Pilot Debrief

TVAP 4 near Franksville, WI — 2023-10-15

Final reportCEN24LA012
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Date
2023-10-15
Location
Franksville, WI, USA
Airport
62C
Aircraft
TVAP 4
Registration
N42VZ
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Initial climb

Probable cause

The improper installation of the supplemental ignition system, which resulted in a total loss of engine power.

NTSB narrative

The pilot of the experimental, amateur-built airplane stated that the airplane sustained a total loss of engine power during the departure climb. The pilot then performed a forced landing on a field near the departure end of the runway. During the landing, the airplane’s landing gear dug into soft terrain resulting in a nose over of the airplane. The airplane sustained substantial damage to both wings. Postaccident examination revealed the airplane was equipped with a supplemental ignition system. Two units of the supplemental system were installed with fuses that were not called for in the system installation instructions. One of the fuses was blown, which disabled one of the two units and did not allow for the airplane’s magneto system to continue providing engine ignition, resulting in a total loss of engine power.

Analysis

Primary failure mode
Engine power loss
First missed decision gate
Pilot did not toggle off the G3i system to revert to magneto mode during engine power loss.

NTSB coding

Evidence available

  • Photos
  • 8 docket documents
View NTSB final reportView NTSB docket

Docket documents8

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