MKC87LA040 · Beech A-36
Roscoe Brown Sales Beech A-36 · Accident: airframe, component or system failure on approach
From University of Illinois Willard Airport (CMI) to Corning, IA
Event
- NTSB case
- MKC87LA040
- 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 A-36
- Aircraft type
- Beechcraft A-36
- 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
- N7688N
- Operator
- Roscoe Brown Sales
- Onboard fatalities
- Unknown
- Route
- From University of Illinois Willard Airport (CMI), Champaign, ILTo Corning, IA
- 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
- Approach · VFR pattern final
- 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
- Airframe, component or system failure
- 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
- Tree(s)
- 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 › Clearance, not maintained
- Pilot in command › Visual lookout, not maintained
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE FLT HAD PROGRESSED NORMALLY FROM CHAMPAGNE, IL. THE IFR FLT PLAN WAS CANCELLED AT LAMONI VOR AND THE FLT PROCEEDED VFR. ON FINAL APPROACH TO RWY 17, APRX 1 MILE FROM THE RWY, THE ALTIMETER SUDDENLY UNWOUND AND THE ACFT STRUCK TREES. THE ALTIMETER HAD FUNCTIONED NORMALLY UP TO THAT POINT. POST ACCIDENT INSPECTION OF THE ALTIMETER SHOWED BINDING OF THE 100 FOOT NEEDLE AT THE TANG. ONLY SLOW MOVEMENT OF THE NEEDLE PRODUCED A SIGNIFICANT PROBLEM IN BINDING. THE TESTING OF THE ALTIMETER PRODUCED A SIMILAR MALFUNCTION TO THAT EXPERIENCED BY THE PLT DURING THE APPROACH. THE LIGHTS OF THE ARPT WERE FUNCTIONING PROPERLY DURING THE APPROACH.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record MKC87LA040
- Event ID
- 20001213X30134
- Case number
- MKC87LA040
- 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 1987-01-17.
- API snapshot SHA-256: 64da18263c80fffde4faacb03e1f22e52cf23f5758e3ede306b130fea35bfa2f; retrieved 2026-09-22T01:06:12.029Z.