LAX03LA063

NTSB accident investigation · Davis YAK-3 UR-2000 · Parker, AZ · January 10, 2003

Accident · Serious injuriesLimited investigationFinal report
Date
January 9, 2003, 17:15 local (Jan 10, 2003, 00:15 UTC)
Place
Parker, AZ
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N498SDDavis YAK-3 UR-2000
Weather
Visual (VMC) · Day
Status
Completed · report December 28, 2004
Report
Approved by Office Director
Parties
Federal Aviation Administration Scottsdale FSDO
FAA report
20030109000239A
Case key
56310

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

failure of the propeller shaft extension mechanism resulting in a loss of power, and the pilot's failure to attain the proper touchdown point.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Propeller failure/malfunctionTakeoff - initial climb
Propeller system/accessories,prop control unit - failureCause
Aborted landing - initiatedPilot in command
Forced landingEmergency descent/landing
In flight collision with terrain/waterEmergency descent/landing
Terrain condition - ground

Analysis

The airplane collided with terrain during an off airport forced landing after the failure of the propeller pitch change control during initial climb after an aborted landing. The propeller blades remained in the high-pitch, low-rpm setting, and did not provide sufficient power to sustain flight. The pilot landed the airplane about 1.5 miles from the airport in open desert terrain. The pilot felt that the propeller shaft extension mechanism failed prior to his landing approach at the airport, resulting in a loss of propeller control.

Factual narrative

On January 9, 2003, about 1715 mountain standard time, a Davis Yak-3 UR-2000, N498SD, collided with terrain during an off airport forced landing at Parker, Arizona. The pilot/owner was operating the airplane under the provisions of 14 CFR Part 91. The private pilot, the sole occupant, sustained serious injuries; the airplane sustained substantial damage. The personal cross-country flight departed Chino, California, at 1600, en route to Parker. Visual meteorological conditions prevailed, and no flight plan had been filed.

A witness stated that the airplane attempted to land, but appeared to land long. The airplane was near the end of the runway before the pilot aborted the landing. The witness said that the engine did not sound like it was running smoothly. The airframe sustained substantial damage during a collision with terrain about 1.5 miles from the airport.

According to the pilot, after landing long on runway 19, he attempted a go-around. The propeller blades remained in the high-pitch, low-rpm setting, and the engine did not develop sufficient power to sustain flight. He felt that the propeller shaft extension mechanism failed prior to his landing approach, resulting in the loss of propeller control. He felt that this loss of control resulted in the longer than normal landing, and the failure of the engine to deliver sufficient power to maintain flight during the aborted landing.

The Airport/Facility Directory, Southwest U. S., indicated that runway 19 was 4,780 feet long and 75 feet wide. The runway surface was asphalt, and the field elevation was 452 feet.

Aircraft

Registration
N498SD
Reported as
Davis YAK-3 UR-2000
Category
Airplane
Serial number
123012
Engine
Pratt & Whitney R2000-7M2, 1,450 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Samuel C. Davis
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · November 2, 2002 · 3 hours before
Departed
CNO · Chino, CA
Destination
P20 · Parker, AZ
Airport
KP20 · Avi Suquilla, runway 19, 4,800 × 75 ft, asphalt

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
58
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
May 11, 2002
Seat
Front
Flight hours
560 total · 54 in this make and model · 480 as pilot in command · 5 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 54 °F
Altimeter
30.03 inHg
Observed at
EED, 41 nm away

Docket · 2

The files NTSB released with the investigation on November 5, 2004, on NTSB’s docket system: statements, records, photos and specialists’ reports. 455 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.