CHI98LA180 · Beech F35
Beech F35 · Accident: loss of engine power en route
From HDE · Pueblo, CO to Hastings Municipal Airport (HSI)
Event
- NTSB case
- CHI98LA180
- 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
Beech F35
- Aircraft type
- Beechcraft 35
- 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
- N1AG
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From HDE · Pueblo, COTo Hastings Municipal Airport (HSI), HASTING, NE
- 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
- Loss of engine power
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Stall
- 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
- Pilot in command › Stall, inadvertent
- Pilot in command › Unsuitable terrain or takeoff/landing/taxi area, selected
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot reported that while en route at 9,500 feet msl, the engine quit and attempts to restart it were unsuccessful. The pilot picked out a field and maneuvered the airplane to a 'low key' position abeam his landing point at 1,200 feet agl. He reported extending the landing gear after low key, but when he was at the 90 degree position, he noticed a tower in the field. To avoid the tower, the pilot withheld flap extension and 'zoomed' the aircraft to clear the guy wires supporting the tower. The pilot reported that the airplane stalled at approximately 20 feet above ground level at 65 miles per hour. The engine teardown and inspection revealed broken camshaft gear drive attachment bolts. A metallurgical examination indicated that the failure was due to fatigue. The metallurgist reported the evidence of fatigue failure was exhibited by the beach marks and ratchet marks which suggested that the bolts were under torqued, thus leading to fatigue failure.
Probable cause
the pilot selected a field with unsuitable terrain and stalled the airplane. Additional factors were the tower in the field, and engine failure due to the improper torque applied to camshaft bolts by other maintenance personnel.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI98LA180
- Event ID
- 20001211X10032
- Case number
- CHI98LA180
- 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: 4c2ceef04882fb3b409ce7dabf76e66c034c007844445b05a49791e739a12e49; retrieved 2026-09-21T20:50:07.336Z.