CEN18LA335 · Cessna R172E
Cessna R172E · Accident during takeoff
From USAF Academy Airfield (AFF) to USAF Academy Airfield (AFF)
Event
- NTSB case
- CEN18LA335
- 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
- Unknown
- 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 R172E
- Aircraft type
- Cessna 172
- 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
- N146AC
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From USAF Academy Airfield (AFF), Colorado Springs, COTo USAF Academy Airfield (AFF), Colorado Springs, CO
- Aircraft age
- About 51 years (built 1967)
- 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
- Takeoff
- Defining eventThe 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
- Unknown or undetermined
- 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
- Not determined › Not determined
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The flight instructor reported that the student pilot was flying the airplane during the first takeoff of an instructional flight. The engine sounded normal and was operating properly with a fuel flow of about 14 gallons per hour and between 2,800 to 2,900 rpm. The instructor stated that, during the takeoff roll, the student rotated the airplane about 60 mph. Initially, the pitch was high, but then the student lowered the airplane's nose to the horizon. Subsequently, the airplane reached about 100 ft above ground level but then stopped climbing, and the airspeed began decreasing. The instructor reported that the fuel flow and rpm were still normal.
The instructor stated that he took the flight controls, lowered the flaps to 10°, and lowered the airplane's nose to hold 55 to 60 mph, "hoping that the ground effect would enable a speed increase." He turned the airplane right to avoid a tree line and conducted a forced landing in a field. The airplane landed on its main wheels, but the nose landing gear impacted rough terrain, and the airplane nosed over, which resulted in substantial damage to the wings and fuselage.
Postaccident examination of the airframe, engine, and propeller governor revealed no evidence of any preaccident mechanical malfunctions or failures that would have precluded normal operation. Therefore, the reason for the airplane's failure to maintain a climb could not be determined.
Probable cause
The airplane’s failure to maintain a climb after takeoff, which resulted in a forced landing on unsuitable terrain; the reason for the airplane’s failure to climb could not be determined based on the available evidence.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN18LA335
- Event ID
- 20180816X93831
- Case number
- CEN18LA335
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
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, coordinates. 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: c3ba86dceb8c61bfb165879e95f875a6ffcb4d98618c0f6dacb95c6f7bf6b8cd; retrieved 2026-09-16T08:06:32.591Z.