MIA91FA172 · Cessna 411
Cessna 411 · Accident: loss of engine power during initial climb
Event
- NTSB case
- MIA91FA172
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Cessna 411
- Aircraft type
- Cessna 411
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N4940T
- Operator
- Conrad Ramaker
- Onboard fatalities
- Unknown
- Route
- From not recordedTo not recorded
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Initial climb
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Loss of engine power
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Stall
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Destroyed
Cause areas
- Pilot in command › Airspeed, not maintained
- Pilot in command › Emergency procedure, not followed
- Pilot in command › Propeller feathering, not performed
- Pilot in command › Stall, inadvertent
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
PILOT STATED LEFT ENGINE LOST POWER FOLLOWED BY THE RIGHT ENGINE. HE INITIATED A LEFT TURN BACK TO THE AIRPORT BUT DID NOT SHUTDOWN ENGINES IN ACCORDANCE WITH EMERGENCY PROCEDURES. THE ACFT YAWED LEFT AND FELL OFF ON THE LEFT WING AS IF IT HAD STALLED. HE REGAINED PARTIAL CONTROL AND AIMED FOR A STREET. ACFT HIT ROOF OF HOUSE WHILE IN RIGHT BANK AND THEN CARTWHEELED ACROSS THE STREET. LEFT ENGINE WAS FOUND TO HAVE SEVERE DETONATION DAMAGE AND THE TURBOCHARGER WASTE GATE DOOR WAS MISSING ANTIVIBRATION SPRING. THE PIN CONNECTING THE DOOR AND ACTUATOR WAS FAILED. EVIDENCE INDICATED PIN HAD FAILED PRIOR TO ACCIDENT FLIGHT. SOOT INSIDE LEFT WASTEGATE INDICATED DOOR HAD BEEN FULLY CLOSED FOR SOMETIME. NO EVIDENCE TO INDICATE FAILURE OR MALFUNCTION OF THE RIGHT ENGINE WAS FOUND AND RIGHT PROPELLER SHOWED DAMAGE INDICATIVE OF ROTATION UNDER POWER AT GROUND IMPACT.
Probable cause
THE PILOT IN COMMANDS FAILURE TO FOLLOW EMERGENCY PROCEDURES AND HIS FAILURE TO MAINTAIN AIRSPEED FOLLOWING LOSS OF POWER IN ONE ENGINE RESULTING IN AN INADVERTENT STALL AND THE INFLIGHT LOSS OF CONTROL WITH SUBSEQUENT INFLIGHT COLLISION WITH AN OBJECT AND THE TERRAIN DURING AN UNCONTROLLED DESCENT.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record MIA91FA172
- Event ID
- 20001212X17336
- Case number
- MIA91FA172
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1991-06-28.
- API snapshot SHA-256: cf0d6083603ea190ac91ff9065b698212cff1e9383f857241381aba5e148cf73; retrieved 2026-09-21T15:24:56.365Z.