NTSB Identification: CHI86LA134.
The docket is stored on NTSB microfiche number 31633.
Accident occurred Sunday, April 27, 1986 in MT CLEMENS, MI
Aircraft: Brantly Helicopter B-2B, registration: N2194U
Injuries: 2 Serious.

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

AFTER APRX 20 SUCCESSFUL TAKEOFFS & LANDINGS, THE ENG OF THE HELICOPTER LOST POWER AT ABOUT 300 FT AGL, DUE TO A #1 CONNECTING ROD FAILURE. DURING AN AUTOROTATION, THE HELICOPTER LANDED IN TREES & WAS DESTROYED. ALTHOUGH THE PILOT WAS INSTRUCTING A NEW STUDENT PILOT, HE HELD NO FAA FLYING CERTIFICATE. THE LAST ANNUAL INSPECTION OF THE HELICOPTER WAS DATED 12/2/75. A TEARDOWN OF THE ENG REVEALED DISCREPANCIES IN THE INSTALLATION OF THE #2, #3 & #4 ROD CAPS. DUE TO THE DAMAGE, PROPER INSTALLATION OF THE #1 ROD CAP COULD NOT BE VERIFIED.

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

MAINTENANCE,INSPECTION..IMPROPER..OTHER MAINTENANCE PERSONNEL

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

ENGINE ASSEMBLY,CONNECTING ROD..FAILURE,TOTAL



Contributing Factors

TERRAIN CONDITION..NONE SUITABLE


Contributing Factors

MAINTENANCE,ANNUAL INSPECTION..NOT PERFORMED..COMPANY/OPERATOR MANAGEMENT


Contributing Factors

PROCEDURES/DIRECTIVES..NOT FOLLOWED..PILOT IN COMMAND


Contributing Factors

OBJECT..TREE(S)


Contributing Factors

QUALIFICATION..PILOT IN COMMAND

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