# NTSB FTW99LA050: Beech BE-95-A55, N6DL, Mesquite, TX, December 15, 1998 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: December 15, 1998, 14:00 local (20:00 UTC) - Place: Mesquite, TX - Coordinates: 32.730358, -96.559951 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=32.7304&lon=-96.5600&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report April 6, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 45461 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW99LA050 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/45461/pdf - Page: https://openairdocs.org/ntsb/FTW99LA050 ## Probable cause The student pilot's failure to maintain directional control during a simulated engine failure during takeoff maneuver and the instructor's inadequate supervision. Factors were; the student's lack of total flight time in multiengine airplanes, and the soft ground in which the nose landing gear became embedded when the airplane departed the runway surface. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, takeoff - roll/run - 1 engine - emergency procedure - performed, pilot in command(cfi) (cause) - directional control - not maintained, dual student (cause) - lack of total experience in type of aircraft, dual student - terrain condition - soft (contributing factor) - supervision - inadequate, pilot in command(cfi) (cause) ## Analysis The multi-engine airplane veered off the runway during a practice engine failure on takeoff maneuver [V1 Cut] during an instructional flight. The student taxied the airplane to the runway, performed the takeoff checklist, and commenced the takeoff roll. After assuring that full power had been applied, the instructor covered the mixture controls with a plastic checklist, and pulled the right engine's mixture lever to the 'idle cutoff' position. The student was not able to maintain directional control, and before the instructor could assume the controls, the aircraft departed the runway on the right side onto soft, muddy ground. Subsequently, the nose gear collapsed, and the left propeller struck the ground. The student pilot had a total of 1,887 hours of flight time, of which, 4.7 hours were in multi-engine airplanes. He holds a commercial pilot certificate with ratings in single engine airplanes (land & sea), and a flight instructor certificate with an instructor rating in single engine airplanes. ## Factual narrative On December 15, 1998, approximately 1400 central standard time, a Beech BE-95-A55 twin engine airplane, N6DL, was substantially damaged when it veered off the runway during a simulated engine failure on takeoff maneuver [V1 Cut], at the Mesquite Municipal Airport, Mesquite, Texas. Both occupants, the commercial pilot-in-command [instructor] who was giving instruction and the commercial pilot who was at the controls receiving multi-engine instruction [student], were not injured. Visual meteorological conditions prevailed and a flight plan was not filed for the Title 14 CFR Part 91 instructional flight [The instruction was being administered under the guidelines of Title 14 CFR Part 61]. The flight originated from the Mesquite Airport about 1315, and had completed about 7/10ths of an hour of uneventful flight training prior to the accident. The aircraft was jointly owned and operated by the occupants. The pilot-in-command provided the NTSB investigator-in-charge with a written statement that outlined the events of the accident. A telephone interview with the pilot-in-command was also conducted. The pilot-in-command [instructor] stated that the pilot receiving instruction [student] taxied the airplane to runway 17 [6,000 feet long & 100 feet wide], performed the takeoff checklist, and commenced the takeoff roll. After assuring that full power had been applied, the instructor covered the mixture controls with a plastic checklist, and pulled the right engine's mixture lever to the "idle cutoff" position. The student was not able to maintain directional control, and before the instructor could assume the controls, the aircraft departed the right side of the runway onto soft, muddy ground. Subsequently, the nose gear collapsed, and the left propeller struck the ground. According to data provided in NTSB Form 6120.1/2, the instructor had a total of 2,788 hours of flight time, of which, 324 hours were in multi-engine airplanes, and 312 hours were in the accident airplane. He holds a commercial pilot certificate with ratings in single and multi-engine airplanes, and a flight instructor certificate with instructor ratings in both single and multi-engine airplanes. The student pilot had a total of 1,887 hours of flight time, of which, 4.7 hours were in multi-engine airplanes. He holds a commercial pilot certificate with ratings in single engine airplanes (land & sea), and a flight instructor certificate with an instructor rating in single engine airplanes. Examination of the airplane by a FAA airworthiness inspector revealed that the fuselage was buckled just forward of pilot's [left] windshield. ## Aircraft - Registration: [N6DL](https://openairdocs.org/deregistered/N6DL-2012-08-09), registration cancelled 2012-08-09, S/N TC-381, built 1962 (OpenAirDocs) - Reported make and model: Beech BE-95-A55 - Registry model: [Beech 95-A55](https://openairdocs.org/model/beech-95-a55) (registry code 1152704) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: TC-381 - Airframe hours: 4440 - Engines: Continental IO-470L 260 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Registered owner: C.W. Chase & C.T. Chase - Airworthiness certificate: Standard, Normal - Last inspection: Annual, November 1, 1998, 12 hours before - Departed: HQZ - Airport: HQZ, Mesquite Municipal, runway 17, 6,000 × 100 ft, concrete ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 49; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: right; flight hours: 2,788 total, 313 in this make and model, 2,518 as pilot in command, 17 in the last 90 days, 14 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 55 °F - Altimeter: 30.00 inHg ## 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 19981215046929A](https://openairdocs.org/incident/19981215046929A), Dec 15, 1998: Beech 95A55, Mesquite, TX, No damage. (-23) As a section of multi-engine training, instructor initiated simulated right engine failure by retarding mixture control. Student pilot failed to react… 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.