ASN Wikibase Occurrence # 298012
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Thursday 17 May 2018 |
| Time: | 10:00 LT |
| Type: |  Cessna 150 |
| Owner/operator: | |
| Registration: | N7750F |
| MSN: | 15063850 |
| Year of manufacture: | 1966 |
| Engine model: | Continental O-200 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Killeen, Texas -
 United States of America
|
| Phase: | Take off |
| Nature: | Training |
| Departure airport: | Killeen Municipal Airport, TX (ILE/KILE) |
| Grand Prairie Municipal Airport, TX (KGPM) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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, and then pitched for Vy (best rate climb), 72 mph, where he observed that the airplane was descending. 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 was 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" stated:
1. Wing Flaps – Up.
2. Carburetor Heat – Cold.
3. Brakes – Hold.
4. Throttle – Full "OPEN."
5. Brakes – Release.
6. Elevator Control – Slightly tail low.
7. Climb Speed – 52 MPH (with obstacles head).
The manual also stated:
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.
Probable Cause: The pilot's failure to maintain adequate airspeed and his exceedance of the airplane's critical angle of attack during a maximum performance takeoff, which resulted in an aerodynamic stall. Also causal was the pilot's failure to use the appropriate flap setting in accordance with the manufacturer's Maximum Performance Takeoff checklist.
Accident investigation:
 |
|
Sources:
NTSB GAA18CA300
History of this aircraft
Other occurrences involving this aircraft
| 1 May 1979 | N7753F | 1 | near John Day, OR | |
w/o |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2022 11:51 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation