# NTSB NYC98GA093: McDonnell Douglas 500E, N551CP, Columbus, OH, April 13, 1998 - Type: NTSB accident investigation - Classification: Accident · No injuries · Final report - Date: April 13, 1998, 10:40 local (14:40 UTC) - Place: Columbus, OH - Coordinates: 40.090869, -82.979087 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.0909&lon=-82.9791&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report February 15, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 39475 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC98GA093 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39475/pdf - Page: https://openairdocs.org/ntsb/NYC98GA093 ## Probable cause loss of engine power for undetermined reason(s). Related factors were: lack of suitable terrain for an emergency landing; and high obstructions in the forced landing area. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, cruise - reason for occurrence undetermined (cause) - Forced landing, emergency descent/landing - autorotation - initiated - Hard landing, emergency landing - terrain condition - none suitable (contributing factor) - terrain condition - high obstruction(s) (contributing factor) - maneuver to avoid obstructions - performed ## Analysis After loss of engine power at about 700 feet above ground level, the pilot entered an autorotation to a street. To avoid wires during the autorotation, the pilot flared early, trading speed for altitude to avoid the wires. After passing over the wires, the helicopter began settling. The pilot increased collective, but the helicopter touched down hard. The main rotor system then flexed downward and severed the tail boom. Examination of the engine and fuel system revealed no anomaly. Also, an operational check of the engine was made, and it performed within operational specifications. ## Factual narrative On April 13, 1998, at 1040 eastern daylight time, a McDonnell Douglas 500E, N551CP, operated by the Columbus City Police Department, was substantially damaged during a forced landing to a city street in Columbus, Ohio. The certificated commercial pilot and two passengers were not injured. Visual meteorological conditions prevailed for the public use flight that originated from the Columbus City Heliport in Columbus, Ohio. A company flight plan was filed for the flight conducted under 14 CFR Part 91. In a written statement, the pilot stated he entered a straight-in autorotation to a street after hearing the engine-out horn sound. He also stated that on short final to the intended touchdown point, he identified wires crossing the helicopter's descent path. In an attempt to avoid the wires, he flared the helicopter, trading airspeed for altitude. Then after passing over the wires, the helicopter started to settle. The pilot increased collective and the helicopter touched down tailrotor first. The main-rotor system then flexed down, severing the tailboom causing substantial damage. The engine, an Allison 250C-203 was inspected in the presence of a FAA Representative. Engine continuity was established and no leaks were found with the engine's pneumatic system. A visual inspection of the engine compartment to include the firewall also revealed no anomalies. The fuel system was examined and no evidence of water or other contaminates where found. The helicopter was fueled from a tank at the Columbus Police Department's Heliport. Three other turbine helicopters received fuel from that same tank in the previous 24 hours, and no problems were reported. The helicopter was ground run for approximately 10 minutes, minus the rotor blades because of accident damage. The engine was started and taken to 103%. When the rotor RPM was reduced to 98% the auto-start engaged and the engine-out audio warning was heard. The manufacture ran the engine under load, and it operated to within operational specifications. Further testing was done on the fuel control, engine governor, and engine driven fuel pump. These accessories also where within the manufacture's performance specifications. ## Aircraft - Registration: N551CP (not matched to a registry record) - Reported make and model: McDonnell Douglas 500E - Category: Helicopter - Serial number: 0534E - Airframe hours: 1130 - Engines: Allison 250-C20 420 horsepower turbo shaft - Damage: Substantial damage - Flight: Public aircraft, Part 91 - Registered owner: Columbus Division Of Police - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 8, 1998, 30 hours before - Departed: NONE, POLICE HELIPORT, OH - Flight plan: Company VFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; commercial, flight instructor; instrument ratings: helicopter; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 7,000 total, 46 in this make and model, 6,876 as pilot in command, 39 in the last 90 days, 11 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 200° at 17 knots, gusting 21 - Visibility: 10 statute miles - Lowest ceiling: 2,500 ft overcast - Temperature: 52 °F, dew point 28 °F - Altimeter: 30.00 inHg - Observed at: KCM, 10 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 19980413006749A](https://openairdocs.org/incident/19980413006749A), Apr 13, 1998: Doug MD500E, Columbus, OH, Substantial damage. Helicopter crashed under unknown circumstances, Columbus, OH. (.4)after loss of engine power at about 700 feet above ground level, the pilot entered an… 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.