Near midair collision between P3 and PA-28.

Attributes
ACN	262704
Time
Date	199402
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : nbu
State Reference	IL
Altitude	msl bound lower : 1500 msl bound upper : 1800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	other
Make Model Name	Electra L-188
Operating Under FAR Part	other : other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	VFR
Person 1
Affiliation	government : military
Function	other personnel other
Qualification	pilot : military
Experience	flight time last 90 days : 25 flight time total : 1600 flight time type : 25
Person 2
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military
Events
Anomaly	conflict : nmac non adherence : far
Independent Detector	other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Upon departure from NAS glenview runway 31, while under positive radar control on assigned heading of 350 degrees, was notified by ATC of an 'aircraft at 1 O'clock, indicating 1800 fl MSL.' forward observer acquired target visually within 30 seconds and notified flight station. Crew observed aircraft closing rapidly on a constant bearing. We were climbing to 2000 ft MSL, and first saw the aircraft as we passed through 900 ft MSL. As we reached 1500 ft MSL, PIC took evasive action via a descent on heading. When crew observed other aircraft (appeared to be a piper warrior, with blue over white/beige paint) passed 400 to 500 ft directly over forward observer's station. At no time did it appear that the warrior made any type of maneuver. ATC reported that the aircraft was not in radio contact with approach.

Original NASA ASRS Text

Title: NMAC BTWN P3 AND PA-28.

Narrative: UPON DEP FROM NAS GLENVIEW RWY 31, WHILE UNDER POSITIVE RADAR CTL ON ASSIGNED HDG OF 350 DEGS, WAS NOTIFIED BY ATC OF AN 'ACFT AT 1 O'CLOCK, INDICATING 1800 FL MSL.' FORWARD OBSERVER ACQUIRED TARGET VISUALLY WITHIN 30 SECONDS AND NOTIFIED FLT STATION. CREW OBSERVED ACFT CLOSING RAPIDLY ON A CONSTANT BEARING. WE WERE CLBING TO 2000 FT MSL, AND FIRST SAW THE ACFT AS WE PASSED THROUGH 900 FT MSL. AS WE REACHED 1500 FT MSL, PIC TOOK EVASIVE ACTION VIA A DSCNT ON HDG. WHEN CREW OBSERVED OTHER ACFT (APPEARED TO BE A PIPER WARRIOR, WITH BLUE OVER WHITE/BEIGE PAINT) PASSED 400 TO 500 FT DIRECTLY OVER FORWARD OBSERVER'S STATION. AT NO TIME DID IT APPEAR THAT THE WARRIOR MADE ANY TYPE OF MANEUVER. ATC RPTED THAT THE ACFT WAS NOT IN RADIO CONTACT WITH APCH.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.