# NTSB CHI84IA155: Swearingen SA226TC, N163MA, Milwaukee, WI, April 16, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: April 16, 1984, 17:57 local (23:57 UTC)
- Place: Milwaukee, WI
- Coordinates: 43.05093, -87.890541 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.0509&lon=-87.8905&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 10 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12447
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84IA155
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12447/pdf
- Page: https://openairdocs.org/ntsb/CHI84IA155

## Sequence of events

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

- Airframe/component/system failure/malfunction, descent
  - door,landing gear - binding(mechanical) (cause)
  - maintenance,lubrication - inadequate, company maintenance personnel (cause)
  - landing gear,main gear - movement restricted (cause)
- In flight collision with terrain/water, landing - flare/touchdown
  - wheels up landing - performed, pilot in command

## Analysis

A GEAR UP LANDING WAS PERFORMED AFTER THE CREW WAS UNABLE TO EXTEND THE RGT MAIN GEAR THRU NORMAL & EMERG PROCEDURES. AN EXAM OF THE ACFT DISCLOSED THE RGT MAIN GEAR DOOR AFT HINGE BOLT WAS SLIGHTLY BENT & DIFFICULT TO ROTATE IN ITS BUSHING. THE BUSHING & BOLT WERE DRY & HAD NOT BEEN LUBRICATED RECENTLY. THE HYDRAULIC CYLINDER WAS NOT CAPABLE OF SUPPLYING ENOUGH PRESSURE TO OVERCOME THE BINDING DOOR. THE BUSHING HAD NOT RECENTLY BEEN INSPECTED OR LUBRICATED BY MAINTENANCE PERSONNEL BECAUSE OF ITS LOCATION BEING DIFFICULT TO ACCESS.

## Aircraft

- Registration: [N163MA](https://openairdocs.org/deregistered/N163MA-2000-12-01), registration cancelled 2000-12-01, S/N TC236 (OpenAirDocs)
- Reported make and model: SWEARINGEN SA226TC
- Registry model: [Swearingen SA226TC](https://openairdocs.org/model/swearingen-sa226tc) (registry code 8780404) (OpenAirDocs)
- Category: Airplane
- Serial number: TC236
- Airframe hours: 13115
- Engines: AIRESEARCH TPE 331 840 horsepower turbo prop
- Damage: Minor damage
- Flight: Part 135
- Operator: Midstate Airlines, Inc.
- Registered owner: Midstate Airlines, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Continuous airworthiness, April 4, 1984, 61 hours before
- Departed: IND, INDIANAPOLIS, IN
- Destination: MKE, MILWAUKEE, WI
- Flight plan: IFR
- Airport: MKE, General Mitchell

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 7,243 total, 4,269 in this make and model, 208 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 25 knots, gusting 35
- Visibility: 8 statute miles
- Lowest ceiling: 2,300 ft overcast
- Temperature: 45 °F
- Altimeter: 29.00 inHg
- Observed at: MKE

## 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 19840416020729I](https://openairdocs.org/incident/19840416020729I), Apr 16, 1984: Swrngn SA226TC, Milwaukee, WI, Minor damage. Right main gear, no extension. Landed gear up. Gear door jammed, hinge bushing not lubricated. No access panel.

## Other investigations on N163MA (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 CHI85IA160](https://openairdocs.org/ntsb/CHI85IA160), Apr 10, 1985: Swearingen SA226TC (N163MA), Dayton, OH, incident, no 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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