gear modules are simultaneously with the outer housing structure of the MRGB (compare PGB of TP400D6)?

•The inner parts of satellite mesh gear wheels are direct possession of outer bearing races of the roller bearings?

No continuous rotor mast with axial and radial bearings at highest and lowest end and not non-positive to the bottom of MRGB, thus the forces and moments can not transferred direct via the bedplate of MRGB into the transmission and engine deck of the cell. Compare S61 SEA KING (https://www.youtube.com/watch?v=F9wnzBaE24s) and S60B SEAHAWK = S92 SUPER HAWK (http://aasf1-ny.org/4-Standards/Docu...r%20System.pdf, there D6 & D7))?!

•The bevel gear butt with welded shaft, might be of similar resistance to torsion-, shearing- and tensile forces as tp)?

• Etc., etc., ….

Times are gone for (Super) Puma!

Therefore AIRBUS should better clean his mess, instead of a permanently creating knocking sayings and new excuses. This is pure reality – absolutely no bashing - and seems identical also to other AC types of AIRBUS (e.g. NH90 and AS400M having a state of technology and a certification base of the 90th).

In military aviations AS/EADS/ABH always had been a ‘purveyor to H.M.’, but in professional commercial aviations being a market leader, finds its end in reliabilty, in operational and technical flight safety and not only in terms of economic and defense politicaly utilitarian national and subjective yardsticks.

That is a fact the French quys in their ’laissez faire’ never have understood and now they have to pay the bill in an international ’hardball scenario’ of lessee and lessors. The next fate of ABH will be to become a central ‘Second Hand Shop’ for PUMA and this might become a very large one, if ABH wouldn’t change its philosophy fundamentally.

Last edited by AW009; 26th Jun 2016 at 08:05. Reason: Format
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