# NTSB ATL95LA165: Allen Mustang II, N11AA, Jasper, TN, September 9, 1995 - Type: NTSB accident investigation - Classification: Accident · Fatal · Limited investigation · Final report - Date: September 9, 1995, 14:17 local (19:17 UTC) - Place: Jasper, TN - Coordinates: 35.050785, -85.620094 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=35.0508&lon=-85.6201&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 2 fatal - Status: Completed, report April 1, 1996 - Report: Approved by Office Director - NTSB case key (mKey): 3621 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL95LA165 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/3621/pdf - Page: https://openairdocs.org/ntsb/ATL95LA165 ## Probable cause The pilot's failure to maintain flying speed which resulted in an aerodynamic stall. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, climb - airspeed - not maintained, pilot in command (cause) - stall - inadvertent, pilot in command (cause) - In flight collision with terrain/water, descent - uncontrolled ## Analysis Witnesses reported that the pilot executed a steep left climbing turn after lift off from runway 22. They also stated that the climb attitude remained steep until the airplane stalled. Examination of the aircraft failed to disclose a mechanical failure or system malfunction. ## Factual narrative 0n September 9, 1995, at 1417 central daylight time, an Allen Mustang II, N11AA, collided with the ground during a climbout from runway 22 at Marion County-Brown Field in Jasper, Tennessee. The personal flight operated under the provisions of 14 CFR Part 91, with no flight plan filed. Visual weather conditions prevailed at the time of the accident. The aircraft sustained substantial damage; the pilot and passenger were fatally injured. The flight's exact departure time from Collegedale, Tennessee, was not determined. The fixed based operator at Collegedale Airport reported that the aircraft was refueled with eight gallons of aviation fuel before the flight departed for Jasper. There were no reports of the exact time the flight landed at Jasper. During the flight's attempted departure from Jasper, there were several witnesses at the airport. According to witnesses, the pilot executed a steep, left climbing turn after the lift off from runway 22. The witnesses also stated that the climb attitude appeared excessive, and remained excessive until the airplane stalled; the airplane subsequently rolled left and entered a spin. Examination of the airframe failed to disclose a mechanical problem or system malfunction. The examination of the accident site revealed that the aircraft sustained frontal ground impact damage. The engine assembly was displaced rearward into the cockpit area, and the wing assemblies sustained leading edge damage. Further examination revealed that the empennage was torn from the fuselage. An examination of the cockpit area disclosed that the pilot and passenger seat belt and shoulder harness assemblies had failed; both restraint systems were torn apart at the web stitching. An examination of the engine assembly failed to disclose a malfunction. The engine assembly sustained impact damage that also damaged the carburetor assembly. The examination revealed that the engine had been modified with an electronic ignition system that replaced one of the two normally installed magnetos. The one installed magneto was field checked, and produced an ignition spark on all cylinders. Despite the impact damage, the engine assembly was rotated, and no binding was noted. The autopsy on the pilot was conducted by Dr. Robert Harlen, at the Office of Forensic Science in Nashville, Tennessee, on September 9, 1995. Toxicological examinations were negative for drugs and alcohol. ## Aircraft - Registration: [N11AA](https://openairdocs.org/deregistered/N11AA-1997-01-22), registration cancelled 1997-01-22, S/N 95 (OpenAirDocs) - Reported make and model: ALLEN MUSTANG II - Registry model: [Allen MUSTANG II](https://openairdocs.org/model/allen-mustang-ii) (registry code 1690430) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 1690430 - Airframe hours: 340 - Engines: LYCOMING O-320-A2B 160 horsepower reciprocating - Damage: Destroyed - Flight: Personal, Part 91 - Registered owner: Douglas B. Spears Jr. - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, January 15, 1995, 5 hours before - Departed: 3M3, COLLEGEDALE, TN - Airport: APT, Marion County-Brown Field, runway 22, 3,500 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 650 total ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 88 °F, dew point 63 °F - Altimeter: 29.00 inHg - Observed at: CHA, 40 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19950909028079A](https://openairdocs.org/incident/19950909028079A), Sep 9, 1995: Amtrbb MUSTANG2, Jasper, TN, Substantial damage, 2 fatal. Steep climbing turn after liftoff resulted in a stall spin accident. Fatal impact. From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.