What happened
On a night flight from Williams Lake to Kamloops, British Columbia, a Navair Charter Piper PA-31 was conducting an instrument flight rules (IFR) approach to the Kamloops airport. During the procedure, the crew identified a break in the cloud layer and established visual contact with ground references. Following this, the captain cancelled the IFR flight plan to attempt a visual flight rules (VFR) approach.
While descending, the aircraft entered a figure-eight pattern perpendicular to the localizer. At approximately 1902 PST, the aircraft struck trees at an elevation of 2,400 feet above sea level, roughly seven nautical miles east-southeast of the airport. The impact and subsequent fire destroyed the aircraft. The captain sustained fatal injuries, while the first officer suffered serious injuries.
The investigation
The investigation focused on the transition from IFR to VFR flight and the environmental conditions during the descent. Investigators examined the weather at the time, noting that while the reported visibility and ceiling met VFR minimums, the combination of darkness and sparsely lit, mountainous terrain significantly reduced visual references.
Evidence showed that the crew was aware of a departing DHC-8 on an opposing track. The investigation looked into whether the need to maintain separation from this departing IFR traffic influenced the crew's descent profile. The aircraft's maintenance records and the operator's safety standards were also reviewed, with audits finding the company's regulatory compliance to be satisfactory.
Findings
- The aircraft collided with trees in mountainous terrain because the crew lacked adequate visual cues to accurately determine their altitude above the ground.
- The captain's decision to cancel the IFR flight plan and attempt a visual approach occurred well outside the established VFR circuit area.
- The inherent risks of conducting night VFR operations in mountainous regions contributed to the accident.
- The crew's need to remain clear of departing IFR traffic at the airport acted as a contributing factor.
- The dark, overcast conditions and the featureless, poorly lit terrain impeded the pilots' ability to maintain safe separation from the ground.