Accident · 1993-07-30

NTSB case LAX93LA308 · ROBINSON R-22 · Part 91

What the record says

Event date: 1993-07-30
Event type: Accident
Highest injury level: No injuries
Aircraft: ROBINSON R-22 (N549SM)
Operating rule: Part 91
Operator: HELICOPTER ADVENTURES INC. Operator named in NTSB report
Operated by (per NTSB report): HELICOPTER ADVENTURES, INC.

Probable cause

THE INSTRUCTOR'S IMPROPER SUPERVISION OF THE FLIGHT; THE DUAL STUDENT'S IMPROPER IN-FLIGHT DECISION TO FOLLOW ANOTHER HELICOPTER ON DEPARTURE AND THE DUAL STUDENTS DELAY IN CORRECTING THE INADVERTENT YAW. FACTORS RELATED TO THIS ACCIDENT WAS THE INADVERTENT ENCOUNTER WITH THE WAKE TURBULENCE FROM THE PRECEDING DEPARTING HELICOPTER; THE DUAL STUDENT'S IMPROPER USE OF THE THROTTLE AND THE DUAL STUDENTS FAILURE TO MAINTAIN ADEQUATE ROTOR RPM.

Source: NTSB case LAX93LA308

Flight crew

Flight-crew details for this event aren't in the NTSB database extract we hold (its coverage starts with 2008 events) — a gap in our data, not an absence of crew.

Facts as the NTSB records them — GroundCheck adds no judgement. Preliminary records may be revised as the investigation proceeds.

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