# NTSB MKC84IA220: Beech C-45H, N492DM, Columbia, MO, July 18, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: July 17, 1984, 21:40 local (Jul 18, 1984, 02:40 UTC)
- Place: Columbia, MO
- Coordinates: 38.950355, -92.31974 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.9504&lon=-92.3197&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33576
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84IA220
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33576/pdf
- Page: https://openairdocs.org/ntsb/MKC84IA220

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, approach
  - landing gear - undetermined (cause)
- Gear collapsed, landing - roll

## Analysis

THE PLT REPORTED THAT HE WAS UNABLE TO GET A DOWN & LOCKED INDICATION ON THE MAIN LANDING GEAR WHEN ARRIVING AT COLUMBIA. HE STATED THAT HE WENT THRU THE EMERGENCY PROCEDURES & MADE TWO LANDING ATTEMPTS BUT FELT THE GEAR WAS ABOUT TO COLLAPSE & MADE GO-AROUNDS. ON THE THIRD ATTEMPT THE NOSE & MAIN LANDING GEAR COLLAPSED. INVESTIGATION FAILED TO REVEAL THE POINT OF INITIAL FAILURE.

## Aircraft

- Registration: [N492DM](https://openairdocs.org/deregistered/N492DM-1995-07-06), registration cancelled 1995-07-06, S/N 5210874 (OpenAirDocs)
- Reported make and model: BEECH C-45H
- Registry model: [Beech C-45H](https://openairdocs.org/model/beech-c-45h) (registry code 1151018) (OpenAirDocs)
- Category: Airplane
- Serial number: AF-804
- Airframe hours: 31670
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Minor damage
- Flight: Part 135
- Operator: Astro Airways Corp.
- Registered owner: T.E. Demint
- Airworthiness certificate: Standard, Normal
- Departed: OMA, OMAHA, NE
- Flight plan: IFR
- Airport: COU, Regional, runway 2, 6,500 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 4,700 total, 600 in this make and model, 4,000 as pilot in command, 45 in the last 90 days, 8 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 360° at 7 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 55 °F
- Altimeter: 29.00 inHg
- Observed at: COU

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19840717052149I](https://openairdocs.org/incident/19840717052149I), Jul 17, 1984: Beech C45H, Columbia, MO, Minor damage. Unable to obtain safe gear down indication. Nose gear and right main collapsed on landing. Cause obscured by damage

## Other investigations on N492DM (2)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB FTW93FA117](https://openairdocs.org/ntsb/FTW93FA117), Apr 6, 1993: Beech C-45H (N492DM), Mooringsport, LA, destroyed, 1 fatal. Probable cause: A TOTAL LOSS OF RIGHT ENGINE POWER, AND A PARTIAL LOSS OF LEFT ENGINE POWER, FOR UNDETERMINED REASONS.
- [NTSB MIA88LA057](https://openairdocs.org/ntsb/MIA88LA057), Dec 9, 1987: Beech C-45H (N492DM), Natchez, MS, substantial damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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