<< >> NASA ASRS Report 439039, June 1999

Captain of a DC9 failed to stop at taxi out clearance limit due to miscommunication between the controller and the flight crew.

Attributes
ACN	439039
Time
Date	199906
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : rsw.airport
State Reference	FL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
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 : atp
Experience	flight time last 90 days : 250 flight time total : 17000 flight time type : 5000
ASRS Report	439039
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	incursion : taxiway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued alert none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

Called for pwrback (taxi) clearance. Received clearance to pwrback and taxi taxiway B west. I assumed since this was a taxiway, that we wre cleared to taxi out via taxiway B, wbound for takeoff runway 6. As we were passing taxiway B toward taxiway a, ground said that we weren't cleared to taxi past taxiway B west. This taxiway B (west) designation is not on the airport diagram. This does not conform to normal taxi clearance terminology, in that taxiway B west is not a taxi point, but a taxiway -- we don't normally get taxi clearance to a taxiway, unless it is clearance to taxi via that taxiway, which is the way I read it. Incidentally, I called ground back after initial pwrback clearance for clarification about the taxi clearance, asking 'cleared to taxi B west?' all he said was 'affirmative, B west.' if they are going to use taxiway B west as a taxi clearance limit, it should be marked as a taxi point, and clearance should use that terminology.

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Original NASA ASRS Text

Title: CAPT OF A DC9 FAILED TO STOP AT TAXI OUT CLRNC LIMIT DUE TO MISCOMMUNICATION BTWN THE CTLR AND THE FLC.

Narrative: CALLED FOR PWRBACK (TAXI) CLRNC. RECEIVED CLRNC TO PWRBACK AND TAXI TXWY B W. I ASSUMED SINCE THIS WAS A TXWY, THAT WE WRE CLRED TO TAXI OUT VIA TXWY B, WBOUND FOR TKOF RWY 6. AS WE WERE PASSING TXWY B TOWARD TXWY A, GND SAID THAT WE WEREN'T CLRED TO TAXI PAST TXWY B W. THIS TXWY B (W) DESIGNATION IS NOT ON THE ARPT DIAGRAM. THIS DOES NOT CONFORM TO NORMAL TAXI CLRNC TERMINOLOGY, IN THAT TXWY B W IS NOT A TAXI POINT, BUT A TXWY -- WE DON'T NORMALLY GET TAXI CLRNC TO A TXWY, UNLESS IT IS CLRNC TO TAXI VIA THAT TXWY, WHICH IS THE WAY I READ IT. INCIDENTALLY, I CALLED GND BACK AFTER INITIAL PWRBACK CLRNC FOR CLARIFICATION ABOUT THE TAXI CLRNC, ASKING 'CLRED TO TAXI B W?' ALL HE SAID WAS 'AFFIRMATIVE, B W.' IF THEY ARE GOING TO USE TXWY B W AS A TAXI CLRNC LIMIT, IT SHOULD BE MARKED AS A TAXI POINT, AND CLRNC SHOULD USE THAT TERMINOLOGY.

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.