Zenith CH 750 N752VK

Summary

On 23 September 2018 at about 19:45 local time, a Zenith CH 750 registered N752VK was involved in an accident near DeLeon Springs, Florida, United States. 2 people were on board and 2 had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

23 September 2018 at 19:45

Classification

Accident

Location

DeLeon Springs, Florida, United States

Coordinates

29.1397, -81.3431

Aircraft

Zenith CH 750

Registration

N752VK

Category

Airplane

Year built

2012

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

DeLand → DeLand

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

ERA18TA263

2 people had minor injuries.

The pilot's operation of the airplane with the alternator switch in the off position, which allowed the selected battery to discharge and resulted in an ignition system failure and a total loss of engine power.

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

Read the full NTSB narrative

The private pilot/owner of the experimental, amateur-built airplane reported that, about 15 minutes into the local flight, the engine started "skipping" before completely losing power. He then set up for a forced landing to an open area. During the descent, he maneuvered to clear power lines. The airplane touched down at a steep descent angle, nosed over, and came to rest inverted, which resulted in substantial damage to the airframe. The airplane's engine used an electronic control unit instead of magnetos and required at least one of the airplane's two onboard batteries to provide electrical energy to the ignition system for the engine to operate. Postaccident examination of the airplane revealed that both of its batteries were discharged. After the batteries were charged, the engine was started and ran normally. The alternator also charged the batteries normally. The cockpit instrument panel switch that enabled the alternator to supply energy to the airplane's electrical system, and thus charge the airplane's batteries, was unlabeled. When the switch was placed in the unlabeled on position, the alternator field wire received power and the alternator charged normally. The pilot reported that he may have inadvertently left it in the off position during the flight. With the switch in this position, the engine would have continued to run until the selected battery lost its charge. The pilot also reported that he did not use a checklist when operating the airplane. It is likely that the pilot failed to activate the airplane's alternator, which resulted in a discharge of the selected battery during the 15-minute flight. The subsequent loss of electrical power eventually resulted in the total loss of engine power. Additionally, the airplane was not equipped with an alternator warning light as recommended by the engine manufacturer. Had the airplane been equipped with such a light, the pilot might have realized that he had failed to turn the alternator on and that it was not providing energy to the electrical system to sustain the charge of the selected battery.

Quoted verbatim from the NTSB record.