Cougar rapporten

Rapporten kom nettopp og er på 166 sider. Ytterligere kommentarer kommer etterhvert. Essensen er som følger:
On 12 March 2009 a Cougar Helicopters’ Sikorsky S-92A on a flight to the Hibernia oil production platform had a total loss of oil in the transmission’s main gear box. The flight crew descended to 800 feet and headed towards St. John’s. Approximately 35 nautical miles from St. John's, during an attempted ditching, the helicopter struck the water in a high rate of descent. One passenger survived with serious injuries and the other seventeen occupants of the helicopter died of drowning.

SAFETY ISSUES
 Category A rotorcraft certified under the “extremely remote” criteria may not be capable of continued operation for 30 minutes with only residual main gear box lubrication.

 Given today’s operating environments, it may now be technically feasible and economically justifiable to produce a helicopter that can operate in excess of 30 minutes following a massive loss of main gear box lubricant.

 Helicopter crews and passengers in Canada remain at risk where helicopters are operated over sea states exceeding the capability of their Emergency Flotation Systems.

 Without a supplemental breathing system, occupants have very little time to egress from a submerged or capsized helicopter before breaking their breath-holds in cold water.

TSB RECOMMENDATIONS
 The Federal Aviation Administration, Transport Canada and the European Aviation Safety Agency remove the “extremely remote” provision from the rule requiring 30 minutes of safe operation following the loss of main gearbox lubricant for all newly constructed Category A transport helicopters and, after a phase-in period, for all existing ones.

 The Federal Aviation Administration assess the adequacy of the 30 minute main gearbox run dry requirement for Category A transport helicopters.

 Transport Canada prohibit commercial operation of Category A transport helicopters over water when the sea state will not permit safe ditching and successful evacuation.

 Transport Canada require that supplemental underwater breathing apparatus be mandatory for all occupants of helicopters involved in overwater flights who are required to wear a Passenger Transportation Suit System.