NTSB Identification: NYC83LA150.
The docket is stored on NTSB microfiche number 20885.
Accident occurred Thursday, June 23, 1983 in NANTUCKET, MA
Aircraft: MBB BO-105, registration: N2908U
Injuries: 1 Minor,1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE HELICOPTER MADE A HARD LANDING DURING AN ABORTED TAKEOFF FOLLOWING A MEDICAL EVACUATION DEMONSTRATION AT NANTUCKET. AFTER THE PRESENTATION THE ACFT WAS CHANGED FROM A 2 LITTER CONFIGURATION. THE PILOT NOTED THAT THE CYCLIC RETENTION CAP WAS ON THE CYCLIC STICK MOUNTING POINT BUT DID NOT KNOW WHO PUT IT THERE. THE RACK WAS THEN PUT IN PLACE AND HELD THERE BY ONE OF THE RETAINING CLIPS AND THE STRETCHER MOUNTED IN POSTION. CONTROLS WERE CHECKED FOR FREEDOM OF MOVEMENT AND THE FLIGHT TOOK OFF. IN THE INITIAL CLIMB, CYCLIC WAS MOVED FORWARD WITH NO PROBLEM BUT LATER IN THE CLIMB THE NOSE CONTINUED UP AND FORWARD CYCLIC WAS ATTEMPTED BUT WOULD NOT GO FORWARD OF THE POSITION IT WAS IN. THE PILOT LOWERED COLLECTIVE AND DESCENDED HITTING THE GROUND TAIL LOW. THE ACFT BOUNCED AND COLLECTIVE WAS HELD DOWN UNTIL THE ACFT TWISTED TO A STOP. INVESTIGATION REVEALED THAT CONTROL INTERFERENCE BY A CYCLIC STICK RETENTION KNOB, INADVERTENTLY INSTALLED, PREVENTED FORWARD CYCLIC MOVEMENT BECAUSE OF CONTACT WITH THE LEFT LITTER RACK.

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

AIRCRAFT PREFLIGHT..INADEQUATE..PILOT IN COMMAND

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

ROTORCRAFT FLIGHT CONTROL,CYCLIC CONTROL..JAMMED

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

CYCLIC..IMPROPER..OTHER PERSON

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