# NTSB FTW95LA356: Enstrom 280C, N911BT, Houston, TX, August 21, 1995 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 21, 1995, 09:40 local (14:40 UTC) - Place: Houston, TX - Coordinates: 29.750953, -95.47068 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=29.7510&lon=-95.4707&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report January 19, 1996 - Report: Approved by Office Director - NTSB case key (mKey): 19550 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW95LA356 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/19550/pdf - Page: https://openairdocs.org/ntsb/FTW95LA356 ## Probable cause THE FLIGHT INSTRUCTOR'S POOR JUDGEMENT, AND HIS DISREGARD OF THE OWNER'S OBJECTION TO AIR TAXI INTO THE HANGAR. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight collision with object, hover - object - hangar/airport building - procedures/directives - disregarded, pilot in command(cfi) (cause) - judgment - poor, pilot in command(cfi) (cause) ## Analysis THE OWNER OF THE HELICOPTER WAS NOT RATED IN ROTORCRAFT. HE AND A FLIGHT INSTRUCTOR WENT ON A DUAL INSTRUCTIONAL FLIGHT WITH BOTH DOORS REMOVED FROM THE HELICOPTER. AT THE END OF THE FLIGHT, THE OWNER HOVERED TO A CONCRETE PAD IN FRONT OF THE HANGAR AND LANDED. MODERATE RAIN WAS FALLING AS THE OWNER REACHED FOR THE CHECKLIST TO SHUTDOWN THE ENGINE. THE FLIGHT INSTRUCTOR TOLD HIM NOT TO SHUTDOWN THE ENGINE, AS HE WOULD TAXI THE HELICOPTER INSIDE THE HANGAR (TO AVOID GETTING WET). THE OWNER SAID 'NO' AND STATED THAT IT WOULD TAKE ONLY 'A MINUTE' FOR HIM TO GET THE HELICOPTER DOORS AND INSTALL THEM. HOWEVER, DESPITE THE OWNER'S OBJECTION, THE FLIGHT INSTRUCTOR TOOK THE CONTROLS AND BEGAN TO HOVER TAXI THE HELICOPTER INTO THE HANGAR WITH THE SKIDS CLOSE TO THE GROUND. THE OWNER STATED THAT THE HELICOPTER WAS INSIDE THE HANGAR WHEN HE 'FELT A GUST OR SLIGHT UPDRAFT.' AT THAT TIME, THE MAIN ROTOR BLADES IMPACTED THE TOP STRUCTURE OF THE HANGAR, DESTROYING ALL 3 MAIN ROTOR BLADES. ## Factual narrative On August 21, 1995, at 0940 central daylight time, an Enstrom 280C, N911BT, was substantially damaged upon collision with a hangar while hover taxiing near Houston, Texas. The flight instructor and the instrument rated private pilot receiving instruction were not injured. The instructional flight was conducted under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the local flight for which no flight plan was filed. The owner of the helicopter was not rotorcraft rated, and had been receiving dual instruction in his helicopter since July 22, 1995, with 9.1 hours of dual instruction being logged in the helicopter at the time of the accident. According to the owner, the instructional flight was conducted with both doors removed from the helicopter. Following the last landing the owner hovered the helicopter to a concrete pad in front of his hangar. After landing the helicopter he reached for the checklist to execute a normal shutdown. A moderate rain was falling, and the flight instructor told the pilot "not to shutdown the engine and he would taxi it into the hangar." The owner reports he responded to the flight instructor no. The owner further reported that he told the flight instructor that "it would only take him a minute to go get the doors and put them on." The flight instructor said "it was not a problem" and took the controls and brought the helicopter to a low hover. The flight instructor made a 90 degree pedal turn to the left and slowly began to approach the hangar while hovering with the skids just above the ground. The owner further stated that the helicopter was inside the hangar when he felt a slight updraft and the main rotor system impacted the top structure of the hangar destroying all three main rotor blades. The hangar sustained substantial damage, and the owner's automobile, which was parked inside the hangar, was also damaged by flying debris from the helicopter. The flight instructor did not complete the Pilot/Operator Report (NTSB Forms 6120.1/2) provided to him by the investigator-in- charge. ## Aircraft - Registration: [N911BT](https://openairdocs.org/deregistered/N911BT-2012-06-12), registration cancelled 2012-06-12, S/N 1157, built 1978 (OpenAirDocs) - Reported make and model: ENSTROM 280C - Registry model: [Enstrom Helicopter 280C](https://openairdocs.org/model/enstrom-helicopter-280c) (registry code 3300505) (OpenAirDocs) - Registry engine: [Lycoming HI0-360 series](https://openairdocs.org/engine/lycoming-hi0-360-series) (registry code 41553, turbo-shaft) (OpenAirDocs) - Category: Helicopter - Serial number: 5711 - Airframe hours: 130 - Engines: LYCOMING HIO-360 205 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Registered owner: R.D. Huffman / Van L. Davidson - Airworthiness certificate: Standard, Normal - Last inspection: Annual, August 30, 1994, 130 hours before - Departed: EYQ - Airport: EYQ, Weiser Airpark, runway 27, 3,400 × 50 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; flight instructor, airline transport, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: helicopter, airplane; medical: class 1, valid medical--w/ waivers/lim; seat: right; flight hours: 8,200 total, 35 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 5 knots - Visibility: 7 statute miles - Lowest ceiling: 5,000 ft broken - Temperature: 81 °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 19950821026639A](https://openairdocs.org/incident/19950821026639A), Aug 21, 1995: Enstrm 280C, Houston, TX, Substantial damage. CFI hover taxied into hangar. Got an updraft off floor. Rose up. Rotors destroyed hitting hangar trusses. 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.