CEN12LA298 · Pool MURPHY MOOSE
Pool MURPHY MOOSE · Accident: system/component malfunction/failure (non-power) during landing
From Eagle County Regional Airport (KEGE) to Steamboat Springs Bob Adams Field (KSBS)
Event
- NTSB case
- CEN12LA298
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Pool MURPHY MOOSE
- Aircraft type
- Pool MURPHY MOOSE
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N223DH
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Eagle County Regional Airport (KEGE), Eagle, COTo Steamboat Springs Bob Adams Field (KSBS), Steamboat Springs, CO
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Landing · landing roll
- Defining eventThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- System/component malfunction/failure (non-power)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Not determined › Not determined
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
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.
Probable cause
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.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN12LA298
- Event ID
- 20120514X33019
- Case number
- CEN12LA298
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 6789b65a73c64c6618654eb3addd0c013bca456b73e7fa3d32bfd3ee9c17eac9; retrieved 2026-09-15T18:05:47.386Z.