# NTSB CHI88IA141: Swearingen SA226-TC, N329BA, Chicago, IL, June 22, 1988

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: June 22, 1988, 09:05 local (14:05 UTC)
- Place: Chicago, IL
- Location: 41.8500° N, 87.6501° W: Placed by OpenAirDocs: center of Chicago, IL, within about 9 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.8500&lon=-87.6501&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 6 uninjured
- Status: Completed, report June 11, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 13996
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI88IA141
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13996/pdf
- Page: https://openairdocs.org/ntsb/CHI88IA141

## Probable cause

FAILURE OF THE FRONT MOTOR BEARING IN THE SAS SERVO MOTOR ASSEMBLY, AND THE RESULTANT 'JAMMING' OF THE ELEVATOR CONTROL CABLES. THE PILOT ABORTED THE TAKEOFF AS A RESULT OF THE VIBRATION IN THE YOKE.

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - roll/run
  - safety system(other) - failure,total (cause)
  - flight control,elevator - jammed (cause)
  - aborted takeoff - performed, pilot in command

## Aircraft

- Registration: [N329BA](https://openairdocs.org/deregistered/N329BA-2013-04-09), registration cancelled 2013-04-09, S/N TC238, built 1977 (OpenAirDocs)
- Reported make and model: SWEARINGEN SA226-TC
- Registry model: [Swearingen SA226TC](https://openairdocs.org/model/swearingen-sa226tc) (registry code 8780404) (OpenAirDocs)
- Registry engine: [AiResearch TPE331 series](https://openairdocs.org/engine/airesearch-tpe331-series) (registry code 01514, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: TC-238
- Airframe hours: 15690
- Engines: GARRETT TPE-331-10UA 940 horsepower turbo prop
- Damage: No damage
- Flight: Part 135
- Operator: Britt Airways, Inc.
- Registered owner: Britt Airways, Inc
- Airworthiness certificate: Standard, Normal; Standard, Transport
- Last inspection: AAIP, June 5, 1988, 71 hours before
- Departed: ORD, CHICAGO, IL
- Destination: PIA, PEORIA, IL
- Flight plan: IFR
- Airport: 0R0, O'Hare International, runway 32L, 13,000 × 200 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; flight instructor, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 13,500 total, 250 in the last 90 days, 80 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 14 knots, gusting 20
- Visibility: 6 statute miles
- Lowest ceiling: 10,000 ft broken
- Temperature: 82 °F, dew point 64 °F
- Altimeter: 29.00 inHg
- Observed at: ORD

## 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 19880622071469I](https://openairdocs.org/incident/19880622071469I), Jun 22, 1988: Swrngn SA226TC, Chicago, IL. Vibration in control yoke on takeoff. Aborted. Elevators seized going to gate. Sas servo motor bearings had 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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