ASN Wikibase Occurrence # 228775
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| Date: | Friday 6 September 2019 |
| Time: | 12:12 LT |
| Type: |  Van's RV-12 |
| Owner/operator: | Yankee Flyers LLC |
| Registration: | N767FS |
| MSN: | 120053 |
| Year of manufacture: | 2010 |
| Total airframe hrs: | 123 hours |
| Engine model: | Rotax 912ULS |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | SE of Love Field Airport (97FL), Weirsdale, Lake County, FL -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Lady Lake, FL (97FL) |
| Lady Lake, FL (97FL) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot departed with the intent of remaining in the airport traffic pattern. Automatic Dependent Surveillance-Broadcast (ADS-B) data indicated that the airplane departed and climbed to an altitude of about 1,000 ft above ground level. Near the end of the downwind leg, the airplane entered a brief 50-ft climb, followed by a rapid descent to impact with the ground.
Examination of the engine and airframe revealed no evidence of any preimpact mechanical malfunctions that would have precluded normal operation. Examination of the canopy roll bar and the tip-up canopy bow, which are connected in flight when the canopy is latched, indicated that they deformed in a dissimilar manner at impact. The roll bar and canopy bow were located about 12 ft apart at the accident site, and there was little damage to the handle and latch block, indicating that the canopy was likely not latched at the time of impact. Examination of the canopy and latch handle revealed that the handle and washers did not match any of the manufacturer's drawings. The kit manufacturer issued a service letter about 3 years before the accident advising that, in the event of an inflight opening of a forward opening, tip-up canopy, the airplane would 'most likely pitch down abruptly.'
The pilot had recently modified the latch on the airplane's tip-up canopy. The pilot had purchased a latch replacement kit from the airplane manufacturer; however, only the handle from the new latch kit was installed at the time of the accident, and additional washers that were not part of the kit had been added, likely to compensate for the longer dimensions of the new handle assembly. Whether full engagement of the latching mechanism could be achieved in this configuration could not be determined. Additionally, it could not be determined whether the pilot departed with the canopy unlatched or it became unlatched in flight, but it is likely that when the pilot reduced engine power to begin a descent for landing, the canopy opened enough to affect the airplane's pitch control, resulting in a subsequent abrupt descent and impact with terrain.
Probable Cause: The pilot's loss of pitch control due to the in-flight opening of the canopy for reasons that could not be determined.
Accident investigation:
 |
|
Sources:
NTSB ERA19FA265
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=767FS
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 06-Sep-2019 21:20 | Geno | Added |
| 06-Sep-2019 21:43 | Geno | Updated [Location, Narrative] |
| 07-Sep-2019 08:49 | toneale | Updated [Aircraft type, Total occupants, Source] |
| 07-Sep-2019 08:49 | harro | Updated [Total occupants] |
| 07-Sep-2019 09:46 | RobertMB | Updated [Aircraft type, Nature] |
| 09-Sep-2019 15:32 | RobertMB | Updated [Time, Registration, Cn, Operator, Location, Phase, Source, Narrative] |
| 01-Jul-2022 17:39 | ASN Update Bot | Updated [Time, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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