MIA97LA174 · Convair CV-240
Convair CV-240 · Accident: total loss of engine power (mechanical failure) en route
From Cyril E. King Airport (STT) to Luis Munoz Marin International Airport (SJU)
Event
- NTSB case
- MIA97LA174
- 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
Convair CV-240
- Aircraft type
- Convair CV-240
- 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
- N355T
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Cyril E. King Airport (STT), ST THOMASTo Luis Munoz Marin International Airport (SJU), PR
- 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 · cruise
- 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
- Total loss of engine power (mechanical failure)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Destroyed
Cause areas
- Engine assembly, bearing › Failure, total
- Engine assembly, master rod › Failure, total
Approximate · Estimated position: the centre of San Juan, the place the record names. Not the accident site.
NTSB narrative
The pilot stated that during cruise flight, the flight crew noticed that the left engine had high temperature and that its oil pressure started to fluctuate. A precautionary engine shutdown was performed. A short time later, the right engine started to fail, and the airplane would not maintain altitude. The left engine was restarted, but the flight crew could not maintain altitude. A forced landing was made on a beach; however, the airplane came to rest in 5 feet of water in the Atlantic Ocean. Examination of the left engine revealed a failure of the front master rod bearing. Examination of the right engine revealed a failure of the aft master rod.
Probable cause
failure of the aft master rod in the right engine, and failure of the front master rod bearing in the left engine, which resulted in a forced landing on a beach and a subsequent encounter with ocean water.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record MIA97LA174
- Event ID
- 20001208X07987
- Case number
- MIA97LA174
- 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: 08899ed3d333404305ce0397782c15deecdeb746dce3771ae407313bb52a7962; retrieved 2026-09-22T19:36:43.554Z.