Monday, August 7, 2017

Cessna 172F, N8226U: Accident occurred August 04, 2017 in Drexel, Missouri

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Location: Drexel, MO
Accident Number: GAA17CA476
Date & Time: 08/04/2017, 1923 CDT
Registration: N8226U
Aircraft: CESSNA 172
Aircraft Damage: Substantial
Defining Event: Aerodynamic stall/spin
Injuries: 1 None
Flight Conducted Under: Part 91: General Aviation - Personal

Analysis 

The pilot reported that, during the initial climb, the airplane aerodynamically stalled and impacted terrain.

The airplane sustained substantial damage to the left wing.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. 

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's failure to maintain adequate airspeed and his exceedance of the airplane's critical angle of attack, which resulted in an aerodynamic stall.

Findings

Aircraft
Angle of attack - Capability exceeded (Cause)
Airspeed - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)

Factual Information

History of Flight

Takeoff
Aerodynamic stall/spin (Defining event)
Collision with terr/obj (non-CFIT) 

Pilot Information

Certificate: Private
Age: 60, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: Unknown Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 3 Without Waivers/Limitations
Last FAA Medical Exam: 02/14/2017
Occupational Pilot: No
Last Flight Review or Equivalent: 03/26/2017
Flight Time:  (Estimated) 2026 hours (Total, all aircraft), 1700 hours (Total, this make and model), 1960 hours (Pilot In Command, all aircraft), 75 hours (Last 90 days, all aircraft), 28 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Manufacturer: CESSNA
Registration: N8226U
Model/Series: 172 F
Aircraft Category: Airplane
Year of Manufacture: 1964
Amateur Built: No 
Airworthiness Certificate: Normal
Serial Number: 17252126
Landing Gear Type: Tricycle
Seats: 4
Date/Type of Last Inspection: 01/01/2017, Annual
Certified Max Gross Wt.: 2300 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time:
Engine Manufacturer: CONT MOTOR
ELT: Installed, not activated
Engine Model/Series: O-300-D
Registered Owner: On file
Rated Power: 145 hp
Operator: On file
Operating Certificate(s) Held: None 

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: KLRY, 915 ft msl
Observation Time: 1235 UTC
Distance from Accident Site: 11 Nautical Miles
Direction from Accident Site: 69°
Lowest Cloud Condition: Clear
Temperature/Dew Point: 15°C / 10°C
Lowest Ceiling: None
Visibility:  10 Miles
Wind Speed/Gusts, Direction: 4 knots, 10°
Visibility (RVR):
Altimeter Setting: 30.19 inches Hg
Visibility (RVV): 
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Drexel, MO
Type of Flight Plan Filed: None
Destination: LEE'S SUMMIT, MO (LXT)
Type of Clearance: None
Departure Time: 1923 CDT
Type of Airspace: Class G 

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 38.540278, -94.560556 (est)

Preventing Similar Accidents  

Prevent Aerodynamic Stalls at Low Altitude

While maneuvering an airplane at low altitude in visual meteorological conditions, many pilots fail to avoid conditions that lead to an aerodynamic stall, recognize the warning signs of a stall onset, and apply appropriate recovery techniques. Many stall accidents result when a pilot is momentarily distracted from the primary task of flying, such as while maneuvering in the airport traffic pattern, during an emergency, or when fixating on ground objects.

An aerodynamic stall can happen at any airspeed, at any altitude, and with any engine power setting. Pilots need to be honest with themselves about their knowledge of stalls and preparedness to recognize and handle a stall situation. Training can help pilots fully understand the stall phenomenon, including angle-of-attack (AOA) concepts and how weight, center of gravity, turbulence, maneuvering loads, and other factors can affect an airplane's stall characteristics. The stall characteristics may be different in each type of airplane, so learn them before you fly.

The stall airspeeds marked on the airspeed indicator (for example, the bottom of the green arc and the bottom of the white arc) typically represent steady flight speeds at 1G at the airplane's maximum gross weight in the specified configuration. Maneuvering loads and other factors can increase the airspeed at which the airplane will stall. For example, increasing bank angle can increase stall speed exponentially.

Reducing AOA by lowering the airplane's nose at the first indication of a stall is the most important immediate response for stall avoidance and stall recovery. This may seem counterintuitive at low altitudes, but is a necessary first step.

See http://www.ntsb.gov/safety/safety-alerts/documents/SA_019.pdf for additional resources.

The NTSB presents this information to prevent recurrence of similar accidents. Note that this should not be considered guidance from the regulator, nor does this supersede existing FAA Regulations (FARs).

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Kansas City, Missouri

Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms

http://registry.faa.gov/N8226U

NTSB Identification: GAA17CA476
14 CFR Part 91: General Aviation
Accident occurred Friday, August 04, 2017 in Drexel, MO
Aircraft: CESSNA 172, registration: N8226U
Injuries: 1 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The pilot reported that, during the initial climb, the airplane aerodynamically stalled and impacted terrain.

The airplane sustained substantial damage to the left wing.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

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