19990630007959A

Accident · Substantial damage

FAA accident report · Doug MD500E · Oklahoma City, OK · June 30, 1999

Date
June 30, 1999 · 23:30 local
Place
Oklahoma City, OK
Airport
Downtown Airpark Airport
Phase of flight
Autorot Descent (Rotorcraft)
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N686F
NTSB investigation
NTSBFTW99TA183
Reported as
Doug MD500E
Reported engine
Allison 250C20B
People aboard
2
Fatal injuries
0
Pilot’s flight hours
400 total130 in this make and model105 in the last 90 days

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(Tty) Oklahoma City police department 1995 Mcdonnell Douglas ME-500E helicopter crashed in the grass adjacent to rwy 16, the tail rotor struck the ground, and the helicopter crashed and rolled over. Other circumstances are unknown. (.19) on June 30, 1999, at 2330 central daylight time, a Mcdonnell Douglas 500-E helicopter, N686F, owned and operated by the Oklahoma City police department, was substantially damaged during a night landing at the Downtown Airpark Airport, Oklahoma City, OK. The private pilot and crewmember were not injured, and the passenger received minor injuries. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 code of federal regulations (CFR) part 91 public use local flight. The flight departed the Downtown airpark, about 30 minutes prior to the accident. According to preliminary information, during a practice autorotation, the pilot did not perform a power recovery, and the helicopter's tail rotor struck the ground. As the pilot attempted to level the helicopter, it touched down "hard." The helicopter came to rest on its right side. The operator reported that an examination of the helicopter revealed the tail boom p artially separated about three feet from its fuselage attaching point. The main drive shaft was damaged, the tail rotor drive shaft was separated at its aft flex coupling, and the right skid was separated. (.4)during a night practice autorotation, after reapplying power, the pilot flared the helicopter too low, and the tailboom contacted the ground. Tail rotor control was lost, and the helicopter came to rest on its right side. (-23)during night autorotation simulation, the tail rotor struck the ground. The pilot attempted to level out, but the aircraft impacted the ground separating the RH skid. The aircraft came to rest on its right side. This is a public use aircraft. No further action required.

As the FAA filed it

(TTY) OKLAHOMA CITY POLICE DEPARTMENT 1995 MCDONNELL DOUGLAS ME-500E HELICOPTER CRASHED IN THE GRASS ADJACENT TO RWY 16, THE TAIL ROTOR STRUCK THE GROUND, AND THE HELICOPTER CRASHED AND ROLLED OVER. OTHER CIRCUMSTANCES ARE UNKNOWN. (.19) ON JUNE 30, 1999, AT 2330 CENTRAL DAYLIGHT TIME, A MCDONNELL DOUGLAS 500-E HELICOPTER, N686F, OWNED AND OPERATED BY THE OKLAHOMA CITY POLICE DEPARTMENT, WAS SUBSTANTIALLY DAMAGED DURING A NIGHT LANDING AT THE DOWNTOWN AIRPARK AIRPORT, OKLAHOMA CITY, OK. THE PRIVATE PILOT AND CREWMEMBER WERE NOT INJURED, AND THE PASSENGER RECEIVED MINOR INJURIES. VISUAL METEOROLOGICAL CONDITIONS PREVAILED, AND A FLIGHT PLAN WAS NOT FILED FOR THE 14 CODE OF FEDERAL REGULATIONS (CFR) PART 91 PUBLIC USE LOCAL FLIGHT. THE FLIGHT DEPARTED THE DOWNTOWN AIRPARK, ABOUT 30 MINUTES PRIOR TO THE ACCIDENT. ACCORDING TO PRELIMINARY INFORMATION, DURING A PRACTICE AUTOROTATION, THE PILOT DID NOT PERFORM A POWER RECOVERY, AND THE HELICOPTER'S TAIL ROTOR STRUCK THE GROUND. AS THE PILOT ATTEMPTED TO LEVEL THE HELICOPTER, IT TOUCHED DOWN "HARD." THE HELICOPTER CAME TO REST ON ITS RIGHT SIDE. THE OPERATOR REPORTED THAT AN EXAMINATION OF THE HELICOPTER REVEALED THE TAIL BOOM P ARTIALLY SEPARATED ABOUT THREE FEET FROM ITS FUSELAGE ATTACHING POINT. THE MAIN DRIVE SHAFT WAS DAMAGED, THE TAIL ROTOR DRIVE SHAFT WAS SEPARATED AT ITS AFT FLEX COUPLING, AND THE RIGHT SKID WAS SEPARATED. (.4)DURING A NIGHT PRACTICE AUTOROTATION, AFTER REAPPLYING POWER, THE PILOT FLARED THE HELICOPTER TOO LOW, AND THE TAILBOOM CONTACTED THE GROUND. TAIL ROTOR CONTROL WAS LOST, AND THE HELICOPTER CAME TO REST ON ITS RIGHT SIDE. (-23)DURING NIGHT AUTOROTATION SIMULATION, THE TAIL ROTOR STRUCK THE GROUND. THE PILOT ATTEMPTED TO LEVEL OUT, BUT THE AIRCRAFT IMPACTED THE GROUND SEPARATING THE RH SKID. THE AIRCRAFT CAME TO REST ON ITS RIGHT SIDE. THIS IS A PUBLIC USE AIRCRAFT. NO FURTHER ACTION REQUIRED.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.