Loss of Engine Power After Takeoff Leads to Collision with Trees and Canal (N5851C)

Event Summary

Shortly after takeoff, the pilot was advised by tower personnel that both engines were trailing smoke. A witness described the smoke or vapor as black in color, which is indicative of a rich mixture. The pilot then reported that the right engine lost power, and attempts to correct the issue were unsuccessful. He secured that engine and returned to land. After turning base and lowering 15 degrees of flaps and the landing gear, he reported that the left engine lost power. During the descent, the aircraft collided with trees before coming to rest in a canal short of the runway.

Post-Accident Findings

The aircraft was recovered, and both engines ran and operated normally during post-accident tests. The right engine auxiliary pump operational check was found to be good. The left engine auxiliary pump was inoperative due to impact damage. The pilot stated that the auxiliary pumps were off during takeoff. According to the flight manual, the pumps should be positioned to low for takeoff and vapor clearing, which is evidenced by a 'nervous' fuel flow needle.