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| Date: | Sunday 26 December 2021 |
| Time: | 13:04 LT |
| Type: |  Mooney M20J 201 |
| Owner/operator: | Sterling Silver Flyers LLC |
| Registration: | N3707H |
| MSN: | 24-0907 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 2127 hours |
| Engine model: | Lycoming IO-360-A3B6D |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Herlong Recreational Airport (HEG/KHEG), Jacksonville, FL -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Jacksonville-Herlong Airport, FL (KHEG) |
| Jacksonville-Herlong Airport, FL (KHEG) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot departed on a local 20-minute flight before returning to the airport traffic pattern. After performing a low approach to the runway, the airplane began to climb slowly from an altitude of about 50-100 ft. While over the runway, just as the landing gear were raised, the baggage door fully opened. A witness reported that after the door opened, the airplane stopped climbing and began a slight turn to the right. Another witness reported that as the airplane was at an altitude of 200-400 ft, along the runway extended centerline, the right wing “dropped' and the airplane appeared to enter a spin, which continued until it impacted the ground. The airplane came to rest upright in a field, with no debris path or ground scars in the vicinity of the wreckage. It was partially consumed by a postcrash fire. Examination of the airplane revealed no preimpact anomalies that would have precluded normal operation.
The witness descriptions as well as the lack of any lateral debris path or ground scars at the accident site were consistent with an aerodynamic stall/spin. Automatic dependent surveillance – broadcast (ADS-B) data indicated that as the airplane overflew the runway, its groundspeed varied between about 50 and 56 knots. The reported wind at the time of the accident was a headwind of 8-9 knots. These speeds are close to the airplane's published stall speeds, which vary from about 55 to 63 knots, depending on flap and landing gear configuration. Based on this information, it is likely that the opening of the baggage door startled and/or distracted the pilot, drawing his attention away from maintaining the airspeed. The airplane then likely slowed, which led to a stall and subsequent spin.
Toxicology results identified low levels of both amphetamine and diphenhydramine in the pilot's cavity blood. The reason for the pilot's use of amphetamine could not be determined from the available information; personal health records could not be obtained. Thus, whether he was at increased risk for distraction from an underlying attention deficit disorder is unknown and any effects from such a condition could not be determined. Given the low level of diphenhydramine in postmortem cavity blood, it is unlikely that any effects from his use of diphenhydramine contributed to the accident.
Probable Cause:
The pilot's failure to maintain airspeed during initial climb, which resulted in an aerodynamic stall/spin. Contributing was the pilot's likely distraction due to the opening of the baggage door.
Accident investigation:
 |
|
Sources:
NTSB ERA22FA095
FAA register: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=N3707H
https://flightaware.com/live/flight/N3707H
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-Dec-2021 20:12 | Geno | Added |
| 26-Dec-2021 21:53 | Captain Adam | Updated [Registration, Cn, Operator, Total fatalities, Phase, Nature, Departure airport, Destination airport, Source, Narrative, ] |
| 26-Dec-2021 23:38 | RobertMB | Updated [Location, Source, Damage, Narrative, ] |
| 27-Dec-2021 00:25 | johnwg | Updated [Time, Phase, Source, Narrative, ] |
| 27-Dec-2021 00:27 | johnwg | Updated [Category, ] |
| 27-Dec-2021 19:41 | Captain Adam | Updated [Phase, Source, Narrative, ] |
| 28-Dec-2021 00:22 | johnwg | Updated [Phase, Source, Narrative, ] |
| 13-Jan-2022 17:02 | aaronwk | Updated [Time, Source, Narrative, Category, ] |
| 18-Jan-2022 00:25 | Captain Adam | Updated [Location, Source, Narrative, ] |
| 10-Oct-2022 01:51 | RobertMB | Updated [Narrative, ] |
| 04-Feb-2024 19:39 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Destination airport, Source, Damage, Narrative, Accident report, ] |
| 04-Feb-2024 19:41 | ASN | Updated [Departure airport, Destination airport, Source, Narrative, ] |
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