ASN Wikibase Occurrence # 197052
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| Date: | Sunday 30 July 2017 |
| Time: | 10:25 |
| Type: |  Cessna 172S Skyhawk |
| Owner/operator: | Arrow Aviation LLC |
| Registration: | N612DF |
| MSN: | 172S10201 |
| Year of manufacture: | 2006 |
| Total airframe hrs: | 4013 hours |
| Engine model: | Lycoming IO-360-L2A |
| Fatalities: | Fatalities: 1 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Danbury, CT -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | Danbury Airport, CT (DXR/KDXR) |
| Danbury Airport, CT (DXR/KDXR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The private pilot and two passengers were departing in the airplane from the 4,422-ft-long asphalt runway. A witness reported that, while still over the runway, the airplane began to lose altitude, then entered a nose-high attitude. The airplane subsequently entered a left-turning descent consistent with an aerodynamic stall. Examination of the wreckage did not reveal any preimpact mechanical anomalies; although the ignition key was found in the left magneto position, the preimpact position of the key could not be determined.
Performance calculations revealed that the airplane should have used less than half the available runway distance to clear a 50-ft obstacle at maximum gross weight with flaps extended to 10°. Weight and balance calculations revealed that the airplane was operating about 59 lbs over its maximum allowable gross weight at the time of the accident, and the flaps were found in the retracted position. It is likely that the pilot noticed the airplane's degraded climb performance after takeoff and attempted to compensate by increasing the airplane's pitch attitude, which resulted in decaying airspeed, an exceedance of the critical angle of attack, and an aerodynamic stall.
Probable Cause: The pilot's exceedance of the airplane's critical angle of attack during initial climb, which resulted in an aerodynamic stall. Contributing to the accident was the pilot's decision to operate the airplane above its maximum gross weight, which likely reduced its takeoff performance.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N612DF
Location
Images:
Photo: FAA
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 30-Jul-2017 17:48 | Iceman 29 | Added |
| 30-Jul-2017 17:48 | Iceman 29 | Updated [Embed code, Narrative] |
| 30-Jul-2017 17:56 | Iceman 29 | Updated [Aircraft type, Location, Departure airport, Source, Narrative] |
| 30-Jul-2017 18:07 | gerard57 | Updated [Operator, Country] |
| 30-Jul-2017 18:10 | Iceman 29 | Updated [Location, Embed code, Photo, ] |
| 30-Jul-2017 18:41 | Geno | Updated [Registration, Cn, Operator, Location, Source, Damage, Narrative] |
| 30-Jul-2017 19:09 | Aerossurance | Updated [Location, Narrative] |
| 30-Jul-2017 19:09 | Aerossurance | Updated [Operator, Nature, Narrative] |
| 30-Jul-2017 19:55 | Iceman 29 | Updated [Operator, Source, Embed code, Narrative] |
| 31-Jul-2017 21:44 | Iceman 29 | Updated [Embed code] |
| 06-Aug-2017 08:11 | rfdham | Updated [Total fatalities] |
| 06-Aug-2017 16:35 | Iceman 29 | Updated [Source, Narrative] |
| 20-Aug-2018 11:33 | Iceman 29 | Updated [Operator, Source, Narrative] |
| 15-Sep-2019 10:17 | ASN Update Bot | Updated [Time, Operator, Country, Departure airport, Destination airport, Source, Embed code, Narrative, Accident report, ] |
| 15-Sep-2019 12:25 | harro | Updated [Country, Departure airport, Destination airport, Source, Embed code, Narrative, Photo] |
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