CEN15LA204 · Grumman G 164A
Pro-Ag Service Grumman G 164A · Accident en route
From Pauls Valley Municipal Airport (PVJ) to Pauls Valley Municipal Airport (PVJ)
Event
- NTSB case
- CEN15LA204
- 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
Grumman G 164A
- Aircraft type
- Grumman G-164
- 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
- N7951
- Operator
- Pro-Ag Service
- Onboard fatalities
- Unknown
- Route
- From Pauls Valley Municipal Airport (PVJ), Pauls Valley, OKTo Pauls Valley Municipal Airport (PVJ), Pauls Valley, OK
- Aircraft age
- About 44 years (built 1971)
- 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 137: Agricultural
- 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
- 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 as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The commercial pilot had completed his second agricultural application flight of the day in the airplane. As he was returning to the departure airport, the engine experienced a loss of power. The pilot conducted a forced landing to a field, and the airplane subsequently nosed over and came to rest inverted.
An examination of the airframe and engine did not reveal any preimpact anomalies that would have precluded normal operation. The weather conditions at the time of the accident were conducive to serious icing only at glide power; the engine was likely operating at cruise power at the time of the power loss. The reason for the loss of engine power could not be determined.
Probable cause
The loss of engine power for reasons that could not be determined because a postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN15LA204
- Event ID
- 20150420X13730
- Case number
- CEN15LA204
- 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: ec1379971747e944dc0ea92944ce2f619084e873ceab05255a42fb9fb486293e; retrieved 2026-09-16T02:14:33.056Z.