ERA12LA474 · Piper PA-25-235
Simmons Aviation Services Piper PA-25-235 · Accident: loss of engine power (total) en route
From Westerly State Airport (WST) to Westerly State Airport (WST)
Event
- NTSB case
- ERA12LA474
- 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
Piper PA-25-235
- Aircraft type
- Piper PA-25
- 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
- N7313Z
- Operator
- Simmons Aviation Services
- Onboard fatalities
- Unknown
- Route
- From Westerly State Airport (WST), Westerly, RITo Westerly State Airport (WST), Westerly, RI
- 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
- 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
- Not determined › Not determined
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
About 12 minutes into a local banner towing flight, while flying 650 feet above the ocean, the airplane’s engine began running roughly. The pilot responded by increasing the throttle to full, richening the mixture, and applying carburetor heat, all to no avail. Shortly thereafter, the engine lost power completely, so the pilot performed a forced landing to the ocean and was later rescued by civilian boaters. The airplane was recovered from the ocean more than 1 week after the accident. The pilot/operator was able to perform a cursory inspection of the engine at the time, but no definitive cause for the loss of power was identified. Due to the salt water-damaged state of the engine, no further detailed examination could be completed. At the time of the accident, the engine had accumulated nearly 2,300 hours since its most recent overhaul and 150 hours since its most recent annual inspection. Weather conditions at an airport 6 miles from the accident location were conducive to the formation of serious carburetor ice at glide power settings.
Probable cause
A total loss of engine power for reasons that could not be determined due to the postaccident salt water-damaged state of the engine.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ERA12LA474
- Event ID
- 20120724X74125
- Case number
- ERA12LA474
- 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: 5091cbdef6bb646fbcc1ba83e779acfe239b9176f8cb0d3051fd1a15d4049d50; retrieved 2026-09-15T19:04:27.040Z.