<< >> NASA ASRS Report 472600, May 2000

After resolving a possible traffic conflict on the ground at detroit, crew realizes that they have changed ground control frequency too soon and may have been the cause of a conflict.

Attributes
ACN	472600
Time
Date	200005
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw.airport
State Reference	MI
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : dtw.tower
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 214 flight time total : 16350 flight time type : 2203
ASRS Report	472600
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	non adherence : published procedure non adherence : clearance other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were told to contact north ground at K12. As we continued northbound, I just happened to notice at my 9 O'clock position a DC9 exiting the runway on a high speed taxiway that intersected with ours. I slowed down and he slowed down. Thinking tower had told him to give way to us, and not hearing anything contrary from ground control, I continued, at which time I noticed first officer had switched to north ground prematurely. I don't know if south ground was trying to get a hold of us at that point. Nothing was mentioned to us by ATC.

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Original NASA ASRS Text

Title: AFTER RESOLVING A POSSIBLE TFC CONFLICT ON THE GND AT DETROIT, CREW REALIZES THAT THEY HAVE CHANGED GND CTL FREQ TOO SOON AND MAY HAVE BEEN THE CAUSE OF A CONFLICT.

Narrative: WE WERE TOLD TO CONTACT N GND AT K12. AS WE CONTINUED NBOUND, I JUST HAPPENED TO NOTICE AT MY 9 O'CLOCK POS A DC9 EXITING THE RWY ON A HIGH SPD TXWY THAT INTERSECTED WITH OURS. I SLOWED DOWN AND HE SLOWED DOWN. THINKING TWR HAD TOLD HIM TO GIVE WAY TO US, AND NOT HEARING ANYTHING CONTRARY FROM GND CTL, I CONTINUED, AT WHICH TIME I NOTICED FO HAD SWITCHED TO N GND PREMATURELY. I DON'T KNOW IF S GND WAS TRYING TO GET A HOLD OF US AT THAT POINT. NOTHING WAS MENTIONED TO US BY ATC.

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.