NTSB CAROL · Event
Event MIA92LA031
Aircraft involved
Probable cause & findings
THE PILOT-IN-COMMAND'S IMPROPER USE OF COLLECTIVE CONTROL AND THROTTLE DURING RECOVERY FROM AN AUTOROTATION WHICH RESULTED IN LOSS OF ROTOR RPM AND A SUBSEQUENT HARD LANDING.
Factual narrative
PILOT INITIATED PRACTICE AUTOROTATION. AT 500 FEET ALTITUDE RECOVERY WAS ATTEMPTED BY INCREASING COLLECTIVE AND INCREASING THROTTLE. LOW ROTOR SPEED WARNING WAS HEARD AND ENGINE DID NOT ACCELERATE. PILOT LOWERED COLLECTIVE AND CONTINUED AUTOROTATION TO THE GROUND AT WHICH TIME A HARD LANDING WAS MADE. POSTCRASH EXAMINATION OF THE AIRCRAFT BY FAA INSPECTORS REVEALED NO EVIDENCE OF FAILURE OR MALFUNCTION OF THE AIRCRAFT ENGINE. THE ENGINE WAS OPERATED AFTER THE ACCIDENT WITH NO EVIDENCE OF FAILURE. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1991_MIA92LA031.txt.
Findings + structured fields enriched from FAA avall.mdb.
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