NTSB Identification: SEA89LA016.
The docket is stored on NTSB microfiche number 37719.
Accident occurred Friday, November 04, 1988 in KETCHIKAN, AK
Probable Cause Approval Date: 11/07/1989
Aircraft: BELL 214B-1, registration: N514RM
Injuries: 2 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.

OUTBD 5 FEET OF TOP SKIN FROM ONE MAIN ROTOR BLADE SEPARATED IN FLT. PLT EFFECTED LNDG WITH NO FURTHER DAMAGE. INVESTIGATION REVEALED EROSION OF LEADING EDGE PROTECTIVE STRIP ALLOWED AIRLOADS TO INTRUDE UNDER SKIN TO CAUSE DELAMINATION AND SEPARATION. SOOT TRAILS INDICATE EROSION/DEFECT PROBABLY PRESENT AT TIME OF LAST INSPECTION (1.2 HRS).

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

ROTOR SYSTEM,MAIN ROTOR BLADE SKIN..DELAMINATION

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

MAINTENANCE,INSPECTION..INADEQUATE..COMPANY MAINTENANCE PERSONNEL

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

AIRCRAFT PREFLIGHT..INADEQUATE..PILOT IN COMMAND


Contributing Factors

ROTOR SYSTEM,MAIN ROTOR BLADE SKIN..SEPARATION

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