Less than standard separation between air carrier and small aircraft. Operational error.

Attributes
ACN	101874
Time
Date	198901
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : syr
State Reference	NY
Altitude	msl bound lower : 6000 msl bound upper : 6200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : syr
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach descent other
Route In Use	enroute airway : v2
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure controller : approach
Qualification	controller : radar
ASRS Report	101874
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Miss Distance	horizontal : 1650 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X on ILS 10 approach descended from 90 to 30. Small aircraft Y on V2 wbound was at 60 but I misread strip to show 80 (top half of numbers was cut off) and small aircraft Y radio was weak so I missed call in at 60 (assumed it was 80). I asked air carrier X pilot to expedite descent out of 70, thinking traffic was at 80, and didn't realize traffic was at 60 until they were passing each other 2 1/2 to 3 miles laterally at 60.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION BETWEEN ACR AND SMA. OPERATIONAL ERROR.

Narrative: ACR X ON ILS 10 APCH DSNDED FROM 90 TO 30. SMA Y ON V2 WBOUND WAS AT 60 BUT I MISREAD STRIP TO SHOW 80 (TOP HALF OF NUMBERS WAS CUT OFF) AND SMA Y RADIO WAS WEAK SO I MISSED CALL IN AT 60 (ASSUMED IT WAS 80). I ASKED ACR X PLT TO EXPEDITE DSCNT OUT OF 70, THINKING TFC WAS AT 80, AND DIDN'T REALIZE TFC WAS AT 60 UNTIL THEY WERE PASSING EACH OTHER 2 1/2 TO 3 MILES LATERALLY AT 60.

Data retrieved from NASA's ASRS site as of August 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.