# NTSB CEN20LA304: Brantly B2B, N383ES, Monrovia, IN, July 24, 2020 - Type: NTSB accident investigation - Classification: Accident · Fatal · Class 3 · Limited · Final report - Date: July 24, 2020, 13:16 local (17:16 UTC) - Place: Monrovia, IN - Coordinates: 39.570869, -86.500274 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.5709&lon=-86.5003&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Defining event: [Initial climb: Loss of control in flight](https://openairdocs.org/ntsb-events/240) - Highest injury: Fatal - Injuries: 1 fatal - Status: Completed - Report: Approved by Office Director - Investigation class: Class 3 - NTSB office: Central Region - Parties: Federal Aviation Administration; Indianpolis FSDO - NTSB case key (mKey): 101666 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN20LA304 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/101666/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=101666 - Page: https://openairdocs.org/ntsb/CEN20LA304 ## Probable cause The pilot’s loss of control after takeoff for reasons that could not be determined based on the available information. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters](https://openairdocs.org/ntsb-findings/01062000): Aircraft › Aircraft oper/perf/capability · Unknown/Not determined (probable cause); cases with it: [Brantly B-2B, 3 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md?model=1440506), [All aircraft, 1,269 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Initial climb: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [Brantly B-2B, 8 cases](https://openairdocs.org/ntsb-events/240/sequence.md?model=1440506), [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md) - [Uncontrolled descent: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Brantly B-2B, 6 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=1440506), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot was performing an annual inspection and maintenance flight for the helicopter at the time of the accident. After the pilot completed three or four short flights prior to attempting an additional flight. During this flight, the helicopter was exiting translational lift when it dipped and turned right abruptly and hit the ground. Postaccident examination of the helicopter confirmed flight control continuity. Additional examinations of the engine were limited due to damage incurred from impact damage and postimpact fire. The reasons for any loss of control and/or engine failure could not be determined. There was no available evidence that a medical factor contributed to the crash. ## Factual narrative On July 24, 2020, about 1316 eastern daylight time, a Brantly B2B helicopter, N383ES, was destroyed when it was involved in an accident near Monrovia, Indiana. The pilot was fatally injured. The helicopter was operated as a Title 14 Code of Federal Regulations Part 91 maintenance test flight. A witness stated that the pilot was performing a maintenance test flight, after a 100-hour interval and annual inspection was performed. The pilot completed three or four short flights around the pilot's property before taking off and traveling southerly at an altitude of about 20 ft above ground level. The pilot’s wife stated that it sounded like the helicopter was “missing.” A witness stated that it looked like the helicopter was exiting effective translational lift when the helicopter dipped, it turned right abruptly, and hit the ground. A post-crash fire started immediately, and the wreckage was destroyed. The pilot initially survived and was transported to a hospital for specialized burn/trauma care. No significant pre-existing natural disease was documented. An early hospital blood test for ethanol was negative. The pilot succumbed to his injuries on the day of the accident. The Marion County Coroner's Office performed the pilot’s autopsy, which was limited to an external examination only. According to the autopsy report, the cause of death was thermal burn injuries, and the manner of death was accident. Toxicological testing detected the medications amlodipine and atorvastatin in the pilot’s blood. Those medications generally are not considered impairing. Also detected in blood were morphine, ketamine, norketamine, and etomidate, all of which were attributable to medications administered to the pilot during his initial medical care after the accident. The wreckage was destroyed by impact forces and post-crash fire. The landing gear skid were separated from the fuselage. The main rotor assembly and tail rotor assembly were separated from the fuselage and tailboom, both of which were resting along the wreckage path. The tailboom, with the tail rotor driveshaft, was attached to the fuselage. A postaccident examination of the engine cylinders using a borescopeshowed no amonalies. Continuity of the engine valve and drive train to the accessory section was confirmed. The accessories could not undergo functional testing due to post-crash fire and impact damage. Examination of the flight control system confirmed flight control continuity. ## Aircraft - Registration: [N383ES](https://openairdocs.org/aircraft/N383ES), registered now, S/N 344 (OpenAirDocs) - Reported make and model: Brantly B2B - Registry model: [Brantly B-2B](https://openairdocs.org/model/brantly-b-2b) (registry code 1440506) (OpenAirDocs) - Category: Helicopter - Serial number: 344 - Year built: 1963 - Engines: Lycoming IVO-360-A1 180 horsepower reciprocating - Damage: Destroyed - Fire: On-Ground - Flight: Flight test, Part 91 - Registered owner: Drake Air LLC - Airworthiness certificate: Standard, Normal - Departed: PVT, Monrovia, IN - Destination: PVT, Monrovia, IN - Airport: PVT, Private ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 75; injuries: fatal; commercial, flight instructor; medical: class 3, with waivers/limitations; seat: right; toxicology performed; flight hours: 4,400 total ## Weather - Conditions: Visual (VMC), Day ## 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 20200724010989A](https://openairdocs.org/incident/20200724010989A), Jul 24, 2020: Brantly B-2B, Monrovia, IN, Destroyed, 1 fatal. On July 24, 2020, at approximately 1300 eastern daylight time, a 1963 Brantly B2B rotorcraft, N383ES, was destroyed after crashing to the ground near Monrovia,… ## Docket (7 files) The files NTSB released with the investigation on July 26, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=101666. 3.1 MB in all. - Police report narrative (item 1, PDF, 1 page, 778 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14124582&FileExtension=pdf&FileName=Police%20Report%20Narrative%20Master_Redacted-Rel.pdf - Record of correspondence - FAA (item 2, PDF, 1 page, 106 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14186120&FileExtension=pdf&FileName=RECORD%20OF%20CORRESPONDENCE%20-%20FAA-Rel.pdf - Record of conversation - FAA (item 3, PDF, 1 page, 110 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14121297&FileExtension=pdf&FileName=RECORD%20OF%20CONVERSATION%20FAA-Rel.pdf - FAA site diagram (item 4, PDF, 1 page, 58 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14119522&FileExtension=pdf&FileName=Site%20Diagram%20general-Rel.pdf - Photo log (item 5, PDF, 4 pages, 1.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14123804&FileExtension=pdf&FileName=Photo%20Log-Rel.pdf - FAA forensic toxicology report (item 6, PDF, 1 page, 162 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13917230&FileExtension=pdf&FileName=Tox%20Master_Redacted-Rel.pdf - Medical factual report (item 7, PDF, 3 pages, 198 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14044298&FileExtension=pdf&FileName=CEN20LA304_MedicalFactualReport-Rel.pdf 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.