# NTSB IAD97LA003: Maule MX-7, N6124Q, Mahopac, NY, October 5, 1996 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: October 5, 1996, 14:39 local (18:39 UTC) - Place: Mahopac, NY - Coordinates: 41.360137, -73.7406 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=41.3601&lon=-73.7406&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 15, 1998 - Report: Approved by Office Director - NTSB case key (mKey): 28148 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD97LA003 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/28148/pdf - Page: https://openairdocs.org/ntsb/IAD97LA003 ## Probable cause the pilot's failure to maintain directional control during takeoff, which resulted in a inflight collision with trees (sapplings). A factor related to the accident was: the quartering tailwind that was encountered during takeoff. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, takeoff - weather condition - tailwind (contributing factor) - weather condition - crosswind (contributing factor) - directional control - not maintained, pilot in command (cause) - In flight collision with object, takeoff - object - tree(s) (contributing factor) ## Analysis The private pilot and passenger flew to a private airstrip and completed two full stop landings to the south on the turf runway. After a brief stop, the pilot noticed that the active runway had changed to the north. He taxied to the south end of the runway, completed engine checks, and set 24 degrees of flaps. The pilot stated, 'as I fully opened the throttle, I held back-pressure and some right rudder to maximize tail-wheel steering.' The pilot stated that 'the south end of the field was much rougher than he expected, and after a strong bounce, the airplane remained airborne in ground effect.' Also, the pilot stated that he was so focused on the airplane's lack of acceleration, that he did not realize it was headed directly towards a stand of saplings. The airplane impacted the trees in a wings level attitude less than 10 feet off the ground. The airplane had traveled a distance of less than 700 feet, and drifted off the left side of the turf runway. Winds recorded at an airport 18 miles to the south were from 130 degrees at 8 knots. ## Factual narrative On October 5, 1996, approximately 1439 eastern daylight time, a Maule MX-7, N6124Q, was substantially damaged when it impacted trees during takeoff from Mahopac Airport, Mahopac, New York. The certificated private pilot/owner and the passenger were uninjured. Visual meteorological conditions prevailed and no flight plan was filed for the personal flight conducted under 14 CFR Part 91. The pilot stated that they took off from Danbury Municipal Airport, Danbury, Connecticut, approximately 1400, and flew directly to the private grass strip at Mahopac. The runway at Mahopac was oriented north/south and was 1,800 X 150 feet. The private pilot stated that he completed two full stop landings to the south, and then shutdown the airplane for a brief stop. On startup, the pilot noticed that the active runway had changed to the north, and stated that he had never taken off or landed in that direction. He taxied to the south, completed the takeoff checklist, and added 24 degrees of flaps. The pilot stated, "as I fully opened the throttle, I held back-pressure and some right rudder to maximize tail-wheel steering." The pilot also stated that, "the south end of the field was much rougher than he expected, and after a strong bounce, the airplane remained airborne in ground effect". The pilot stated that he focused on the airplane's lack of acceleration, and did not see the group of saplings until they "loomed" in the windshield. With the airspeed too slow to climb, the pilot stated that the airplane impacted the trees in a wings level attitude less than 10 feet off the ground. The pilot depicted the runway with no centerline markings and sloped uphill from the south to the north end of the runway. The measurements taken of the accident showed the airplane traveled a distance of 700 feet down the runway and drifted left more than 75 feet into the saplings. The pilot stated that he had no mechanical problem with the engine nor with the airplane's flight controls. Winds at an airport 18 miles to the south of Mahopac were reported to be from 130 degrees at 8 knots. ## Aircraft - Registration: [N6124Q](https://openairdocs.org/aircraft/N6124Q), registered now, S/N 10073C (OpenAirDocs) - Reported make and model: Maule MX-7 - Registry model: [Maule MX-7-235](https://openairdocs.org/model/maule-mx-7-235) (registry code 5470207) (OpenAirDocs) - Registry engine: [Lycoming IO-540 series](https://openairdocs.org/engine/lycoming-io-540-series) (registry code 41530, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 10073C - Airframe hours: 120 - Engines: Lycoming IO-235 W1A5D 235 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: David Macklin - Airworthiness certificate: Standard, Normal - Last inspection: Annual, January 1, 1996, 20 hours before - Departed: 0000, NY - Destination: DXR, DANBURY, CT - Airport: NONE, Mahopac, runway 1, 1,800 × 150 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 78; private; airplane ratings: single-engine land, single-engine sea; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 1,200 total, 120 in this make and model, 1,200 as pilot in command, 20 in the last 90 days, 5 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 130° at 8 knots - Visibility: 20 statute miles - Temperature: 52 °F, dew point 36 °F - Altimeter: 30.00 inHg - Observed at: HPN, 18 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 19961005031059A](https://openairdocs.org/incident/19961005031059A), Oct 5, 1996: Maule MX7235, Mahopac, NY, Substantial damage. Aircraft veered off left side of runway and struck trees on takeoff. 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.