# NTSB CHI84IA111: Swearingen SA-26AT, N175P, Indianapolis, IN, February 16, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: February 15, 1984, 19:41 local (Feb 16, 1984, 01:41 UTC)
- Place: Indianapolis, IN
- Location: 39.7173° N, 86.2946° W: Placed by OpenAirDocs at INDIANAPOLIS INTL (IND), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.7173&lon=-86.2946&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12443
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84IA111
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12443/pdf
- Page: https://openairdocs.org/ntsb/CHI84IA111

## Sequence of events

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

- Main gear collapsed, landing
  - landing gear,main gear attachment - fatigue (cause)
- Loss of control - on ground/water, landing - roll
  - directional control - not possible
  - ground loop/swerve - uncontrolled

## Analysis

THE PLT WAS ON A LOCAL FLT TO CHECK THE AILERON RIGGING AFTER MAINTENANCE HAD BEEN PERFORMED ON IT. AFTER TAKING OFF, HE REMAINED IN THE TRAFFIC PATTERN. ON DOWNWIND, AFTER EXTENDING THE LANDING GEAR, HE NOTED AN UNSAFE RIGHT MAIN GEAR INDICATION. THE PLT RECYCLED THE GEAR, CHECKED THE CIRCUIT BREAKERS & USED THE EMERGENCY EXTENSION SYSTEM. SUBSEQUENTLY, DURING A LANDING, THE RIGHT GEAR COLLAPSED & THE ACFT SWERVED TO THE RIGHT & RECEIVED MINOR DAMAGE. AN EXAM REVEALDED THAT THE SUPPORT BRACKET FOR THE RIGHT MAIN GEAR SUPPORT ASSEMBLY (P/N 50-820107) CONTAINED AN OLD FATIGUE CRACK. AFTER THE BRACKET FAILED, THE GEAR ACTUATOR SEPARATED FROM THE BRACKET.

## Aircraft

- Registration: N175P (not matched to a registry record)
- Reported make and model: SWEARINGEN SA-26AT
- Category: Airplane
- Serial number: T26-135
- Airframe hours: 5400
- Engines: GARRETT TPE331-1-151G 605 horsepower turbo prop
- Damage: Minor damage
- Flight: Part 91
- Registered owner: Jack L. Rhodes Aircraft Sales
- Departed: INDIANAPOLIS, IN
- Airport: IND, Indianapilis Inter,, runway 13, 7,600 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 34; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 4,250 total, 50 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 8° at 10 knots
- Visibility: 20 statute miles
- Lowest ceiling: 25,000 ft overcast
- Temperature: 57 °F, dew point 36 °F
- Altimeter: 30.00 inHg
- Observed at: IND

## 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 19840216048889I](https://openairdocs.org/incident/19840216048889I), Feb 16, 1984: Swrngn SA26AT, Indianapolis, IN, Substantial damage. Unsafe gear lights. Used manual and got safe indication. Right main gear collapsed landing. Support bracket failed.

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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