Pilot Debrief

CESSNA 210 near Florence, OR — 2013-11-29

Final reportWPR14LA059
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Date
2013-11-29
Location
Florence, OR, USA
Airport
6S2
Aircraft
CESSNA 210
Registration
N6575X
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Landing

Probable cause

The failure of the hydraulic power pack, which prevented the extension of the landing gear and resulted in a partial gear-up landing.

NTSB narrative

The pilot reported that the landing gear actuator had been rebuilt and that all ground tests were uneventful. During the takeoff for the maintenance test flight, the landing gear retracted normally. However, when selected to the extend position for landing, the left and right main landing gear would not extend. The nosewheel landing gear did extend and lock in the down position. The pilot's numerous attempts to raise or lower the main landing gear were unsuccessful. The pilot initiated a partial gear-up landing, and, during the landing, the left horizontal stabilizer struck the runway. Multiple attempts to retract or extend the landing gear during postaccident examinations were unsuccessful. During functional tests of the hydraulic power pack, the power pack extended the landing gear; however, it did not extend or retract the flaps. In addition, the power pack did not retract the landing gear or build up any pressure with the hand pump. Further examination of the hydraulic pack revealed that the No. 1 thermal relief valve lost pressure after it was relieved and that four poppet assemblies did not hold pressure.

Analysis

Primary failure mode
Mechanical failure
First missed decision gate
Pilot could have aborted the landing attempt when gear issues were first noted.

NTSB coding

Evidence available

  • 5 docket documents
View NTSB final reportView NTSB docket

Docket documents5

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