Incident Overview
A night air taxi cargo flight experienced a problem with the crew intercom system during departure. The crew initiated their descent at a later than normal distance from the airport. As a result, a power reduction below 25 percent torque was required, which activated the gear warning horn. The sound eventually became part of the background noise.
Approach and Communication Issues
During the approach, the captain asked the tower to dim the runway lights. At that moment, the runway and approach lights went out, causing the crew to lose sight of the runway. While the captain was asking the tower to turn the lights back on, the first officer called out, "gear down, syncs off, speeds high, below the line check list." The captain did not hear the first officer's callout. The captain stated that he did not hear the callout either because of the conversation he was having with the tower or because of the intercom system difficulties.
Final Approach and Landing
As the approach continued, the first officer had a problem slowing the airplane to proper approach speed. The airplane touched down on the runway with the landing gear retracted, slid about 2,500 feet, and exited the left side of the runway.
Investigation Findings
The investigation did not state a probable cause for the incident. No further details regarding aircraft type, registration, operator, location, occupants, injuries, or damage were provided in the source.