Pilot Debrief

PIPER PA 23-250 near Camarillo, CA — 2014-01-28

Final reportWPR14LA105
Sign in to save
Date
2014-01-28
Location
Camarillo, CA, USA
Airport
CMA
Aircraft
PIPER PA 23-250
Registration
N5977Y
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Landing

Probable cause

The inadequate hydraulic pressure due to a damaged O-ring in the hydraulic powerpack, which prevented the right main landing gear (MLG) downlock from locking in the extended positon and allowed the right MLG to collapse during landing.

NTSB narrative

The pilot reported that he was performing touch-and-go landings and that, during the second landing, the right wing contacted the ground. The airplane then came to a stop on the runway. Postaccident examinations revealed that the right main gear landing (MLG) downlock was not in the locked position and that the right MLG had collapsed during landing. During the teardown of the hydraulic powerpack, a damaged O-ring was found on the gear selector shaft. The damaged O-ring did not allow the hydraulic fluid to build pressure and the downlock to hold, which prevented the downlock from locking the right MLG in the extended position.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
Pilot could have checked landing gear status before landing.

NTSB coding

Evidence available

  • 4 docket documents
View NTSB final reportView NTSB docket

Docket documents4

Related mishaps