B727 flight crew assume company ramp controller taxi instructions have the approval coordination with mem tower ground control and taxi from company ramp to the runway 27 for departure. Tower advises flight crew this was not authority/authorized or coordinated with the tower.

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Attributes
ACN	428115
Time
Date	199902
Day	Tue
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : mem.airport
State Reference	TN
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	ground : pushback ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer pilot : multi engine pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 85 flight time total : 13010 flight time type : 150
ASRS Report	428115
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 125 flight time total : 3500 flight time type : 175
ASRS Report	428116
Events
Anomaly	incursion : taxiway non adherence : far
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Company Flight Crew Human Performance
Primary Problem	Company
Air Traffic Incident	Pilot Deviation

Narrative:

After normal push from the gate, we called for taxi instructions. Company has their own 'ramp tower controllers' and that is our normal procedure to call them for runway assignment and taxi instructions. On this event, ramp tower instructed us to 'taxi to runway 27 hold line, call tower on 118.3.' our ramp tower usually does not do this, but due to some arrangements with ZME, ground and tower, they sometimes save time by handing us off from company ramp control direct to tower without any contact with ZME or ground control. I believe ramp tower told us to do something. They didn't coordinate with ATC. When we called mem tower at 'runway 27 hold line' they asked, who cleared you on the txwys and instructions to hold short of runway 27? We replied, ramp tower said 'taxi to runway 27 hold line call tower 118.3.' tower said they have no authority/authorized to tell us to taxi on the txwys. We followed instructions given and seems we are confused as to who 'miscommunicated' to whom!

Original NASA ASRS Text

Title: B727 FLC ASSUME COMPANY RAMP CTLR TAXI INSTRUCTIONS HAVE THE APPROVAL COORD WITH MEM TWR GND CTL AND TAXI FROM COMPANY RAMP TO THE RWY 27 FOR DEP. TWR ADVISES FLC THIS WAS NOT AUTH OR COORDINATED WITH THE TWR.

Narrative: AFTER NORMAL PUSH FROM THE GATE, WE CALLED FOR TAXI INSTRUCTIONS. COMPANY HAS THEIR OWN 'RAMP TWR CTLRS' AND THAT IS OUR NORMAL PROC TO CALL THEM FOR RWY ASSIGNMENT AND TAXI INSTRUCTIONS. ON THIS EVENT, RAMP TWR INSTRUCTED US TO 'TAXI TO RWY 27 HOLD LINE, CALL TWR ON 118.3.' OUR RAMP TWR USUALLY DOES NOT DO THIS, BUT DUE TO SOME ARRANGEMENTS WITH ZME, GND AND TWR, THEY SOMETIMES SAVE TIME BY HANDING US OFF FROM COMPANY RAMP CTL DIRECT TO TWR WITHOUT ANY CONTACT WITH ZME OR GND CTL. I BELIEVE RAMP TWR TOLD US TO DO SOMETHING. THEY DIDN'T COORDINATE WITH ATC. WHEN WE CALLED MEM TWR AT 'RWY 27 HOLD LINE' THEY ASKED, WHO CLRED YOU ON THE TXWYS AND INSTRUCTIONS TO HOLD SHORT OF RWY 27? WE REPLIED, RAMP TWR SAID 'TAXI TO RWY 27 HOLD LINE CALL TWR 118.3.' TWR SAID THEY HAVE NO AUTH TO TELL US TO TAXI ON THE TXWYS. WE FOLLOWED INSTRUCTIONS GIVEN AND SEEMS WE ARE CONFUSED AS TO WHO 'MISCOMMUNICATED' TO WHOM!

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.