<< >> NASA ASRS Report 632177, September 2004

MD11 flight crew is confused over their revised clearance and crossing time for 40W when alleging inadequate communication procedures by controller while on frequency with czqx.

Attributes
ACN	632177
Time
Date	200409
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : czqx.artcc
State Reference	NF
Altitude	msl single value : 30000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 110 flight time total : 16000 flight time type : 801
ASRS Report	632177
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

We were estimating 55n040w at XA43Z czqx radio called us to advise us we were to cross 040W no later than XA40. We realized we could not cut 3 min off our flight time to 40W with only 27 min to go to 40W. We advised czqx radio we would be unable to cross 40W any sooner than XA41. They acknowledged but did not cancel our clearance. We then heard them clear a company flight behind us to slow so as to cross 40W no earlier than XA42. We maintained our increased airspeed so as to cross 40W at XA42, then resumed assigned mach number. I contacted our ATC liaison, who contacted the supervisor at gander. He happened to be working that night and wasn't even aware of a problem. He agreed the clearance was a bad one and would talk with controller. My concern was: a clearance was given and not complied with and not cancelled or amended. Appears to be a non-event.

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Original NASA ASRS Text

Title: MD11 FLT CREW IS CONFUSED OVER THEIR REVISED CLRNC AND XING TIME FOR 40W WHEN ALLEGING INADEQUATE COM PROCS BY CTLR WHILE ON FREQ WITH CZQX.

Narrative: WE WERE ESTIMATING 55N040W AT XA43Z CZQX RADIO CALLED US TO ADVISE US WE WERE TO CROSS 040W NO LATER THAN XA40. WE REALIZED WE COULD NOT CUT 3 MIN OFF OUR FLT TIME TO 40W WITH ONLY 27 MIN TO GO TO 40W. WE ADVISED CZQX RADIO WE WOULD BE UNABLE TO CROSS 40W ANY SOONER THAN XA41. THEY ACKNOWLEDGED BUT DID NOT CANCEL OUR CLRNC. WE THEN HEARD THEM CLR A COMPANY FLT BEHIND US TO SLOW SO AS TO CROSS 40W NO EARLIER THAN XA42. WE MAINTAINED OUR INCREASED AIRSPD SO AS TO CROSS 40W AT XA42, THEN RESUMED ASSIGNED MACH NUMBER. I CONTACTED OUR ATC LIAISON, WHO CONTACTED THE SUPVR AT GANDER. HE HAPPENED TO BE WORKING THAT NIGHT AND WASN'T EVEN AWARE OF A PROB. HE AGREED THE CLRNC WAS A BAD ONE AND WOULD TALK WITH CTLR. MY CONCERN WAS: A CLRNC WAS GIVEN AND NOT COMPLIED WITH AND NOT CANCELLED OR AMENDED. APPEARS TO BE A NON-EVENT.

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.