Tpa TRACON controller experienced operational error at 9000 ft when failing to realize over flight t...

Attributes
ACN	847222
Time
Date	200908
Local Time Of Day	0601-1200
Place
Locale Reference	TPA.TRACON
State Reference	FL
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Other Holding
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Airway V157
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Military 6 Air Traffic Control Radar 26 Air Traffic Control Time Certified In Pos 1 (yrs) 23
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict
Miss Distance	Horizontal .66 Vertical 300

Narrative:

Tampa approach had heavy thunderstorm activity moving from west to east over the airport and began shutting off arrivals. Because of the weather; most traffic was forced to the east side (east departure area). The east departure cpc was working eight (8) aircraft; including 4 air carriers holding over lakeland VOR at 7;000 ft; 8;000 ft; 9;000 ft; 10;000 ft. The cpc had increased voice communications because of the weather deviations; arrivals shut off; holding; and adjacent sectors requesting information on who could land. The cpc forgot to check the altitudes of the over flight on V157 which runs north and south across the lakeland holding pattern. Small aircraft was south bound on V157 at 9;000 ft and A320 was west bound holding at 9;000 ft. The cpc noticed the conflict developing and immediately turned small aircraft left and advised him of the other traffic. However; loss of separation occurred.

Original NASA ASRS Text

Title: TPA TRACON Controller experienced operational error at 9000 FT when failing to realize over flight traffic would conflict with holding traffic. Weather; traffic volume and increased communication listed as causal factors.

Narrative: Tampa Approach had heavy thunderstorm activity moving from west to east over the airport and began shutting off arrivals. Because of the weather; most traffic was forced to the east side (East Departure Area). The East Departure CPC was working eight (8) aircraft; including 4 air carriers holding over Lakeland VOR at 7;000 FT; 8;000 FT; 9;000 FT; 10;000 FT. The CPC had increased voice communications because of the weather deviations; arrivals shut off; holding; and adjacent sectors requesting information on who could land. The CPC forgot to check the altitudes of the over flight on V157 which runs north and south across the Lakeland holding pattern. Small aircraft was south bound on V157 at 9;000 FT and A320 was west bound holding at 9;000 FT. The CPC noticed the conflict developing and immediately turned small aircraft left and advised him of the other traffic. However; loss of separation occurred.

Data retrieved from NASA's ASRS site as of April 2012 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.

Tpa TRACON controller experienced operational error at 9000 ft when failing to realize over flight traffic would conflict with holding traffic. Weather; traffic volume and increased communication listed as causal factors.