WPR14CA383

NTSB accident investigation · American Champion 7GCBC · Rimrock, WA · September 20, 2014

Accident · No injuriesData collectionFinal report
Date
September 20, 2014, 15:30 local (22:30 UTC)
Place
Rimrock, WA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N817DHAmerican Champion 7GCBC
Defining event
Takeoff: Abnormal runway contact
Weather
Visual (VMC) · Day
Status
Completed · report November 13, 2014
Report
Approved by Office Director
NTSB office
Western Pacific Region
FAA report
20140920016329A
Case key
90123

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

The pilot's failure to maintain aircraft control during takeoff from a rough runway surface which resulted in an off-airport forced landing just beyond the runway.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Runway/land/takeoff/taxi surfaceEnvironmental issues › Physical environment · Effect on operationAmerican Champion 7GCBC: 1 caseAll aircraft: 253 cases
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomeAmerican Champion 7GCBC: 1 caseAll aircraft: 933 cases
Performance/control parameters: pitch controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedAmerican Champion 7GCBC: 1 caseAll aircraft: 526 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot and pilot-rated passenger of the tailwheel equipped airplane planned to stop at three back country strips before returning to their base airport. The pilot opted not to land at either of the first two planned stops, because she was uncomfortable with the winds at the time of her arrival at each. The third intended destination airport was situated at the shore of a lake. The turf runway was oriented approximately perpendicular to the shoreline, terminated at the shoreline, and was sloped uphill away from the lake. Tall trees and rapidly rising terrain at the other end of the runway resulted in the runway being effectively one way in and one way out, over the lake. The winds were light and variable, and the pilot landed uneventfully at that airstrip. She taxied to the far end, turned around, and began the takeoff roll downhill, towards the lake. She brought the tail up, continued the takeoff roll, and the airplane became prematurely airborne after "rolling over one of the bumpy spots" on the runway. The pilot reported that she tried to fly in ground effect to build airspeed, but lowered the nose too far. The propeller struck the runway, which degraded the airplane performance, and prevented the airplane from successfully climbing. The pilot determined that at that point, she was too far down the runway to safely abort the takeoff on the remaining runway, so she sought a spot straight ahead on the exposed lakebed on which to land the airplane. The pilot steered the airplane towards what appeared to be a dry area that was clear of debris. The airplane struck the dry upslope on the main wheels, and the left main gear impacted a tree stump. The airplane then nosed over to the inverted position. The airplane sustained substantial damage to the wings and fuselage. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

The pilot and pilot-rated passenger of the tailwheel equipped airplane planned to stop at three back country strips before returning to their base airport. The pilot opted not to land at either of the first two planned stops, because she was uncomfortable with the winds at the time of her arrival at each. The third intended destination airport was situated at the shore of a lake. The turf runway was oriented approximately perpendicular to the shoreline, terminated at the shoreline, and was sloped uphill away from the lake. Tall trees and rapidly rising terrain at the other end of the runway resulted in the runway being effectively one way in and one way out, over the lake. The winds were light and variable, and the pilot landed uneventfully at that airstrip. She taxied to the far end, turned around, and began the takeoff roll downhill, towards the lake. She brought the tail up, continued the takeoff roll, and the airplane became prematurely airborne after "rolling over one of the bumpy spots" on the runway. The pilot reported that she tried to fly in ground effect to build airspeed, but lowered the nose too far. The propeller struck the runway, which degraded the airplane performance, and prevented the airplane from successfully climbing. The pilot determined that at that point, she was too far down the runway to safely abort the takeoff on the remaining runway, so she sought a spot straight ahead on the exposed lakebed on which to land the airplane. The pilot steered the airplane towards what appeared to be a dry area that was clear of debris. The airplane struck the dry upslope on the main wheels, and the left main gear impacted a tree stump. The airplane then nosed over to the inverted position. The airplane sustained substantial damage to the wings and fuselage. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N817DH
Reported as
American Champion 7GCBC (NO SERIES)
Category
Airplane
Serial number
1341-2003
Built
2003
Airframe hours
365
Engine
Lycoming O-360, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Rainier Flight Services
Registered owner
Aileron Aviation
Airworthiness certificate
Standard, Aerobatic; Standard, Normal
Last inspection
Annual · May 9, 2014 · 75 hours before
Departed
4S6 · Rimrock, WA
Destination
KRNT · Renton, WA
Airport
4S6 · Tieton State, runway 20, 2,509 × 100 ft, grass/turf

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
39
Injuries
None
Certificate
Airline transport
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
August 14, 2014
Seat
Front
Restraint
4-point
Flight hours
3,598 total · 55 in this make and model · 3,522 as pilot in command · 204 in the last 90 days · 58 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 50 °F
Altimeter
30.04 inHg
Observed at
KYKM, 24 nm away

Docket · 10

The files NTSB released with the investigation on November 3, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.7 MB 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.