Close proximity 2 GA small aircraft's near ilg.

Attributes
ACN	177705
Time
Date	199105
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ilg
State Reference	DE
Altitude	msl bound lower : 2500 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ilg
Operator	general aviation : instructional
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent other
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 180 flight time total : 3000 flight time type : 1500
ASRS Report	177705
Person 2
Affiliation	Other
Function	instruction : trainee
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 500 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

We had just departed ilg airport heading west and climbing at 70 KTS to an altitude of 2500'. I was instructing my student on how to be a flight instrument. We were going over the VFR scan pattern when suddenly an small aircraft Y appeared above me about 100' and passed from my left rear to forward left. As he passed us, he was descending (it looked like he ballooned up to pass over us. We were at 2500'.

Original NASA ASRS Text

Title: CLOSE PROX 2 GA SMA'S NEAR ILG.

Narrative: WE HAD JUST DEPARTED ILG ARPT HDG W AND CLBING AT 70 KTS TO AN ALT OF 2500'. I WAS INSTRUCTING MY STUDENT ON HOW TO BE A FLT INSTR. WE WERE GOING OVER THE VFR SCAN PATTERN WHEN SUDDENLY AN SMA Y APPEARED ABOVE ME ABOUT 100' AND PASSED FROM MY LEFT REAR TO FORWARD LEFT. AS HE PASSED US, HE WAS DSNDING (IT LOOKED LIKE HE BALLOONED UP TO PASS OVER US. WE WERE AT 2500'.

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.