S80 flight crew adjusts speed to increase separation with B737 on bowie STAR and D10 controller obje...

Attributes
ACN	472786
Time
Date	200005
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : ttt.vor
State Reference	TX
Altitude	msl bound lower : 11000 msl bound upper : 12000
Environment
Light	Night
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival star : bowie
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival star : bowie
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	762
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	conflict : airborne less severe non adherence : published procedure other anomaly
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued advisory controller : issued new clearance flight crew : returned to original clearance flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0
Supplementary
Problem Areas	Flight Crew Human Performance Chart Or Publication Airspace Structure ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

While on the bowie 5 arrival, past kagle but not yet to siler, we were asked if we saw a B737 at about 1 O'clock position and 1 mi, which was level at 12000 ft. When we affirmed that traffic was in sight, we were told to maintain visual separation. The B737 was descended to 11000 in front of us. We slowed to 210 KTS to increase separation and also to comply with the speed restr at siler. After a couple of mins, the controller asked what our speed was. We replied 210 KTS. He asked why we slowed and we said to maintain visual separation from the B737. The controller became upset, sped us to 250 KTS and vectored us off the arrival prior to siler. We complied with the restrs of the arrival at all times. But his response implied that we were deviating from an ATC clearance.

Original NASA ASRS Text

Title: S80 FLC ADJUSTS SPD TO INCREASE SEPARATION WITH B737 ON BOWIE STAR AND D10 CTLR OBJECTS TO PLT'S ACTIONS.

Narrative: WHILE ON THE BOWIE 5 ARR, PAST KAGLE BUT NOT YET TO SILER, WE WERE ASKED IF WE SAW A B737 AT ABOUT 1 O'CLOCK POS AND 1 MI, WHICH WAS LEVEL AT 12000 FT. WHEN WE AFFIRMED THAT TFC WAS IN SIGHT, WE WERE TOLD TO MAINTAIN VISUAL SEPARATION. THE B737 WAS DSNDED TO 11000 IN FRONT OF US. WE SLOWED TO 210 KTS TO INCREASE SEPARATION AND ALSO TO COMPLY WITH THE SPD RESTR AT SILER. AFTER A COUPLE OF MINS, THE CTLR ASKED WHAT OUR SPD WAS. WE REPLIED 210 KTS. HE ASKED WHY WE SLOWED AND WE SAID TO MAINTAIN VISUAL SEPARATION FROM THE B737. THE CTLR BECAME UPSET, SPED US TO 250 KTS AND VECTORED US OFF THE ARR PRIOR TO SILER. WE COMPLIED WITH THE RESTRS OF THE ARR AT ALL TIMES. BUT HIS RESPONSE IMPLIED THAT WE WERE DEVIATING FROM AN ATC CLRNC.

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.

S80 flight crew adjusts speed to increase separation with B737 on bowie STAR and D10 controller objects to pilot's actions.