In January, 2000, a pair of main risers was found in the field where the locking loops were not bartacked and consequently one of the loops pulled out, releasing the riser. Fortunately this did not result in any injury. These risers were relatively new and presumed to have been manufactured within the previous few months. At the time, we believed that this was an isolated occurrence but to preclude a re-occurrance of the problem, RI implemented an additional manufacturing inspection of the riser loop bartacks.
See the service bulletin file for more information.