Controller descends aircraft into adjacent facility airspace prior to completing coordination.

Attributes
ACN	179884
Time
Date	199106
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ilm
State Reference	NC
Altitude	msl bound lower : 10800 msl bound upper : 11000
Aircraft 1
Controlling Facilities	artcc : zdc tracon : ilm
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 8
ASRS Report	179884
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	non adherence : published procedure other anomaly other other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure Operational Deviation

Narrative:

Small aircraft X was descending to 10000' to miss traffic at 11000'. Descending to 10000' was coordinated with gsb approach, but not with ilm approach. As the aircraft was coming out of 10800', I was on the handoff line coordinating lower with ilm tower. They approved descending to 5000'. Apparently the aircraft entered their airspace prior to the handoff being taken and the supervisor wrote them up as a system deviation.

Original NASA ASRS Text

Title: CTLR DESCENDS ACFT INTO ADJACENT FAC AIRSPACE PRIOR TO COMPLETING COORD.

Narrative: SMA X WAS DSNDING TO 10000' TO MISS TFC AT 11000'. DSNDING TO 10000' WAS COORDINATED WITH GSB APCH, BUT NOT WITH ILM APCH. AS THE ACFT WAS COMING OUT OF 10800', I WAS ON THE HDOF LINE COORDINATING LOWER WITH ILM TWR. THEY APPROVED DSNDING TO 5000'. APPARENTLY THE ACFT ENTERED THEIR AIRSPACE PRIOR TO THE HDOF BEING TAKEN AND THE SUPVR WROTE THEM UP AS A SYS DEVIATION.

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.