ATR ATR 72 N248AT

Summary

On 8 March 1993 at about 19:37 local time, a ATR ATR 72 registered N248AT, operated by Simmons, was involved in an incident near Chicago, Illinois, United States. 4 people were on board and nobody was injured. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

8 March 1993 at 19:37

Classification

Incident

Location

Chicago, Illinois, United States

Coordinates

Not recorded

Aircraft

ATR ATR 72

Registration

N248AT

Category

Airplane

Engines

2

Operator

Simmons

Operating rule

Part 121: Air Carrier

Purpose of flight

Unknown

Phase of flight

Not recorded

Route

Unknown → Milwaukee

Aircraft damage

Not recorded

Weather

VMC

Light

Day

NTSB number

CHI93IA125

Nobody was injured.

the local controller's failure to issue a proper heading clearance which resulted in a loss of radar separation between two departing airplanes.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

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.

Quoted verbatim from the NTSB record.