Chs controller described a potential unsafe operation when an aircraft was cleared for a visual appr...

Narrative:

A C17 was on a right downwind vector for runway 3 at chs. A BE40 arrival into jzi; an uncontrolled airport; from the east was cleared for a visual approach at jzi. I overheard the west radar controller advised the C17 of the landing traffic at jzi which was approximately 12 o'clock and eight miles. The radar controller also advised that traffic was not expected to go missed. The C17 advised that he was searching. The C17 was issued a northwest bound heading away from jzi. The BE40 had not canceled IFR; and the C17 was over jzi at 2;000 ft. I believe the above created an unsafe situation and will recommend changing the chs SOP; requiring for aircraft to be at or above 3;000 ft over jzi. Recommendation; changing the chs SOP; requiring aircraft to be at or above 3;000 ft over jzi.

Original NASA ASRS Text

Title: CHS Controller described a potential unsafe operation when an aircraft was cleared for a visual approach to JZI; but had not canceled IFR prior to another controller vectoring aircraft overhead without insuring separation.

Narrative: A C17 was on a right downwind vector for Runway 3 at CHS. A BE40 arrival into JZI; an uncontrolled airport; from the east was cleared for a visual approach at JZI. I overheard the West RADAR Controller advised the C17 of the landing traffic at JZI which was approximately 12 o'clock and eight miles. The RADAR Controller also advised that traffic was not expected to go missed. The C17 advised that he was searching. The C17 was issued a northwest bound heading away from JZI. The BE40 had not canceled IFR; and the C17 was over JZI at 2;000 FT. I believe the above created an unsafe situation and will recommend changing the CHS SOP; requiring for aircraft to be at or above 3;000 FT over JZI. Recommendation; changing the CHS SOP; requiring aircraft to be at or above 3;000 FT over JZI.

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.

Attributes
ACN	922326
Time
Date	201012
Local Time Of Day	1801-2400
Place
Locale Reference	CHS.Tower
State Reference	SC
Aircraft 1
Make Model Name	Beechjet 400
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Globemaster (C-17)
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types

Chs controller described a potential unsafe operation when an aircraft was cleared for a visual approach to jzi; but had not canceled IFR prior to another controller vectoring aircraft overhead without insuring separation.