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| Date: | Monday 8 March 1993 |
| Time: | 15:37 LT |
| Type: |  ATR 72-202 |
| Owner/operator: | Simmons Airlines |
| Registration: | N248AT |
| MSN: | 248 |
| Year of manufacture: | 1991 |
| Engine model: | P&W Canada PW124B |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Chicago-O'Hare International Airport, IL (ORD/KORD) -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | Chicago-O'Hare International Airport, IL (ORD/KORD) |
| Milwaukee, WI (KMKE) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE LOCAL CONTROLLER CLEARED SIMMONS FLIGHT 4298 FOR TAKEOFF ON RUNWAY 32L T-1 WITH INSTRUCTIONS TO FLY THE RUNWAY HEADING AFTER TAKEOFF. SHE THEN CLEARED AMERICAN 1106 FOR TAKEOFF ON RUNWAY 32L WITH INSTRUCTIONS TO TURN TO A 010 DEGREE HEADING. SIMMONS FLIGHT 4298 WAS THEN CLEARED TO A HEADING OF 360 DEGREES. THIS TURN VIOLATED THE MINIMUM DIVERGENCE HEADING SEPARATION STANDARDS OF 15 DEGREES FOR AIRPLANES TAKING OFF ON THE SAME RUNWAY AS SET FORTH IN ATC HANDBOOK 7110-65G.
Probable Cause: the local controller's failure to issue a proper heading clearance which resulted in a loss of radar separation between two departing airplanes.
Accident investigation:
 |
|
Sources:
NTSB CHI93IA125
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-Mar-2024 20:18 | ASN Update Bot | Added |
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