Schreiner Airways (operating in Nigeria as Aero Contractors Nigeria) around 2000/2001 had about a 1 metre inboard section of a blade break off in flight from an S76B (either 5N-BBK or 5N-SDW). The rear edge of the main spar was visible for nearly 1 metre and some outer skin had been torn off, exposing the filler foam for around another half metre. It landed safely on a drill ship and was flown back to Port Harcourt after a spare (A+) blade had been borrowed from Bristow and shipped out that night. It was due to a manufacturing defect on a particular batch of blades all of which were grounded until the manufacturer sent out specialist repair teams to fit strengthening patches on the inboard sections of the bad batch.