# NTSB MKC86LA013: Beech H-18, N936S, Osage Beach, MO, October 17, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 17, 1985, 14:15 local (19:15 UTC)
- Place: Osage Beach, MO
- Coordinates: 38.129547, -92.649421 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.1295&lon=-92.6494&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 6 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 34106
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC86LA013
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34106/pdf
- Page: https://openairdocs.org/ntsb/MKC86LA013

## Sequence of events

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

- In flight encounter with weather, approach - vfr pattern - final approach
  - weather condition - downdraft (contributing factor)
  - compensation for wind conditions - delayed, pilot in command (cause)
- Undershoot, approach - vfr pattern - final approach
  - terrain condition - ground
  - proper descent rate - not maintained, pilot in command (cause)

## Analysis

ON FIANL APPROACH TO LAND ON RWY 14 AT THE LINN CREEK/GRAND GLAIZE AIRPORT THE PLT BEGAN TO APPLY PRW TO THE TWO ENGINES TO ARREST THE DESCENT OF THE APPROACH. THE PLT FINALLY HAD FULL PWR APPLIED BUT THE ACFT IMPACTED. THE GROUND SHORT OF THE RWY. THE PLT STATED HE WAS SURE HE WAS COUGHT IN A DOWNDRAFT AND WAS UNABLE TO FLY OUT OF IT. WIND CONDITIONS FOR THE AIRPORT INDICATED ONLY A SLIGHT HEADWIND FOR THE FIANL APPROACH. WEATHER REPORTING STATIONS FOR THE SURROUNDING AREA INDICATED WINDS BLOWING GENERALLY FROM THE SOUTHWEST AT 9 TO 12 KNOTS. NO MECHANICAL DESCREPANCIES WAS NOTED BY THE PLT OR AS OBSERVED DURING AN INSPECTION OF THE ACFT.

## Aircraft

- Registration: [N936S](https://openairdocs.org/deregistered/N936S-1991-03-27), registration cancelled 1991-03-27, S/N BA640 (OpenAirDocs)
- Reported make and model: BEECH H-18
- Registry model: [Beech H-18](https://openairdocs.org/model/beech-h-18) (registry code 1151012) (OpenAirDocs)
- Category: Airplane
- Serial number: BA 640
- Airframe hours: 5477
- Engines: P&W R-985-AN-14B 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Associates Superior Con.
- Registered owner: Lanier & Lanier
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 10, 1985, 160 hours before
- Departed: 6A0, ACWORTH, GA
- Destination: K15, OSAGE BEACH, MO
- Flight plan: IFR
- Airport: K15, Linn Creek/Grand Glaise, runway 14, 3,205 × 60 ft, macadam

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 2,675 total, 310 in this make and model, 2,550 as pilot in command, 100 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 10 knots
- Visibility: 12 statute miles
- Lowest ceiling: 10,000 ft broken
- Temperature: 75 °F, dew point 57 °F
- Altimeter: 30.00 inHg
- Observed at: VIH, 43 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 19851017052569A](https://openairdocs.org/incident/19851017052569A), Oct 17, 1985: Beech H18, Osage Beach, MO, Destroyed. Landed short of runway after encountering a downdraft on final approach. Gear and one engine knocked off.

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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