Thursday, May 24, 2018

Cessna 150F, N7750F: Accident occurred May 17, 2018 at Skylark Field Airport (KILE), Killeen, Bell County, Texas

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; San Antonio, Texas

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/N7750F

Location: Killeen, TX
Accident Number: GAA18CA300
Date & Time: 05/17/2018, 1100 CDT
Registration: N7750F
Aircraft: CESSNA 150
Aircraft Damage: Substantial
Defining Event: Miscellaneous/other
Injuries: 1 None
Flight Conducted Under:  Part 91: General Aviation - Instructional

The pilot reported that, during a max performance takeoff, he set the flaps to 10° and accelerated to 60 mph. He pulled back and pitched the airplane for Vx (best angle climb), 52 mph, to simulate an obstacle, then pitched for Vy (best rate climb), 72 mph, where he observed a rate of descent. He pitched back to gain altitude, but immediately heard the stall warning horn and felt a lack of responsiveness in the flight controls. He leveled the airplane to touch down on the remaining runway, but the right wing and right horizontal stabilizer impacted the runway.

The airplane sustained substantial damage to the right wing and right horizontal stabilizer.

The pilot reported that the cause of the accident was that the published Vx airspeed is below the stall speed.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation, but that it was possible that the engine was not performing at optimal performance.

The airplane owner's manual checklist titled "Maximum Performance Take-Off" states:

Wing Flaps – Up.
Carburetor Heat – Cold.
Brakes – Hold.
Throttle – Full "OPEN".
Brakes – Release.
Elevator Control – Slightly tail low.
Climb Speed – 52 MPH (with obstacles head).
The manual also states:

"Normal and obstacle clearance take-offs are performed with flaps up. The use of 10° flaps will shorten the ground run approximately 10%, but this advantage is lost in the climb to a 50-foot obstacle. Therefore the use of 10° flap is reserved for minimum ground runs or for take-off from soft or rough fields with no obstacles ahead."

The manual also states that the stall speed, with 0° angle of bank, is as follows:

Flaps Up – 55 mph

Flaps 20° - 49 mph

Flaps 40° - 48 mph 

Pilot Information

Certificate: Commercial
Age: 40, Male
Airplane Rating(s): Multi-engine Land
Seat Occupied: Left
Other Aircraft Rating(s): Helicopter
Restraint Used: Lap Only
Instrument Rating(s): Airplane; Helicopter
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 1 Without Waivers/Limitations
Last FAA Medical Exam: 02/26/2018
Occupational Pilot: Yes
Last Flight Review or Equivalent: 08/17/2017
Flight Time:  (Estimated) 492 hours (Total, all aircraft), 60 hours (Total, this make and model), 460 hours (Pilot In Command, all aircraft), 43 hours (Last 90 days, all aircraft), 20 hours (Last 30 days, all aircraft), 5 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: CESSNA
Registration: N7750F
Model/Series: 150 F
Aircraft Category: Airplane
Year of Manufacture: 1966
Amateur Built: No
Airworthiness Certificate: Utility
Serial Number: 15063850
Landing Gear Type: Tricycle
Seats: 2
Date/Type of Last Inspection: 03/07/2018, Annual
Certified Max Gross Wt.: 1600 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time:
Engine Manufacturer: CONT MOTOR
ELT: Installed, not activated
Engine Model/Series: O-200 SERIES
Registered Owner: On file
Rated Power: 100 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: KILE, 841 ft msl
Distance from Accident Site: 0 Nautical Miles
Observation Time: 1556 UTC
Direction from Accident Site: 108°
Lowest Cloud Condition: Clear
Visibility: 10 Miles
Lowest Ceiling: None
Visibility (RVR): 
Wind Speed/Gusts: Calm /
Turbulence Type Forecast/Actual: None / None
Wind Direction:
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 29.93 inches Hg
Temperature/Dew Point: 29°C / 20°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Killeen, TX (ILE)
Type of Flight Plan Filed: None
Destination: Grand Prairie, TX (GPM)
Type of Clearance: None
Departure Time: 1100 CDT
Type of Airspace: Class E

Airport Information

Airport: SKYLARK FIELD (ILE)
Runway Surface Type: Asphalt
Airport Elevation: 847 ft
Runway Surface Condition: Dry
Runway Used: 01
IFR Approach: None
Runway Length/Width: 5495 ft / 100 ft
VFR Approach/Landing: None

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: 31.084167, -97.687222 (est)

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