Individually Owned: 150,657
Corporate Owned: 137,281
O'hare International Airport
Aircraft Accident/Incident Report
Chicago, Illinois 60666
Wednesday, June 22, 1988 9:05 CDT
NTSB Narrative Summary Released at Completion of Accident
THE PILOT REPORTED THAT HE FELT A VIBRATIOIN IN THE YOKE DURING THE TAKEOFF GROUND ROLL, AND ELECTED TO ABORT THE TAKEOFF. THE PILOT STATED THAT AS THE AIRCRAFT RETURNED TO THE GATE, THE ELEVATOR CONTROLS 'SEIZED' COMPLETELY. POST-INCIDENT INVESTIGATION REVEALED THAT A BEARING IN THE SAS SERVO MOTOR ASSEMBLY HAD FAILED, ALLOWING THE MOTOR TO SEIZE, AND JAMMING THE ELEVATOR CONTROLS. THE SYSTEM IS DESIGNED WITH A SLIP CLUTCH TO ALLOW SAS ASSEMBLY OVERRIDE WITH A FORCED OF 70 TO 86 POUNDS APPLIED AT THE YOKE. AN OPERATIONAL TEST OF THE CLUTCH INDICATED THAT OVERRIDE WOULD HAVE BEEN POSSIBLE IF THE CIRCUMSTANCES HAD DEMANDED IT. THE MOST RECENT SCHEDULED INSPECTION OF THE SAS ASSEMBLY OCCURRED JUNE 5, 1988, WITH NO NOTED DISCREPENCIES. AN OPERATIONAL FLIGHT TEST OF THE SAS SYSTEM WAS PERFORMED ON JUNE 15, 1988 WITH SATISFACTORY RESULTS.
NTSB Probable Cause Narrative
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.
Event Information
| Type of Event | Incident |
| Event Date | 6/22/1988 |
| Event Day of the Week | Wednesday |
| Time of Event | 905 |
| Event Time Zone | Central Daylight Time |
| Event City | CHICAGO |
| Event State | ILLINOIS |
| Event Country | -- |
| Zipcode of the event site | 60666 |
| Event Date Year | 1988 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | O'HARE INTERNATIONAL |
| Event Location Nearest Airport ID | 0R0 |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | 667 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Witness |
| Time of the weather observation | 850 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | ORD |
| Elevation of weather observation facility | 667 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 10000 |
| Lowest Non-Ceiling Height | 7000 |
| Sky/Lowest/Cloud Conditions | Scattered |
| Sky Condition for Lowest Ceiling | Broken |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 6 |
| Air Temperature at event time (in degrees celsius) | 28 |
| Dew Point at event time (in degress fahrenheit) | 18 |
| Wind Direction (degrees magnetic) | 220 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 14 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 20 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 6 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 5097 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Jun 22 1988 12:00AM |
| NTSB Notification Time | 1100 |
| Fiche Number and/or location -used to find docket information | 39107 |
| Date of most recent change to record | Dec 13 2000 11:49AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N329BA |
| NTSB Number | CHI88IA141 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | None |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | SWEARINGEN |
| Aircraft Model | SA226-TC |
| Aircraft Series Identifier | SA226-TC |
| Aircraft Serial Number | TC-238 |
| Certified Max Gross Weight | 12500 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 22 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | AAIP |
| Date of Last Inspection | Jun 5 1988 12:00AM |
| Airframe hours since last inspection | 71 |
| Airframe Hours | 15690 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | BRITT AIRWAYS, INC |
| Aircraft Owner Street Address | R.R. 3, |
| Aircraft Owner City | DANVILLE |
| Aircraft Owner State | IL |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 61834 |
| Operator is an individual? | -- |
| Operator Name | BRITT AIRWAYS, INC. |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | R. R. 3 |
| Operator City | DANVILLE |
| Operator State | IL |
| Operator Country | |
| Operator Zip code | 61834 |
| Operator Code | BRIA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | ORD |
| Departure City | CHICAGO |
| Departure State | IL |
| Departure Country | |
| Departure Time | 905 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | PIA |
| Destination City | PEORIA |
| Destination State | IL |
| Destination Country | |
| Specific Phase of Flight | Takeoff |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:35AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 32L |
| Runway Length | 13000 |
| Runway Width | 200 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |