- Date
- July 16, 2021, 12:20 local (20:20 UTC)
- Place
- Skwentna, AK · NE Corner of Chelatna Lake
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N99640Piper PA-18-135
- Defining event
- Landing-landing roll: Nose over/nose down
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- Investigation class
- Class 4 - Basic report with no Prelim publish
- NTSB office
- Alaska Regional Office
- Parties
- FAA
- FAA report
- 20210716010769A
- Case key
- 103516
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 use of excessive braking which resulted in a nose-over.
Findings · 3
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 stated that he was landing on an unimproved runway with calm winds. After landing, he applied brakes, but felt he needed more. When he increased brake pressure, the tail of the airplane rose, the prop struck the ground and the airplane flipped over, resulting in substantial damage to the rudder, vertical stabilizer and right lift strut. The pilot reported that there were no mechanical malfunctions or failures that would have precluded normal operation.
Aircraft
- Registration
- N99640
- Reported as
- Piper PA-18-135
- Category
- Airplane
- Serial number
- 54-2642
- Built
- 1954
- Airframe hours
- 3,542
- Engine
- Lycoming O320-A2B, 160 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- B-407 LLC
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · September 8, 2020 · 55 hours before
- Departed
- 4AK6 · Wasilla, AK
- Destination
- Same as departure
- Airport
- PVT · Private
- Equipment
- ADS-B, Electronic flight bag or handheld device
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
- 71
- Injuries
- None
- Certificates
- Airline transport, Commercial, Flight instructor
- Airplane ratings
- Single-engine land, Single-engine sea, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- BasicMed
- Last flight review
- June 19, 2021
- Seat
- Rear
- Restraint
- 4-point
- Flight hours
- 27,085 total · 84 in this make and model · 19,132 as pilot in command · 30 in the last 90 days · 10 in the last 30 days · 4 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 310° at 3 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 70 °F, dew point 52 °F
- Altimeter
- 30.03 inHg
- Observed at
- PATK, 41 nm away
- METAR
- PATK 161953Z 31003KT 10SM CLR 21/11 A3003 RMK AO2 SLP169 T02110111
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 N99640 · 1
Matched to the same aircraft by N-number and date.