# NTSB DEN85LA199: Beech 58P, N6039S, Buena Vista, CO, July 25, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 25, 1985, 10:00 local (16:00 UTC)
- Place: Buena Vista, CO
- Coordinates: 38.829715, -106.140342 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.8297&lon=-106.1403&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16733
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN85LA199
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16733/pdf
- Page: https://openairdocs.org/ntsb/DEN85LA199

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - induction air control/system - blocked(partial) (cause)
  - induction air control/system - inoperative (cause)
  - maintenance,compliance with ad - not performed, other maintenance personnel (contributing factor)
  - maintenance,alignment - improper, other maintenance personnel (cause)
- Loss of engine power(partial) - mech failure/malf, takeoff - initial climb
- Forced landing, descent - emergency
  - directional control - not maintained, pilot in command (cause)
  - emergency procedure - improper, pilot in command (cause)
- In flight collision with terrain/water, landing
  - wing,wingtip - separation
  - propeller system/accessories,blade - bent
  - fuselage,skin - buckled

## Analysis

THE LEFT ENGINE FAILED DURING TAKEOFF AT AN ALTITUDE OF ABOUT 40 FT AGL. DURING THE FORCED LANDING, THE PLT USED INCORRECT EMERGENCY PROCEDURES AND FAILED TO MAINTAIN LATERAL AND DIRECTIONAL CONTROL OF THE ACFT. INSPECTION OF THE ACFT REVEALED A DISINTEGRATED LEFT ENG INDUCTION AIR FILTER HAD BLOCKED THE AIR BOX OUTLET, A MISALIGNED AIR BOX PREVENTED ACTUATION OF THE ALTERNATE AIR SOURCE DOOR AND A BOGUS GASKET HAD BEEN INSTALLED BETWEEN THE AIR BOX FLANGE ATTACHMENT AND THE FIREWALL.

## Aircraft

- Registration: [N6039S](https://openairdocs.org/deregistered/N6039S-1991-05-01), registration cancelled 1991-05-01, S/N TJ38 (OpenAirDocs)
- Reported make and model: Beech 58P
- Registry model: [Beech 58P](https://openairdocs.org/model/beech-58p) (registry code 1152744) (OpenAirDocs)
- Category: Airplane
- Serial number: TJ-38
- Airframe hours: 1367
- Engines: CONTINENTAL TSIO-520-L1B 325 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Charles Howard
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 11, 1984, 600 hours before
- Destination: DWH, HOUSTON, TX
- Airport: 7V1, Buena Vista Municipal, runway 33, 9,000 × 150 ft, macadam

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; commercial; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 3,470 total, 59 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 6 knots
- Visibility: 50 statute miles
- Lowest ceiling: 3,000 ft broken
- Temperature: 64 °F, dew point 73 °F
- Altimeter: 30.00 inHg
- Observed at: ALS, 90 nm away

## FAA reports on this event (1)

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

- [Accident 19850725033759A](https://openairdocs.org/incident/19850725033759A), Jul 25, 1985: Beech 58P, Buena Vista, CO, Substantial damage. Did not comply with AD to replace fouled induction air filter, caused power loss. Did not shut down correct engine.

## Other investigations on N6039S (1)

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 IAD77FKW18](https://openairdocs.org/ntsb/IAD77FKW18), May 2, 1977: Beech 58P (N6039S), Knoxville, TN, 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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