Pilot Debrief

PROBST ZENAIR 601XL near Hempstead, TX — 2016-04-24

Final reportCEN16LA167
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Date
2016-04-24
Location
Hempstead, TX, USA
Aircraft
PROBST ZENAIR 601XL
Registration
C-GXLP
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Climb

Probable cause

A loose output connection from the generator voltage regulator, which resulted in a loss of power to the electronic ignition system, a total loss of engine power, and a subsequent forced landing, during which the airplane impacted a sign pole.

NTSB narrative

The private pilot departed on a cross-country flight in his experimental, amateur-built airplane, which was equipped with an electronic ignition system. The pilot did not detect any electrical system anomalies before departure, but, about 14 minutes into the flight, the avionics switched to internal battery power. The pilot was unable to troubleshoot the electrical system, and about 2 minutes later the engine experienced a total loss of power. During the subsequent forced landing to a road, the airplane's left wing impacted a road sign, resulting in substantial damage. The pilot conducted a postaccident examination of the airplane and found a loose connection at the generator regulator output. This eventually led to the total loss of electrical power and a subsequent loss of engine power.

Analysis

Primary failure mode
Engine power loss
First missed decision gate
Verify alternator/generator charging during runup before takeoff.

NTSB coding

Evidence available

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

Docket documents8

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