# NTSB MKC87IA007: Swearingen SA-226-TC, N251AM, Springfield, MO, October 17, 1986

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: October 16, 1986, 21:18 local (Oct 17, 1986, 02:18 UTC)
- Place: Springfield, MO
- Location: 37.2457° N, 93.3886° W: Placed by OpenAirDocs at SPRINGFIELD-BRANSON NTL (SGF), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.2457&lon=-93.3886&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 13 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 34304
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC87IA007
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34304/pdf
- Page: https://openairdocs.org/ntsb/MKC87IA007

## 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,normal retraction/extension assembly - jammed (cause)
  - gear extension - not possible, pilot in command (cause)
- In flight collision with terrain/water, landing - flare/touchdown
  - wheels up landing - performed, pilot in command (contributing factor)

## Analysis

DURING THE APPROACH, THE RIGHT MAIN LANDING GEAR WOULD NOT EXTEND BY NORMAL OR EMERGENCY MEANS. AIRPLANE WAS INTENTIONALLY LANDED WITH ALL LANDING GEAR RETRACTED. INSPECTION INDICATED GEAR DOORS PULLED CLOSED FARTHER THAN NORMAL DUE TO RIGHT MAIN LANDING GEAR ROLLER BEING STUCK BELOW THE ROLLER FOLLOWER ARM. GEARS DOORS WERE STUCK CLOSED WHICH IN TURN EFFECTIVELY LOCKED GEAR INSIDE GEAR DOORS.

## Aircraft

- Registration: N251AM (not matched to a registry record)
- Reported make and model: SWEARINGEN SA-226-TC
- Category: Airplane
- Serial number: TC-376
- Airframe hours: 12492
- Engines: GARRETT TPE-331-10UA 940 horsepower turbo prop
- Damage: Minor damage
- Flight: Part 135
- Registered owner: Air Midwest, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: AAIP, August 15, 1986, 151 hours before
- Departed: STL, ST.LOUIS, MO
- Destination: TBN, FT.LEONARD WOOD, MO
- Flight plan: IFR
- Airport: SGF, Regional, runway 19, 7,003 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 24; airline transport, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 3,466 in this make and model

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: 210° at 6 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 52 °F, dew point 46 °F
- Altimeter: 30.00 inHg
- Observed at: SGF

## 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 19861016072509I](https://openairdocs.org/incident/19861016072509I), Oct 16, 1986: Swrngn SA226TC, Springfield, MO, Minor damage. Right main gear failed to extend. Aircraft landed gear up. Torque tube roller follower found out of adjustment.

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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