Oma local controller experienced operational error with 2 departures when expected actions by the TRACON were not taken in a timely manner.

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Attributes
ACN	710457
Time
Date	200609
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : oma.airport
State Reference	NE
Environment
Flight Conditions	Marginal
Light	Dawn
Aircraft 1
Controlling Facilities	tower : oma.tower
Operator	general aviation : personal
Make Model Name	PA-31 Navajo Chieftan/Mojave/Navajo T1020
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : r90.tracon
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Experience	controller military : 7 controller non radar : 25 controller radar : 25 controller supervisory : 6
ASRS Report	710457
Person 2
Affiliation	government : faa
Function	controller : departure
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft X; PA31; departed runway 32R on a 320 degree heading to avoid a course crossover with air carrier Y; a B727; departing runway 36 on a 360 degree heading. I instructed the B727 to contact departure first; before I would turn the PA31 on a 020 degree heading. Air carrier Y was heading to memphis; tn; and aircraft X to davenport; ia. I observed air carrier Y turning eastbound; and once separation was ensured; I instructed aircraft X to turn to an assigned heading of 020 degrees. In accordance with the LOA between omaha tower and omaha approach control; the departure controller is to turn the aircraft on course at the earliest opportunity; reference prior departures. There were no prior eastbound departures coming off behind air carrier Y. The east departure controller was aware of the pending situation; but only took action at the least opportune time. I have handled this type of situation on many different occasions with no previous problems. In the future; in-trail separation will be utilized.

Original NASA ASRS Text

Title: OMA LCL CTLR EXPERIENCED OPERROR WITH 2 DEPS WHEN EXPECTED ACTIONS BY THE TRACON WERE NOT TAKEN IN A TIMELY MANNER.

Narrative: ACFT X; PA31; DEPARTED RWY 32R ON A 320 DEG HDG TO AVOID A COURSE CROSSOVER WITH ACR Y; A B727; DEPARTING RWY 36 ON A 360 DEG HDG. I INSTRUCTED THE B727 TO CONTACT DEP FIRST; BEFORE I WOULD TURN THE PA31 ON A 020 DEG HDG. ACR Y WAS HEADING TO MEMPHIS; TN; AND ACFT X TO DAVENPORT; IA. I OBSERVED ACR Y TURNING EBOUND; AND ONCE SEPARATION WAS ENSURED; I INSTRUCTED ACFT X TO TURN TO AN ASSIGNED HDG OF 020 DEGS. IN ACCORDANCE WITH THE LOA BTWN OMAHA TWR AND OMAHA APCH CTL; THE DEP CTLR IS TO TURN THE ACFT ON COURSE AT THE EARLIEST OPPORTUNITY; REF PRIOR DEPS. THERE WERE NO PRIOR EBOUND DEPS COMING OFF BEHIND ACR Y. THE E DEP CTLR WAS AWARE OF THE PENDING SITUATION; BUT ONLY TOOK ACTION AT THE LEAST OPPORTUNE TIME. I HAVE HANDLED THIS TYPE OF SITUATION ON MANY DIFFERENT OCCASIONS WITH NO PREVIOUS PROBS. IN THE FUTURE; IN-TRAIL SEPARATION WILL BE UTILIZED.

Data retrieved from NASA's ASRS site as of January 2009 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.