Air carrier X potential less than standard separation from air carrier Y. Potential system error.

Attributes
ACN	156253
Time
Date	199008
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ewr
State Reference	NY
Altitude	msl bound lower : 7200 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90 tower : mdw
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 5500
ASRS Report	156253
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 8000 flight time type : 900
ASRS Report	156254
Events
Anomaly	conflict : airborne less severe
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 18000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Air carrier X on initial contact with departure (lga) control. Cleared to 8000' MSL followed by an unintelligible remark. When requesting clarification, we were told to maintain 7000'. We were given an initial heading of 340 degrees which was shortly thereafter corrected further to 310 degrees and a climb clearance to 15000'. Upon vacating 7200-7300' traffic was called at our 1 O'clock position and 3 mi at 8000' and same general direction of flight. Air carrier Y light transport was visually sighted and our rate of climb, given the parallel course, precluded any evasive action.

Original NASA ASRS Text

Title: ACR X POTENTIAL LESS THAN STANDARD SEPARATION FROM ACR Y. POTENTIAL SYSTEM ERROR.

Narrative: ACR X ON INITIAL CONTACT WITH DEP (LGA) CTL. CLRED TO 8000' MSL FOLLOWED BY AN UNINTELLIGIBLE REMARK. WHEN REQUESTING CLARIFICATION, WE WERE TOLD TO MAINTAIN 7000'. WE WERE GIVEN AN INITIAL HDG OF 340 DEGS WHICH WAS SHORTLY THEREAFTER CORRECTED FURTHER TO 310 DEGS AND A CLB CLRNC TO 15000'. UPON VACATING 7200-7300' TFC WAS CALLED AT OUR 1 O'CLOCK POS AND 3 MI AT 8000' AND SAME GENERAL DIRECTION OF FLT. ACR Y LTT WAS VISUALLY SIGHTED AND OUR RATE OF CLB, GIVEN THE PARALLEL COURSE, PRECLUDED ANY EVASIVE ACTION.

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.