What happened
A non-scheduled cargo flight operated by Speed Air 960, flying a de Havill and DHC-6-300 Twin Otter, was traveling from Goose Bay to Davis Inlet, Newfoundland, when it encountered instrument meteorological conditions. The crew of two attempted a non-precision instrument approach to the airport but executed a missed approach after failing to establish the necessary visual references at the minimum descent altitude.
During a second approach attempt, the crew decided to continue below the minimum descent altitude if visual contact with the surface was made. While descending at a rate of approximately 1500 feet per minute, the aircraft struck the frozen surface of the Labrador Sea approximately two nautical miles north-northeast of the airport. The impact resulted in one fatality and one serious injury. The aircraft was destroyed.
The investigation
The investigation examined the aircraft's weight, loading, and the crew's approach procedures. Investigators found that the aircraft was operating in icing conditions and that the airframe de-icing system was functioning normally. The investigation also reviewed the aircraft's loading, noting that the cargo had not been properly secured and that the total weight of the aircraft likely exceeded its maximum allowable takeoff weight by approximately 115 pounds.
Findings
- The captain descended below the minimum descent altitude without establishing visual contact with the required references.
- The aircraft was overloaded, with a total weight estimated at 13,000 pounds, exceeding the maximum takeoff weight of 12,500 pounds.
- The cargo was not properly secured to the aircraft floor or side walls.
- The crew did not follow standard operating procedures regarding briefings for the approach and missed approach.
- The aircraft encountered airframe icing during both approach attempts.