Cessna 210 N3607Y

Summary

On 14 January 2018 at about 23:45 local time, a Cessna 210 registered N3607Y was involved in an accident near Juneau, Alaska, United States. 2 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

14 January 2018 at 23:45

Classification

Accident

Location

Juneau, Alaska, United States

Nearest airport

Juneau Intl (JNU)

Coordinates

58.3556, -134.5800

Aircraft

Cessna 210

Registration

N3607Y

Category

Airplane

Year built

1962

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Hoonah → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

ANC18LA019

Nobody was injured.

A loss of hydraulic fluid due to a fatigue failure of the right main landing gear hydraulic actuator, which resulted in the pilot's inability to fully extend the landing gear and a main landing gear collapse during the landing roll.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The pilot extended the landing gear as the airplane neared the destination airport. The nose gear fully extended and locked into place, but the left and right main landing gear only partially extended. The pilot attempted to manually extend the main landing gear; however, all hydraulic pressure was lost and the gear did not extend fully. He subsequently landed the airplane, during which the main landing gear collapsed, resulting in substantial damage to the right wing and horizontal stabilizer. Examination of the hydraulic system revealed that the right main landing gear hydraulic actuator was fractured about the barrel section adjacent to the end cap. A fracture at the retainer clip groove exhibited striations consistent with fatigue crack propagation, and other fractures through the barrel exhibited signatures of overstress failure. It is likely that, once the fatigue crack grew to a significant depth, the housing cracked further from overstress and hydraulic fluid leaked out of the system, preventing the landing gear from descending properly. The airplane experienced a landing gear collapse accident three years prior that was caused by the left landing gear actuator failure due to a fatigue crack at the retainer ring recess, similar to this accident. The manufacturer had previously issued instructions for modification of some landing gear hydraulic actuators installed on the accident airplane make and model, and a Federal Aviation Administration airworthiness directive (AD) was subsequently issued to mandate the modifications. The manufacturer had also issued a service letter for enhanced inspection of the landing gear actuators. The maintenance records available were insufficient to determine whether the accident airplane had been maintained in accordance with the AD and manufacturer instructions.

Quoted verbatim from the NTSB record.