- Date
- August 18, 2014, 13:30 local (21:30 UTC)
- Place
- Nikiski, AK
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Takeoff
- Aircraft
- N957TTTerry W. Thayer Zenith Stol CH701
- Defining event
- Takeoff: Fuel starvation
- Weather
- Visual (VMC) · Day
- Status
- Completed · report February 11, 2015
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- Parties
- Federal Aviation Administration, FSDO-03
- FAA report
- 20140818016649A
- Case key
- 89909
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The pilot’s improper positioning of the fuel selector valves, which resulted in a loss of engine power due to fuel starvation. Contributing to the accident was the pilot’s failure to follow preflight checklists.
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.
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 reported that he was departing from a remote, off-airport site in an experimental amateur-built airplane. He stated that just after takeoff, as the airplane reached about 50 feet above ground level, the engine lost all power. The pilot then attempted to land the airplane near the departure end of the site, but, with insufficient airspeed or altitude to transition to a landing attitude, the airplane landed hard and sustained substantial damage to the wings and fuselage. According to the pilot, he had turned the airplane's fuel valves to the "off" position after the previous landing, and he failed to move the fuel valves into the "on" position before departure. He also noted that he did not use the preflight checklist. The pilot stated that there were no preaccident mechanical anomalies with the airplane that would have precluded normal operation.
Factual narrative
On August 18, 2014, about 1330 Alaska daylight time, an experimental amateur built Zenith STOL CH-701 airplane, N957TT, sustained substantial damage during a collision with terrain, following a loss of engine power during takeoff from an off-airport site near Nikiski, Alaska. The airplane was registered to and operated by the pilot as a visual flight rules (VFR) personal flight under the provisions of 14 Code of Federal Regulations Part 91. The pilot, who was the sole occupant, was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the flight destined to Nikishka, Alaska. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on August 21, the pilot stated that before landing at the off-airport site he performed a low pass to observe the condition of the site and noted three areas of standing water and one aircraft parked off the site. He then conducted a touch-and-go landing, touching down with the main gear only to test the landing surface, followed by a full stop landing. During the landing roll, the airplane's main landing gear wheels went through areas of standing water, which splashed over the windscreen and under the pilot's door. Upon exiting the airplane the pilot noticed fluid dripping from underneath the wing. He believed it was fuel, as he had a fuel leak in the same location the month prior, so he closed both fuel valves. The pilot reported that before departing for his return trip, he performed a walk-around inspection of the airplane and the airstrip, and noted no abnormalities. He added that he started the engine and did the before-takeoff procedures by memory, without the use the preflight checklist. The pilot said that during takeoff, as the airplane climbed to about 50 feet above the ground (agl), the engine lost all power. The pilot stated he had insufficient airspeed or altitude to transition to a landing attitude which resulted in a hard landing near the departure end of the site. The airplane sustained substantial damage to the fuselage and both wings detached at the rear attachment point. In the pilot's written statement dated August 22, 2014, which was included in the NTSB Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1) the pilot stated that he had failed to move the fuel valves into the "on" position prior to engine start, which resulted in fuel starvation and a total loss of power after takeoff. The pilot also reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot noted in the recommendation section of the Form 6120.1 that the accident could have been prevented if he used the checklists and avoided distractions while completing the checklists.
Aircraft
- Registration
- N957TT
- Reported as
- Terry W. Thayer Zenith Stol CH701
- Category
- Airplane, amateur-built
- Serial number
- 7-7355
- Built
- 2011
- Airframe hours
- 60.6
- Engine
- Rotax 912 ULS, 100 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Condition · June 2, 2014
- Departed
- AK73 · Nikiski, AK
- Destination
- AK73 · Nikiski, AK
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
- 56
- Injuries
- None
- Certificate
- Private
- Airplane ratings
- Single-engine sea, Single-engine land
- Medical
- Class 2, With waivers/limitations
- Seat
- Left
- Restraint
- 4-point
- Flight hours
- 147.6 total · 69 in this make and model · 76.1 as pilot in command · 14.1 in the last 90 days · 2 in the last 30 days · 0 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 210° at 3 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 57 °F, dew point 52 °F
- Altimeter
- 29.88 inHg
- Observed at
- PAEN, 17 nm away
Docket · 1
The files NTSB released with the investigation on January 8, 2015, on NTSB’s docket system: statements, records, photos and specialists’ reports. 644 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.