Pilot Debrief

Grumman G164 near Lincoln, CA — 2020-06-04

Final reportWPR20LA175
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Date
2020-06-04
Location
Lincoln, CA, USA
Aircraft
Grumman G164
Registration
N8486K
Category
Airplane
Highest injury
Minor
Fatalities
0
Phase of flight
Takeoff roll

Probable cause

The pilot’s loss of directional control on takeoff for undetermined reasons.

NTSB narrative

The pilot reported that on takeoff roll, he felt the left brake lock up, which pulled the airplane hard to the left off the runway. The airplane came to rest inverted. All four wing panels and the empennage were substantially damaged. A postaccident examination of the brake system revealed no mechanical anomalies that would have precluded normal operation. The reason for the pilot's loss of directional control of the airplane on takeoff roll was not able to be determined during the investigation.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
Pilot could have aborted takeoff when left brake locked up initially.

NTSB coding

Evidence available

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

Docket documents5

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