Cessna 172 N7939B

Summary

On 24 September 2006 at about 17:00 local time, a Cessna 172 registered N7939B was involved in an accident near Palmer, Alaska, United States. 2 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

24 September 2006 at 17:00

Classification

Accident

Location

Palmer, Alaska, United States

Coordinates

61.5217, -148.9250

Aircraft

Cessna 172

Registration

N7939B

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Palmer → Palmer

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

ANC06CA138

Nobody was injured.

The pilot's failure to follow the checklist to ensure the proper positioning of the magneto switch during the takeoff roll, which resulted in a partial loss of engine power, and a subsequent collision with high vegetation during the takeoff run. A factor contributing to the accident was the pilot's improper positioning of the magneto switch on the left magneto position.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The private certificated pilot was departing from a remote area that was about 900 feet long on a Title 14, CFR Part 91, local area personal flight. The pilot reported that he previously had trouble with the airplane's charging system. When he attempted to start the airplane for takeoff, the battery was dead. He placed the magneto switch on the left magneto to facilitate starting, and hand-propped the engine. He then began the takeoff roll, which was longer than he expected. In order to miss trees at the end of the departure area, the pilot applied left rudder to maneuver past the trees, but the right horizontal stabilizer and right elevator collided with high brush. The airplane became airborne, and the pilot continued to his destination, about 8 miles away. Upon landing, the pilot discovered substantial damage to the stabilizer and elevator. The pilot reported that he also discovered that the magneto switch was still on the left magneto position, and that he did not select the "both" magneto position prior to the takeoff, thereby reducing available engine power.

Quoted verbatim from the NTSB record.