ANC84LA181 · Cessna 152 II
Alaska Aviation School Cessna 152 II · Accident: total loss of engine power (mechanical failure) during initial climb
From KAHILTNA RIVER, AK to Merrill Field (MRI)
Event
- NTSB case
- ANC84LA181
- 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
Cessna 152 II
- Aircraft type
- Cessna 152
- 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
- N94505
- Operator
- Alaska Aviation School
- Onboard fatalities
- Unknown
- Route
- From KAHILTNA RIVER, AKTo Merrill Field (MRI), Anchorage, AK
- 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
- Initial climb
- 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
- Ignition system, magneto › Binding(mechanical)
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
FBO HAD BEEN EXPERIENCING DIFFICULTIES WITH SPARK PLUGS AND MAGNETOS IN THIS ACFT. THE PLT HAD FLOWN THIS ACFT BEFORE WITH RECURRENT ROUGH RUNNING AND DIMINISHED POWER SYMPTOMS. ENG BEGAN TO RUN ROUGH ON THIS FLT AND PLT LANDED ON A SAND BAR (MARKED FOR ACFT USE) TO CHECK IGNITION LEADS AND FUEL FOR CONTAMINATION. ON TAKEOFF, TOTAL POWER LOSS WAS EXPERIENCED AS THE ACFT REACHED ABOUT 2O FT AGL. PLT DITCHED THE ACFT IN THE RIVER. INVESTIGATION REVEALED THE MAGNETO BEARINGS WERE SEIZED. SERVICE BULLETIN RECOMMENDING REPLACEMENT OF BEARINGS HAD NOT BEEN COMPLIED WITH.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record ANC84LA181
- Event ID
- 20001214X40950
- Case number
- ANC84LA181
- 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 1984-09-17.
- API snapshot SHA-256: 6f2c0b5207e3cc7389a13196e1e31117446539c379b83cc72d60ece72ead6841; retrieved 2026-09-23T19:13:14.123Z.