DEN99LA043 · Beech 35-C33
Beech 35-C33 · Accident: in flight encounter with weather during initial climb
From Lake County Airport (LXV) to F61 · Pauls Valley, OK
Event
- NTSB case
- DEN99LA043
- 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 35-C33
- 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
- N977MC
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Lake County Airport (LXV)To F61 · Pauls Valley, OK
- 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
- In flight encounter with weather
- 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
- Pilot in command › In-flight planning/decision, improper
- Pilot in command › Planning/decision, improper
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot had called the airport (elevation 9,927 feet) and spoke with the local flight instructor/FAA accident prevention counselor several days before the accident. The flight instructor advised the pilot not to fly to the airport with a heavy load due to the reduction in an airplane's performance in high density altitude. On the day of the accident, the flight instructor observed the pilot depart on runway 34 with two passengers and baggage (estimated gross weight of 2,950 pounds). She said that normal departure on runway 34 is a left crosswind, due to rising terrain to the east northeast. The pilot reported the he leaned the airplane's engine for full available power, but he believes that he got into a down draft after takeoff. The airplane was found approximately 1,500 feet northeast of the departure end of the runway. The maximum gross weight of the airplane was 3,050 pounds. According to the airplane's Pilot's Operating Handbook & FAA approved Airplane Flight Manual, at 10,000 feet density altitude, the airplane was capable of climbing at 490 fpm at 90 knots indicated airspeed.
Probable cause
The pilot's in-flight decision to turn into rising terrain, and his decision to fly into and out of the airport in a heavy weight condition after the local flight instructor/FAA accident prevention counselor recommended that he should not. Factors were the high density altitude, and the rising terrain.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN99LA043
- Event ID
- 20001205X00154
- Case number
- DEN99LA043
- 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: 53b2a010929ad71b35312e395f656cc67fba18f6e7cafd63a6d5262661636700; retrieved 2026-09-22T15:46:49.668Z.