- Date
- July 20, 2015, 21:15 local (Jul 21, 2015, 05:15 UTC)
- Place
- Dillingham, AK
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N8761CPiper PA 18-150
- Defining event
- Initial climb: Loss of lift
- Weather
- Visual (VMC) · Dusk
- Status
- Completed · report May 16, 2016
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- Parties
- FAA
- FAA report
- 20150720014409A
- Case key
- 91640
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 failure to attain adequate airspeed during initial climb after takeoff, which resulted in an aerodynamic stall. Contributing to the accident was the pilot's improper decision to continue a takeoff even though the airplane was not airborne by the planned takeoff decision point.
Findings · 5
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 private pilot was conducting a personal flight in the float-equipped airplane. The pilot reported that, after reaching the planned takeoff decision point, the airplane was not airborne, so he applied full flaps, and the airplane then immediately became airborne. The airplane climbed to about 40 ft above ground level, but it had insufficient airspeed to continue climbing and subsequently stalled. In an attempt to avoid impacting the trees ahead, the pilot initiated a left bank, and the airplane subsequently impacted a flat area of muskeg adjacent to the waterway. A postaccident engine examination revealed no mechanical anomalies or malfunctions that would have precluded normal operation. The pilot should not have continued the takeoff given that the airplane had not become airborne by the planned decision takeoff point.
Factual narrative
On July 20, 2015 about 2115 Alaska daylight time, a float equipped, Piper PA-18-150 airplane, N8761C, sustained substantial damage shortly after takeoff from Shannons Pond (0Z3), Dillingham, Alaska. The pilot and passenger were uninjured. The airplane was registered to, and operated by, the private pilot under the provisions of Title 14 Code of Federal Regulations (CFR) Part 91 as a personal flight. Visual meteorological conditions prevailed at the time of the accident, and a visual flight rules (VFR) flight plan was filed. In a statement provided to the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), the pilot stated that during takeoff, after reaching the planned takeoff decision point, full flaps were applied. The airplane immediately became airborne and climbed about 40 feet above ground level (agl).Once reaching that altitude, the airplane did not have the necessary airspeed to continue climbing. In an effort to avoid impacting the trees ahead, a left bank was initiated and the airplane impacted a flat area of muskeg adjacent to Shannons Pond. A post-accident engine exam revealed no mechanical anomalies or malfunctions that would have precluded normal operation. The spark plugs were removed and the propeller was rotated and compression was observed. The closest weather reporting facility is Dillingham Airport, Dillingham, about 3 miles southeast of the accident site. At 2053, an aviation routine weather report (METAR) from the Dillingham Airport was reporting in part: wind from 110 degrees at 7 knots; sky condition, scattered at 8,000 feet agl, scattered at 15,000 agl, broken at 15,000 feet agl; visibility, 30 statute miles; temperature 68 degrees F; dewpoint 52 degrees F; barometric pressure 29.94 inHg.
Aircraft
- Registration
- N8761C
- Reported as
- Piper PA 18-150
- Category
- Airplane
- Serial number
- 18-2848
- Built
- 1953
- Airframe hours
- 4,406.5
- Engine
- Lycoming O-320-A2B, 150 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Flensburg Susan L
- Registered owner
- Flensburg Susan L
- Airworthiness certificate
- Standard, Normal; Special, Restricted (Special)
- Last inspection
- Annual · January 1, 2015 · 12 hours before
- Departed
- 0Z3 · Dillingham, AK
- Destination
- Dillingham, AK
- Flight plan
- VFR
- Airport
- 0Z3 · Shannons Pond, runway NE, 1,400 × 100 ft, water
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
- 63
- Injuries
- None
- Certificate
- Private
- Airplane ratings
- Single-engine land, Single-engine sea
- Medical
- Class 3, With waivers/limitations
- Last flight review
- June 22, 1999
- Seat
- Front
- Restraint
- Lap only
- Flight hours
- 889 total · 672 in this make and model · 888 as pilot in command · 13 in the last 90 days · 13 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Dusk
- Wind
- 110° at 7 knots
- Visibility
- 30 statute miles
- Lowest ceiling
- 15,000 ft broken
- Temperature
- 68 °F, dew point 52 °F
- Altimeter
- 29.94 inHg
- Observed at
- PADL, 2 nm away
Docket · 2
The files NTSB released with the investigation on April 6, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.0 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.