Probable cause
The pilot’s use of excessive braking which resulted in a nose-over.
NTSB 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.
Text from the NTSB. Open the NTSB docket for ANC21LA060 for the full record.
Event
- Date
- Jul 16, 2021
- Type
- Accident
- Place
- Skwentna, Alaska
- Nearest airport
- Private (PVT)
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Piper PA-18-135
- N-number
- N99640
- Category
- Airplane
- Year built
- 1954
- Damage
- Substantial
- Operating rule
- Part 91 (general aviation)
- Purpose of flight
- Personal
Other records under this N-number
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.