FTW82IA331 · Cessna 421B
J.D. Abrams Cessna 421B · Incident: total loss of engine power (mechanical failure) en route
From Austin Bergstrom International Airport (AUS) to Milwaukee, WI
Event
- NTSB case
- FTW82IA331
- 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
- Incident
- 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
Cessna 421B
- Aircraft type
- Cessna 421
- 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
- N1969J
- Operator
- J.D. Abrams
- Onboard fatalities
- Unknown
- Route
- From Austin Bergstrom International Airport (AUS), Austin, TXTo Milwaukee, WI
- 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 · descent
- 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
- Minor
Cause areas
- Accessory drive assembly › Loose
- Manufacturer › Maintenance, installation, improper
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
N1969J IS A 1974 CESSNA 421B MODIFIED BY A RILEY CONVERSION KIT. THE AIRCRAFT WAS DESCENDING THROUGH ABOUT 1900 FT MSL WHEN, WITHOUT PREVIOUS WARNING, IT YAWED LEFT. THE PILOT REPORTED THAT THE ACFT THEN IMMEDIATELY YAWED SEVERELY TO THE RIGHT AND BEGAN TO PRODUCE A HIGH-PITCHED WHINING NOISE. THE RIGHT ENGINE THEN EXPLODED. ENGINE DEBRIS PENETRATED THE CABIN WALL AND WINDOWS AND STRUCK THE PILOT CAUSING MINOR INJURIES. THE PILOT SECURED THE RT ENGINE, FEATHERED THE PROPELLER AND LANDED AT EL PASO WITHOUT FURTHER INCIDENT. EXAMINATION OF THE ENGINE REVEALED THAT THE POWER TURBINE WHEEL HAD DISINTEGRATED INFLIGHT. INTERNAL EXAMINATION REVEALED A BROKEN N2 ACCESSORY IDLER GEAR WHICH EXHIBITED A FATIGUE FRACTURE. A LOOSE NUT SECURING THE N2 ACCESSORY IDLER GEAR AND N2 SPEED DISC ALLOWED RELATIVE MOVEMENT AND WEAR OF THESE PARTS. FATIGUE OF THE IDLER GEAR CAUSED A LOSS OF DRIVE TO THE OVERSPEED GOVERNOR AND ALLOWED THE ENGINE TO OVERSPEED. THE MANUFACTURER IS REDESIGNING THE ASSEMBLY.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record FTW82IA331
- Event ID
- 20020917X03513
- Case number
- FTW82IA331
- 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: be03239c4af641c819fb261d18e0f3c2a63f78d86ac7bcea3522fac7e7b91f4d; retrieved 2026-09-22T02:56:05.941Z.