WPR11LA405

NTSB accident investigation · Juneau Stol CH-701 · Snohomish, WA · August 18, 2011

Accident · No injuriesLimited investigationFinal report
Date
August 18, 2011, 15:30 local (22:30 UTC)
Place
Snohomish, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N701BZJuneau Stol CH-701
Defining event
Landing-flare/touchdown: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report October 17, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Adminstration FSDO
FAA report
20110818018049A
Case key
81584

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 improper landing flare, which resulted in a stall and a hard landing.

Findings · 2

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotJuneau Tim STOL CH 701: 1 caseAll aircraft: 9,295 casesProbable cause
Performance/control parameters: landing flareAircraft › Aircraft oper/perf/capability · Incorrect use/operationJuneau Tim STOL CH 701: 1 caseAll aircraft: 1,285 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 sport pilot reported that he was relocating the experimental amateur-built airplane to his short home airstrip, which was bordered by trees, grapevines, and a pond. He performed three precautionary approaches to the runway in order to assess the wind conditions, and on the final approach elected to land. The airplane made contact with the runway short of his intended touchdown point; it landed hard and bounced, collapsing the nose landing gear. He said he flared the airplane early, prior to touchdown, and it subsequently stalled about 5 feet above the ground. The pilot was not injured, and the airplane sustained substantial damage to the firewall and left wing spar during the accident sequence. The accident flight was the first time he had landed at the airstrip.

Factual narrative

On August 18, 2011, about 1530 Pacific daylight time, a Juneau (Zenith Aircraft Company) STOL CH-701, N701BZ, landed hard at a private grass airstrip near Snohomish, Washington. The owner/builder was operating the experimental amateur-built airplane under the provisions of Title 14 Code of Federal Regulations Part 91. The sport pilot was not injured; the airplane sustained substantial damage to the firewall and left wing spar during the accident sequence. The flight departed Arlington Municipal Airport, Arlington, Washington, about 1500. Visual meteorological conditions prevailed, and no flight plan had been filed. The pilot reported that he was relocating the airplane to his home airstrip, and that trees, grapevines, and a pond bordered the intended landing area. He performed three precautionary approaches to the east runway in order to assess the wind conditions, and on the final approach elected to land. The airplane made contact with the ground about 60 feet short of his intended touchdown point; it landed hard and bounced, collapsing the nose landing gear. He reported that he flared the airplane early prior to touchdown, and it subsequently stalled about 5 feet above the ground. The pilot stated that this was the first time he had landed at the airstrip, which was about 500 feet long. According to Zenith Aircraft Company, the airplane has a ground roll landing distance of between 80 and 140 feet. The airplane's total time since manufacture was 35 flight hours, and as such, it had not yet completed its 40 hours of Phase One experimental operating limitations. The pilot reported a total flight experience of 126 hours, 35 of which were in the accident airplane. The pilot reported no preimpact mechanical malfunctions or failures with the airframe or engine that would have precluded normal operation.

Aircraft

Registration
N701BZ
Reported as
Juneau Stol CH-701
Category
Airplane, amateur-built
Serial number
7-6065
Airframe hours
35
Engine
Rotax 912ULS, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Juneau Tim W
Registered owner
Juneau Tim W
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · May 25, 2010 · 35 hours before
Departed
AWO · Arlington, WA
Destination
PVT · Snohomish, WA
Airport
PVT · Snohomish Private Airstrip, runway 27, 500 × 40 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
66
Injuries
None
Certificate
Sport Pilot
Instrument ratings
Airplane
Medical
Sport pilot
Last flight review
September 17, 2010
Seat
Left
Flight hours
126 total · 35 in this make and model · 73 as pilot in command · 11 in the last 90 days · 4 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 6 knots
Visibility
10 statute miles
Lowest ceiling
11,000 ft broken
Temperature
70 °F, dew point 54 °F
Altimeter
30.15 inHg
Observed at
KAWO, 11 nm away

Docket · 4

The files NTSB released with the investigation on September 13, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 860 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.