SEA94LA101

NTSB accident investigation · Asher RV-6 · Enterprise, OR · April 15, 1994

Accident · Minor injuriesLimited investigationFinal report
Date
April 15, 1994, 13:50 local (20:50 UTC)
Place
Enterprise, OR
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N7057GAsher RV-6
Weather
Visual (VMC) · Day
Status
Completed · report December 2, 1994
Report
Approved by Office Director
FAA report
19940415007999A
Case key
41910

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

A loss of power due to a partially blocked induction air filter. Factors include no suitable terrain on which to execute a forced landing.

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.

Loss of engine power(partial) - nonmechanicalTakeoff - initial climb
Induction air control,air filter/screen - blocked(partial)Cause
Forced landingDescent - emergency
On ground/water encounter with terrain/waterLanding - flare/touchdown
Terrain condition - none suitableFactor

Analysis

Just after takeoff, the aircraft experienced a partial loss of power, and the pilot elected to attempt a forced landing on the nearby unsuitable terrain. Inspection of the aircraft revealed that the induction air filter was partially blocked by fragments of an insulating material that the builder had wrapped around the exhaust system.

Factual narrative

On April 15, 1994, approximately 1350 Pacific daylight time (PDT), the pilot of an Asher RV-6 experimental aircraft, N7057G, impacted the terrain during an attempted forced landing. The forced landing was initiated by the pilot after he experienced a loss of engine power during the initial takeoff climb from Enterprise Municipal Airport, Enterprise, Oregon. The certified flight instructor was not injured, his passenger received minor injuries, and the aircraft sustained substantial damage. The personal pleasure flight, which was departing for Afton, Wyoming, was operating in visual meteorological conditions at the time of the accident. The pilot had filed a VFR flight plan, and there was no report of an ELT activation.

According to the pilot, the engine experienced a rapid power loss just after takeoff, and he elected to attempt a forced landing on the unsuitable terrain off the end of the runway.

Inspection of the aircraft by an NTSB investigator and an FAA inspector revealed that the induction air filter had been partially blocked by fragments of an insulating material that the builder had wrapped around portions of the exhaust system.

Aircraft

Registration
N7057G
Reported as
Asher RV-6
Category
Airplane, amateur-built
Serial number
200066
Engine
Lycoming O-360-A1A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Asher, Mervyn E.
Airworthiness certificate
Special, Experimental (Special)
Destination
AFO · Afton, WY
Flight plan
VFR
Airport
8S4 · Interprise Municipal

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
62
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
4,500 total · 104 in this make and model · 4,450 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
50 statute miles
Lowest ceiling
None
Temperature
66 °F, dew point 30 °F

FAA reports on this event · 1

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