# NTSB LAX90DUG09: Miles Atwood 1, N225YY, Chino, CA, August 31, 1990

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: August 31, 1990
- Place: Chino, CA
- Coordinates: 33.999641, -117.680122 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.9996&lon=-117.6801&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report November 9, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 26538
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX90DUG09
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/26538/pdf
- Page: https://openairdocs.org/ntsb/LAX90DUG09

## Probable cause

LOSS OF ENGINE POWER DUE TO A FUEL LINE SEPARATION.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - fuel system,line - separation (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - open field

## Analysis

THE PILOT OF AN EXPERIMENTAL AIRCRAFT LOST ENGINE POWER SHORTLY AFTER TAKEOFF AND CRASHED INTO A FIELD. EXAMINATION OF THE ENGINE REVEALED THAT THE FUEL OUTLET LINE FROM THE ENGINE DRIVEN FUEL PUMP WAS BROKEN. THE FUEL PUMP WAS EXAMINED AND THERE WAS NO APPARENT DAMAGE TO THE GEARS OR RELIEF VALVE AND THERE WAS NO DEBRIS IN THE PUMP.

## Aircraft

- Registration: [N225YY](https://openairdocs.org/aircraft/N225YY), registered now, S/N T-6, built 1986 (OpenAirDocs)
- Reported make and model: MILES ATWOOD 1
- Registry model: [Atwood Leon A MODEL 1](https://openairdocs.org/model/atwood-leon-a-model-1) (registry code 05613TN) (OpenAirDocs)
- Registry engine: [Menasco PIRATE C4 D4](https://openairdocs.org/engine/menasco-pirate-c4-d4) (registry code 43504, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: T-6
- Airframe hours: 42
- Engines: MENASCO D-4-87 135 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Chino Air Museum
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, August 30, 1990
- Airport: CNO, Chino

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 5,650 total, 5,400 as pilot in command, 120 in the last 90 days, 35 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point -0 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19900831037749A](https://openairdocs.org/incident/19900831037749A), Aug 31, 1990: Amtr MODEL1, Chino, CA, Substantial damage. Engine quit on takeoff. Impacted hard in a cornfield off airport. No cause for power loss found. No prior checkout.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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