DEN91LA033 · Cessna 152
Cessna 152 · Accident: loss of engine power en route
From FTS · Fort Worth, TX to an unrecorded destination
Event
- NTSB case
- DEN91LA033
- 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 152
- Aircraft type
- Cessna 152
- 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
- N94330
- Operator
- Qualiflight Training
- Onboard fatalities
- Unknown
- Route
- From FTS · Fort Worth, TXTo 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
- En route · descent
- 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
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Fuel system, carburetor › Ice
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE INSTRUCTOR RETARDED THE THROTTLE AND ASKED THE PILOT TO DEMONSTRATE A SIMULATED FORCED LANDING. AFTER DEMONSTRATING THE PROCEDURE, THE PILOT APPLIED FULL THROTTLE BUT THE ENGINE DID NOT RESPOND. THE INSTRUCTOR ASSUMED CONTROL OF THE AIRPLANE, LANDED ON UNEVEN TERRAIN, AND THE AIRPLANE OVERTURNED. THE ENGINE WAS LATER TESTED AND FUNCTIONED NORMALLY. THE INSTRUCTOR AND PILOT LATER SAID CARBURETOR HEAT HAD NOT APPLIED PRIOR TO THE POWER REDUCTION, AND CARBURETOR ICE CAUSED THE POWER LOSS. THE ENGINE WAS LATER FUNCTIONALLY TESTED BY THE FAA COORDINATOR. IT RAN NORMALLY.
Probable cause
A POWER LOSS DUE TO CARBURETOR ICE RESULTING FROM THE FLIGHT INSTRUCTORS FAILURE TO USE CORRECT ENGINE MANAGEMENT PROCEDURES. A FACTOR WAS THE ROUGH TERRAIN IN WHICH THE FORCED LANDING WAS PERFORMED.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN91LA033
- Event ID
- 20001212X16309
- Case number
- DEN91LA033
- 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: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: cc178d9dcce264f95c6e23cff73f8f2fc6942b97a35d03358e84e2c843b1b270; retrieved 2026-09-23T04:54:30.091Z.