Pilot Debrief

CESSNA 172RG near Redmond, OR — 2013-01-18

Final reportWPR13LA102
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Date
2013-01-18
Location
Redmond, OR, USA
Airport
RDM
Aircraft
CESSNA 172RG
Registration
N6290V
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Approach

Probable cause

Failure of the left main landing gear pivot assembly during the landing approach.

NTSB narrative

During the landing approach, the flight instructor and pilot undergoing instruction were unable to fully extend or retract the left main landing gear and, after multiple unsuccessful troubleshooting attempts, performed a gear-up landing. Postaccident examination revealed that the pivot assembly for the left main landing gear actuator had fractured and had separation features consistent with torsional fatigue. The Federal Aviation Administration previously issued an airworthiness directive (AD), which included an inspection of pivot assemblies for cracks, in accordance with a manufacturer's service bulletin (SB). The AD called for repetitive inspections of the pivot assembly if the airplane experienced a hard landing, and the SB recommended, in small print, full recompliance after a hard landing. The SB was complied with 12 years and 2,730 flight hours before the accident. The airplane was subsequently involved in a hard landing, and a reinspection was conducted; however, recompliance with the entire SB was not achieved as recommended in the SB, and the pivot failed 894 flight hours after the hard landing.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
CFI could have opted for an earlier diversion or emergency landing.

NTSB coding

Evidence available

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

Docket documents9

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