NTSB MIA92LA188 — 1992-09-21 · ORLANDO, Florida, United States

N777BK has since been reassigned. It is now registered to a different aircraft (CESSNA 680, built 2008), which was not involved in this event.

Aircraft involved

N777BK Cessna 210L None

Probable cause & findings

FAILURE OF THE RIGHT MAIN LANDING GEAR ACTUATOR DUE TO OVERSTRESS FOR UNDETERMINED REASONS WHICH RESULTED IN LOSS OF ALL LANDING GEAR SYSTEM HYDRAULIC FLUID WHICH IN TURN RESULTED IN THE PILOT BEING UNABLE TO EXTEND AND LOCK THE LANDING GEAR.

Factual narrative

FLIGHT WAS UNABLE TO GET SAFE INDICATION FOR LANDING GEAR EXTENDED WHILE APPROACHING DESTINATION AIRPORT. FLIGHT RETURNED TO DEPARTURE AIRPORT. AFTER ACCOMPLISHING EMERGENCY PROCEDURES FOR GEAR EXTENSION, GEAR SAFE INDICATION WAS STILL NOT OBTAINED. PILOT DETERMINED ALL HYDRAULIC FLUID HAD BEEN LOST. FLIGHT WAS LANDED WITH THE NOSE GEAR LOCKED AND THE MAIN GEARS PARTIALLY EXTENDED. POSTLANDING EXAMINATION REVEALED RIGHT MAIN GEAR HYDRAULIC ACTUATOR HAD FAILED DUE TO OVERSTRESS ALONG METAL GRAIN BOUNDARIES AND AT AREA OF LOW WALL THICKNESS. ALL HYDRAULIC SYSTEM PRESSURE WERE FOUND TO BE NORMAL AND NO OTHER LANDING GEAR SYSTEM FAILURES WERE FOUND. AFTER FAILURE OF THE GEAR ACTUATOR ALL NORMAL AND EMERGENCY SYSTEM FLUID WAS LOST THROUGH THE ACTUATOR. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1992_MIA92LA188.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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