DEN08CA154

NTSB accident investigation · North American SNJ-5 · Leadville, CO · September 5, 2008

Accident · No injuriesData collectionFinal report
Date
September 5, 2008, 10:30 local (16:30 UTC)
Place
Leadville, CO
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N9813CNorth American SNJ-5
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report January 22, 2009
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
FAA report
20080905848159A
Case key
68918

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.

Findings · 1

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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedNorth American SNJ-5: 4 casesAll aircraft: 3,958 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

According to the pilot, the preflight inspection was performed and an engine run-up was "completely successful" on the supercharged engine. He advanced the throttle to "full power," noted 2,050 rpm and 20 inches (expecting 2,200 rpm and 32 inches) and released the brakes for the ground roll. After an 800-foot ground roll, the pilot noted 55 miles per hour, 2,100 rpm, and 28 inches. The airplane drifted to the right and the pilot attempted to correct with the application of left rudder and aileron control. The airplane became airborne and the left wing contacted the ground. The airplane settled back to the ground and headed towards the left side of the runway, at which time the pilot elected to abort the takeoff. The airplane became airborne one additional time, departed the runway environment to the left, and impacted several trees, resulting in substantial damage. Density altitude at the time of the accident was estimated to be 11,570 feet. An examination of the airplane systems revealed no anomalies.

Factual narrative

According to the accident report form submitted by the pilot, the preflight inspection was performed and an engine run-up was "completely successful" on the supercharged engine. He advanced the throttle to "full power," noted 2,050 rpm and 20 inches (expecting 2,200 rpm and 32 inches) and released the brakes for the ground roll. After an 800 foot ground roll, the pilot noted 55 miles per hour, 2,100 rpm, and 28 inches. The airplane drifted to the right and the pilot attempted to correct with the application of left rudder and aileron control. The airplane became airborne and the left wing contacted the ground. The airplane settled back to the ground and headed towards the left side of the runway, at which time the pilot elected to abort the takeoff. The airplane became airborne one additional time, departed the runway environment to the left, and impacted several trees. Both leading edges were crushed aft, crushing multiple ribs, and wrinkling the leading edge skin. Several stringers and both sides of the horizontal stabilizer sustained impact damage. Density altitude at the time of the accident was estimated to be 11,570 feet. An examination of the airplane systems revealed no anomalies. According to the owner of the airplane, 2,100 rpm and 27 inches was not abnormal for that make and model of airplane at that altitude.

Aircraft

Registration
N9813C
Reported as
North American SNJ-5
Category
Airplane
Serial number
84995
Airframe hours
4,367
Engine
Pratt & Whitney R-1340-AN-1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 1, 2007
Departed
LXV · Leadville, CO
Destination
LXV · Leadville, CO
Airport
LXV · Lake County Airport, runway 34, 6,400 × 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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
35
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
March 1, 2007
Seat
Front
Flight hours
2,664 total · 6 in this make and model · 1,016 as pilot in command · 169 in the last 90 days · 94 in the last 30 days · 6 in the last 24 hours
Role
Other flight crew
Age
40
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
October 1, 1997
Seat
Rear
Flight hours
193 total · 15 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 7 knots
Visibility
10 statute miles
Lowest ceiling
7,000 ft broken
Temperature
54 °F, dew point 19 °F
Altimeter
30.28 inHg
Observed at
LXV, 1 nm away

FAA reports on this event · 1

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

Other investigations on N9813C · 2

Matched to the same aircraft by N-number and date.