What happened
The pilot and a passenger rated to fly received radar vectors for multiple instrument landing system (ILS) approaches while conditions were worsening. On the first attempt, the aircraft passed over witnesses but was off course and not in a position to land. The second attempt was aborted before reaching the airport. During the third attempt, radar service was terminated and the pilot was given a frequency change. The aircraft crashed into water about one mile from the runway.
The investigation
Post-accident examination did not disclose any malfunction with the aircraft systems. Both engines were test-run to full power. The investigation disclosed that neither pilot was FAR Part 135 qualified for this flight. The aircraft was being operated with engines over time between overhaul (TBO), transponder test due, and the 100-hour inspection overdue. The pilots did not report any difficulties with the aircraft prior to impact.
Findings
The aircraft was involved in a controlled flight into terrain event during an instrument approach. Contributing factors included deteriorating weather conditions, regulatory non-compliance regarding pilot qualifications, and overdue maintenance items. The failure to maintain the aircraft in an airworthy condition and the lack of proper certification for the crew likely contributed to the accident.