CHI88IA074

NTSB incident investigation · Swearingen SA226T · Chicago, IL · March 7, 1988

Incident · No injuriesIncident investigationFinal report
Date
March 7, 1988, 17:42 local (23:42 UTC)
Place
Chicago, IL
Injuries
17 uninjured
Phase of flight
Approach
Aircraft
N600TASwearingen SA226TN484SCPiper PA-31T
Weather
Visual (VMC) · Dusk
Status
Completed · report June 18, 1990
Report
Approved by Office Director
Case key
13988

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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Probable cause

The TRACON supervisor failed to comply with the established visual minima criteria and his incorrect issuance of a visual approach to an arriving aircraft.

The TRACON supervisor failed to comply with the established visual minima criteria and his incorrect issuance of visual approach to an arriving aircraft.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Near collision between aircraftApproach - vfr pattern - downwind
Ifr separation standards - not maintainedAtc personnel(dep/apch)Cause
Near collision between aircraftTakeoff - initial climb
Ifr separation standards - not maintainedAtc personnel(dep/apch)Cause

Analysis

As Piper PA-31T, N484SC, was on an IFR departure from rwy 18 at merril c meigs arpt, swearingen SA226T, N600TA was on an IFR arrival. Subsequently, the 2 acft converged aprx 3 mi south of the arpt. The crew of N484SC saw N600TA & turned to maintain separation. The passing distance was estimated to be about 2000 ft. an investigation revealed that as N600TA was arriving, the south satellite sector #1 controller (ctlr) at Chicago o'hare TRACON had clrd the crew to dscnd & maintain 2000 ft. when they (N600TA) advised that meigs was in sight, the sector #1 ctlr clrd them for a visual apch & told them to contact meigs tower. At about that time, the south satellite sector #3 ctlr at TRACON was in contact with meigs tower to provide info about N600TA concerning another matter & had released N484SC for a south- bound departure. When the sector #3 ctlr provided the release, he was unaware N600TA had been clrd for a visual apch. When N600TA contacted meigs tower, the meigs tower ctlr thought it was on a VFR arrival. Vis restricted by fog & haze.

As Piper PA-31T, N484SC, was on an IFR departure from rwy 18 at merril c meigs arpt, swearingen SA226T, N600TA was on an IFR arrival. Subsequently, the 2 acft converged aprx 3 mi south of the arpt. The crew of N484SC saw N600TA & turned to maintain separation. The passing distance was estimated to be about 2000 ft. an investigation revealed that as N600TA was arriving, the south satellite sector #1 controller (ctlr) at Chicago o'hare TRACON had clrd the crew to dscnd & maintain 2000 ft. when they (N600TA) advised that meigs was in sight, the sector #1 ctlr clrd them for a visual apch & told them to contact meigs tower. At about that time, the south satellite sector #3 ctlr at TRACON was in contact with meigs tower to provide info about N600TA concerning another matter & had released N484SC for a south- bound departure. When the sector #3 ctlr provided the release, he was unaware N600TA had been clrd for a visual apch. When N600TA contacted meigs tower, the meigs tower ctlr thought it was on a VFR arrival. Vis restricted by fog & haze.

Aircraft · 2

Registration
N600TA
Reported as
Swearingen SA226T
Category
Airplane
Serial number
274
Engine
Garrett TPE-331, 840 horsepower, turbo prop
Damage
No damage
Flight
Executive/Corporate · Part 91
Registered owner
John R. Martins
Airworthiness certificate
Standard, Normal
Departed
MLI · Moline, IL
Flight plan
IFR
Airport
CGX · Meigs

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Registration
N484SC
Reported as
Piper PA-31T
Category
Airplane
Serial number
7820022
Engine
P&W PT6A, 620 horsepower, turbo prop
Damage
No damage
Flight
Business · Part 91
Registered owner
Seufert Realty Corp.
Airworthiness certificate
Standard, Normal
Destination
HNB · Huntingburg, IN
Flight plan
IFR
Airport
CGX · Meigs

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N600TA
Age
37
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
6,300 total
Role
Pilot, aircraft N484SC
Age
41
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
4,200 total

Weather

Conditions
Visual (VMC) · Dusk
Wind
120° at 8 knots
Visibility
3 statute miles
Lowest ceiling
None
Temperature
43 °F, dew point 34 °F
Altimeter
30.00 inHg
Observed at
ORD, 15 nm away