24 March ? 20 May 2015 | Flight Safety Australia
Robinson R44 main rotor blades—main rotor blade debonded. SDR 510020934
While carrying out CASA AD/R44/25 Amdt 1, it was decided to remove both tip caps from the blades. Small blister found on the underside of the band line on one blade. After removal of corrosion it was obvious debonding had occurred. On other blade, fretting line on the trailing edge of the weight cap was found. P/No: C0167. TSN: 104 hours.
Now I am not sure, but I think that the Part Number ending in a "7" indicates that this is the new model blade. I'd welcome confirmation.
The thing that worries me is the TSN (Time Since New). Only 104 hours!!!!!
Now if my interpretation is correct, does this mean that the mandated replacement blades are already showing signs of disbonding at such an incredibly low TSN?
Regards
Blakmax