NTSB Identification: ANC83FA092.
The docket is stored on NTSB microfiche number 20452.
Accident occurred Monday, June 06, 1983 in ANCHORAGE, AK
Aircraft: BELL B47G-2, registration: N6140C
Injuries: 1 Uninjured.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE HELICOPTER EXPERIENCED A TAIL ROTOR STRIKE DURING A HARD LANDING WITH A DOOR OPEN. ACCORDING TO THE STUDENT PILOT WHO IS A COMMERCIAL PILOT WORKING ON AN ADD-ON HELICOPTER RATING, THE LEFT COCKPIT DOOR UNLATCHED AND PARTIALLY OPENED ON THE DOWNWIND LEG FOR TOUCH-AND-GO PRACTICE LANDING. SHE CONTINUED THE PATTERN AND FINAL APPROACH WITH THE DOOR UNLATCHED WITHOUT FURTHER INCIDENT. SHE EXPECTED THE DOOR TO FULLY OPEN JUST PRIOR TO TOUCHDOWN WHICH IT DID. AS THE DOOR OPENED SHE APPLIED AFT CYCLIC AND FELT THE SKIDS TOUCH DOWN HARDER THAN NORMAL. THE HELICOPTER SLID FORWARD A SHORTDISTANCE WHILE REMAINING ALIGNED WITH THE RUNWAY. WHEN THE ACFT STOPPED THE PILOT LOOKED OUT AND NOTICED THE TAIL ROTOR HAD SEPARATED FROM THE HELICOPTER. INSPECTION OF THE DOOR LATCH SHOWED A WORN LATCH ASSEMBLY WHICH WAS DIFFICULT TO CLOSE PROPERLY. INSPECTION OF THE RUNWAY SURFACE REVEALED A TAILROTOR/GUARD STRIKE PRIOR TO ACFTS MAIN SKIDS TOUCHING THE GROUND.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

AIRSPEED..MISJUDGED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ALTITUDE..MISJUDGED..PILOT IN COMMAND


Contributing Factors

DOOR,EXTERIOR CREW..WORN


Contributing Factors

POWER ON LANDING..PERFORMED..PILOT IN COMMAND


Contributing Factors

MAINTENANCE..INADEQUATE..COMPANY MAINTENANCE PERSONNEL


Contributing Factors

DOOR,EXTERIOR CREW..OPEN

Index for Jun1983 | Index of months