# NTSB FTW93LA178: Bell-Transworld 47G-2, N9238Z, Wynne, AR, June 5, 1993 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 5, 1993, 14:45 local (19:45 UTC) - Place: Wynne, AR - Coordinates: 35.230278, -90.780815 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=35.2303&lon=-90.7808&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report September 13, 1994 - Report: Approved by Office Director - NTSB case key (mKey): 18766 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW93LA178 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18766/pdf - Page: https://openairdocs.org/ntsb/FTW93LA178 ## Probable cause PARTIAL POWER LOSS DUE TO THE FAILURE OF ONE MAGNETO. A FACTOR WAS THE LACK OF SUITABLE TERRAIN FOR THE FORCED LANDING. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application - ignition system,magneto - failure,total (cause) - reason for occurrence undetermined - Forced landing, descent - emergency - In flight collision with object, descent - emergency - object - tree(s) - terrain condition - none suitable (contributing factor) ## Analysis ACCORDING TO THE PILOT, HE HAD PULLED UP FROM A SWATH RUN WHEN THE ENGINE LOST PARTIAL POWER. HE FURTHER STATED THAT HE WAS UNABLE TO SUSTAIN LEVEL FLIGHT AND THE AIRCRAFT SETTLED INTO TREES. ACCORDING TO THE OPERATOR, POST-ACCIDENT INSPECTION REVEALED THAT THE ENGINE HAD EXPRERIENCED A MAGNETO FAILURE. ## Factual narrative On June 5, 1993, at approximately 1445 central daylight time, a Bell-Transworld Helicopter Corporation 47G-2, N9238Z, was substantially damaged when it collided with trees during an uncontrolled descent, near Wynne, Arkansas. The aircraft, owned and operated by Jimair, and flown by a commercial pilot, was on a local aerial application flight. There was no flight plan filed and visual meteorological conditions prevailed throughout the area. The pilot, the sole occupant, was not injured. According to the pilot, he was about to finish seeding a field with rice when he pulled up from a swath run and the engine lost power. The pilot stated that as he pulled up, the engine "bogged down" and lost power, but did not quit totally. He further stated that the aircraft began to settle toward the ground and collided with trees. The aircraft subsequently impacted the ground. According to information received from the operator, post-accident inspection revealed that the engine had experienced a magneto failure. ## Aircraft - Registration: [N9238Z](https://openairdocs.org/deregistered/N9238Z-2018-03-07), registration cancelled 2018-03-07, S/N TWH-5, built 1976 (OpenAirDocs) - Reported make and model: Bell-Transworld 47G-2 - Registry model: [Bell-Transworld Helicopter Cor 47G-2](https://openairdocs.org/model/bell-transworld-helicopter-cor-47g-2) (registry code 1181071) (OpenAirDocs) - Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs) - Category: Helicopter - Serial number: TWH-5 - Engines: LYCOMING IO-430 265 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Registered owner: Jimair - Airworthiness certificate: Standard, Utility - Last inspection: Annual, January 1, 1992, 102 hours before - Departed: NONE - Destination: NONE ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 42; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane, helicopter; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 6,599 total, 6,500 as pilot in command, 300 in the last 90 days, 150 in the last 30 days, 6 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 5 knots - Visibility: 25 statute miles - Lowest ceiling: none - Temperature: 61 °F ## 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 19930605017379A](https://openairdocs.org/incident/19930605017379A), Jun 5, 1993: Bell 47G2, Wynne, AR, Substantial damage. Lost partial power on pullup from swath run. Settled into trees. A magneto had failed. ## Other investigations on N9238Z (2) 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. - [NTSB FTW92DPG15](https://openairdocs.org/ntsb/FTW92DPG15), Aug 19, 1992: Bell-Transworld 47G-2 (N9238Z), Birdeye, AR, substantial damage. Probable cause: FUEL CONTAMINATION. A FACTOR WAS THE HIGH DENSITY ALTITUDE. - [NTSB CHI76FEA35](https://openairdocs.org/ntsb/CHI76FEA35), May 22, 1976: Bell 47G-2 (N9238Z), Monticello, IN, substantial damage 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.