Pool MURPHY MOOSE N223DH

Summary

On 12 May 2012 at about 18:15 local time, a Pool MURPHY MOOSE registered N223DH was involved in an accident near Steamboat Springs, Colorado, United States. 3 people were on board and 3 had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

12 May 2012 at 18:15

Classification

Accident

Location

Steamboat Springs, Colorado, United States

Nearest airport

Steamboat Springs Airport (KSBS)

Coordinates

40.5161, -106.8661

Aircraft

Pool MURPHY MOOSE

Registration

N223DH

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Eagle → Steamboat Springs

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CEN12LA298

3 people had minor injuries.

A locked left brake for reasons that could not be determined because independent observations of the postaccident condition of the airplane could not be performed, and the pilot’s subsequent loss of control.

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

Read the full NTSB narrative

The pilot reported that during the landing roll in the experimental kit-built airplane, the left wheel brake locked, and the airplane departed the left side of the runway. The left landing gear dug into the soft dirt and the airplane nosed over. The pilot/owner/builder disassembled both brake master cylinders and the parking brake valve without federal oversight and found no foreign material or operating problems with the master cylinder or parking valve. The variance of 0.009 inches in the dowel pin length documented by the pilot/owner/builder was explained by standard manufacturing procedures used to achieve near simultaneous operation of the valve between the left and right sides of the parking brake. Functional testing of the parking brake valve revealed no anomalies. Due to the disassembly of the parking brake valve and parking brake assembly without federal oversight, investigators were unable to determine their condition on the airplane at the time of the accident. Accordingly, the cause of the locked left brake could not be determined.

Quoted verbatim from the NTSB record.