CL65 pilot refuses 8 mi separation behind a B757.

Attributes
ACN	548255
Time
Date	200205
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : cvg.airport
State Reference	OH
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : cvg.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : cvg.tracon
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 12 controller time certified in position1 : 8
ASRS Report	548255
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	inflight encounter : wake turbulence non adherence : required legal separation non adherence : published procedure other anomaly other
Independent Detector	atc equipment other atc equipment : radar other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Aircraft X issued a cautionary wake turbulence advisory for following a B757 while on downwind leg. Parallel approachs in use. Aircraft X was given a vector and approach clearance to runway 36L to join final 7 1/2 - 8 mi, behind B757, at 3000 ft MSL. Aircraft X -- no reply. Clearance was reissued -- no reply. Clearance issued a third time and pilot advised (as pilot was going through the localizer and traffic being vectored to runway 36R), he could 'not accept altitude for clearance.' he was vectored away from other traffic and questioned about his late non acceptance. Said he would not take an altitude below the heavy. The fact is he was told he was following a B757 not a heavy. They were both cleared to join at 3000 ft MSL. He had more than required separation.

Original NASA ASRS Text

Title: CL65 PLT REFUSES 8 MI SEPARATION BEHIND A B757.

Narrative: ACFT X ISSUED A CAUTIONARY WAKE TURB ADVISORY FOR FOLLOWING A B757 WHILE ON DOWNWIND LEG. PARALLEL APCHS IN USE. ACFT X WAS GIVEN A VECTOR AND APCH CLRNC TO RWY 36L TO JOIN FINAL 7 1/2 - 8 MI, BEHIND B757, AT 3000 FT MSL. ACFT X -- NO REPLY. CLRNC WAS REISSUED -- NO REPLY. CLRNC ISSUED A THIRD TIME AND PLT ADVISED (AS PLT WAS GOING THROUGH THE LOC AND TFC BEING VECTORED TO RWY 36R), HE COULD 'NOT ACCEPT ALT FOR CLRNC.' HE WAS VECTORED AWAY FROM OTHER TFC AND QUESTIONED ABOUT HIS LATE NON ACCEPTANCE. SAID HE WOULD NOT TAKE AN ALT BELOW THE HVY. THE FACT IS HE WAS TOLD HE WAS FOLLOWING A B757 NOT A HVY. THEY WERE BOTH CLRED TO JOIN AT 3000 FT MSL. HE HAD MORE THAN REQUIRED SEPARATION.

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.