<< >> NASA ASRS Report 214791, July 1992

Flight crew holding in position for takeoff claims they received a clearance for takeoff and departed. Tower states that they gave no clearance.

Attributes
ACN	214791
Time
Date	199207
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : takeoff ground : holding
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000
ASRS Report	214791
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 10000
ASRS Report	214442
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was in command of flight xx as we were cleared 'on to hold' on runway 01L at sfo. Both the first officer and I heard a transmission stating 'air carrier X, cleared for takeoff runway 01L.' after we were in the air at 500 ft, sfo tower told us we had not been cleared for takeoff, even though I acknowledged and repeated the controller's takeoff clearance. Tower at sfo stated 'it is no problem -- switch to departure and good day.' upon arrival in san I phoned sfo tower to talk with the supervisor. He stated that 'he did not even pull the tape, because it was no problem. Don't worry about it.' it could have been one of the bogus xmissions occurring on the west coast as of late.

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Original NASA ASRS Text

Title: FLC HOLDING IN POS FOR TKOF CLAIMS THEY RECEIVED A CLRNC FOR TKOF AND DEPARTED. TWR STATES THAT THEY GAVE NO CLRNC.

Narrative: I WAS IN COMMAND OF FLT XX AS WE WERE CLRED 'ON TO HOLD' ON RWY 01L AT SFO. BOTH THE FO AND I HEARD A XMISSION STATING 'ACR X, CLRED FOR TKOF RWY 01L.' AFTER WE WERE IN THE AIR AT 500 FT, SFO TWR TOLD US WE HAD NOT BEEN CLRED FOR TKOF, EVEN THOUGH I ACKNOWLEDGED AND REPEATED THE CTLR'S TKOF CLRNC. TWR AT SFO STATED 'IT IS NO PROBLEM -- SWITCH TO DEP AND GOOD DAY.' UPON ARR IN SAN I PHONED SFO TWR TO TALK WITH THE SUPVR. HE STATED THAT 'HE DID NOT EVEN PULL THE TAPE, BECAUSE IT WAS NO PROBLEM. DON'T WORRY ABOUT IT.' IT COULD HAVE BEEN ONE OF THE BOGUS XMISSIONS OCCURRING ON THE W COAST AS OF LATE.

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.