NYC82FGM12 · Aerospatiale SA 316B
Rocky MT Helicopter Aerospatiale SA 316B · Accident: total loss of engine power (mechanical failure) en route
From Crafton, PA to Crafton, PA
Event
- NTSB case
- NYC82FGM12
- 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
- Unknown
Aerospatiale SA 316B
- Aircraft type
- Aerospatiale SA-316
- Category
- Helicopter
- 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
- N8259
- Operator
- Rocky MT Helicopter
- Onboard fatalities
- Unknown
- Route
- From Crafton, PATo Crafton, PA
- 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
- Substantial
Cause areas
- Turbine assembly, shaft bearing › Other
- Turbine assembly, turbine wheel › Loose
Approximate · Estimated position: the centre of Crafton, PA, the place the record names. Not the accident site.
NTSB narrative
SHORTLY AFTER TAKEOFF THE PILOT HEARD A LOUD GRINDING NOISE AND FELT A VIBRATION EMANATING FROM THE REAR OF THE AIRCRAFT. IMMEDIATELY, THE NOSE YAWED TO THE LEFT AND THE ENGINE FAILED. THE PILOT ENTERED AUTORATION AND MADE A HARD LANDING. EXAMINATION OF THE ENGINE REVEALED THAT THE AFT BEARING SUPPORT HAD TWO BOLTS MISSING AND THE THIRD BOLT WAS SHEARED BUT STILL IN THE MOUNT HOLE. THIS ALLOWED THE AFT TURBINE SECTION TO COME IN CONTACT WITH THE TURBINE HOUSING. EXAMINATION OF THE FIRST STAGE AXIAL COMPRESSOR REVEALED BLADE NUMBER 4 TO HAVE A PIECE MISSING FROM THE ROOT SECTION. FOREIGN OBJECT DAMAGE WAS EVIDENT ON OTHER BLADES EXAMINED.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record NYC82FGM12
- Event ID
- 20020917X04038
- Case number
- NYC82FGM12
- 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: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1982-07-05.
- API snapshot SHA-256: 08ceb6e972df49fa32de7c69883320539cf711932023145d7b459e45c32bc1d3; retrieved 2026-09-24T02:34:08.904Z.