ERA20LA045 · Yakovlev YAK 52
Yakovlev YAK 52 · Accident: loss of engine power (total) en route
From Waycross Ware County Airport (AYS) to Kaolin Field (OKZ)
Event
- NTSB case
- ERA20LA045
- 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
Yakovlev YAK 52
- Aircraft type
- Yakovlev YAK-52
- 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
- N52CY
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Waycross Ware County Airport (AYS), Waycross, GATo Kaolin Field (OKZ), Sandersville, GA
- Aircraft age
- About 31 years (built 1988)
- 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
- 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
- Loss of engine power (total)
- 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
- Aircraft › Aircraft power plant
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
During the cruise portion of a repositioning cross-country flight, the engine experienced a catastrophic failure and a total loss of power. The flight instructor maneuvered the airplane for a forced landing in an open field, and about 500 ft above ground level, he lowered the landing gear, which significantly increased the airplane's rate of descent and reduced its airspeed. The airplane touched down in the field and nosed over, resulting in substantial damage to the fuselage, empennage, and wings. Internal examination of the engine revealed that the No. 5 cylinder's exhaust valve seat had dropped into the cylinder and likely fractured into several pieces, as metal fragments were observed in the cylinder. The failure of the exhaust valve led to the total loss of engine power.
Probable cause
A total loss of engine power due to the failure of the No. 5 cylinder exhaust valve, which resulted in an forced off-airport landing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ERA20LA045
- Event ID
- 20191201X92833
- Case number
- ERA20LA045
- 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. 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: 134a3badb2670363333d8ce518b31bce4fec5afde3b0b1bbd2a8246d6a66bf5b; retrieved 2026-09-16T10:42:47.073Z.