Aircraft Y climb through occupied altitude had less than standard separation from aircraft X. System...

Attributes
ACN	266064
Time
Date	199403
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sgd
State Reference	CA
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zoa tracon : sgf
Operator	general aviation : personal
Make Model Name	Piper Single Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	landing : missed approach
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	266064
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : clearance non adherence : required legal separation other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 15000 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft X PA28 at 4000 ft was told to depart sgd on the 230 degree radial for a VOR approach. Aircraft Y was on a missed approach from apc climbing to 3000 ft. Aircraft X was descended to 3000 ft and aircraft Y was climbed to 4000 ft. Aircraft X was observed overshooting the VOR and was asked to verify outbound on the 230 degree radial. Aircraft responded that they were in the turn. Loss of separation was observed and controller reported same to supervisor. Incident was caused by a lapse in good judgement. Could have been prevented by waiting longer to issue climb and descent.

Original NASA ASRS Text

Title: ACFT Y CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACFT X. SYS ERROR.

Narrative: ACFT X PA28 AT 4000 FT WAS TOLD TO DEPART SGD ON THE 230 DEG RADIAL FOR A VOR APCH. ACFT Y WAS ON A MISSED APCH FROM APC CLBING TO 3000 FT. ACFT X WAS DSNDED TO 3000 FT AND ACFT Y WAS CLBED TO 4000 FT. ACFT X WAS OBSERVED OVERSHOOTING THE VOR AND WAS ASKED TO VERIFY OUTBOUND ON THE 230 DEG RADIAL. ACFT RESPONDED THAT THEY WERE IN THE TURN. LOSS OF SEPARATION WAS OBSERVED AND CTLR RPTED SAME TO SUPVR. INCIDENT WAS CAUSED BY A LAPSE IN GOOD JUDGEMENT. COULD HAVE BEEN PREVENTED BY WAITING LONGER TO ISSUE CLB AND DSCNT.

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.

Aircraft Y climb through occupied altitude had less than standard separation from aircraft X. System error.