1997-10-31: The pilot of C-FIWA
was on a VFR flight to Regina from Strasbourg and landed on Runway 13. The a/c landed hard and the left main wheel came off the gear assembly. The a/c bounced and came down resting on the nose and right main gear. There were no injuries to the pilot, but substantial damage to the a/c. ERS responded to the a/c and provided assistance to the pilot. The runway was closed and traffic was diverted to Runway 08. Tower reported significant impact for commercial traffic. TSB authorized the removal of the a/c from Runway 13. UPDATE The pilot reported later that the landing was not hard, but normal, and just after touchdown, the left wheel separated from the gear assembly. Maintenance examination revealed that four bolts had sheared off the gear assembly which caused the wheel to come off. The a/c is presently being repaired at an AMO, which will forward a report to the TSB about whether the bolts failed due to fatigue or stress overload. UPDATE Maintenance at Southern Aviation, where the a/c is being repaired, report that the bolts that broke are aircraft grade AN bolts. The parts manual for this a/c states that either AN or NAS bolts may be used on the a/c, however NAS bolts are described as heavy duty. The manuals do not say which bolt should be used with a particular application (i.e. wheels or skis), however it may be the case that the heavy duty bolts should be used when the a/c is on skis. The Computerized Airworthiness Information System (CAIS)
shows that this a/c is operated with Federal Model C-3000 skis, but without the appropriate drawings, it is difficult to determine whether the bolts are to be changed when the skis are installed. It is not known at this point if the same AN bolts that broke were used when the a/c was operated on skis. Southern Aviation will be submitting an SDR to transport Canada.