Pilot Debrief

CESSNA 550 near Salt Lake City, UT — 2009-03-29

Final reportWPR09LA171
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Date
2009-03-29
Location
Salt Lake City, UT, USA
Airport
KSLC
Aircraft
CESSNA 550
Registration
N44FR
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Landing

Probable cause

The uncommanded retraction of the right main landing gear hydraulic actuator strut for undetermined reasons.

NTSB narrative

The pilot was executing a full-stop landing, prior to which he had confirmed the illumination of the three green "gear-down" lights. Although the touchdown was uneventful, during the landing roll the right main landing gear actuator shaft retracted into its housing, resulting in the retraction of the right main landing gear into its wheel well. The airplane then departed the runway and impacted the adjacent runway lights. A series of postaccident inspections and tests were unable to determine what anomaly or malfunction initiated the retraction of the actuator shaft.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
Proper maintenance of landing gear actuator could have prevented retraction.

NTSB coding

Evidence available

  • 3 docket documents
View NTSB final reportView NTSB docket

Docket documents3

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