|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||airport : sfo.airport|
|Altitude||agl single value : 0|
|Operator||common carrier : air carrier|
|Make Model Name||A320|
|Operating Under FAR Part||Part 121|
|Flight Phase||climbout : initial|
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Qualification||pilot : atp|
|Affiliation||government : faa|
|Function||controller : ground|
|Anomaly||non adherence : published procedure|
|Independent Detector||other controllera|
|Resolutory Action||none taken : detected after the fact|
|Problem Areas||Chart Or Publication|
Flight Crew Human Performance
|Primary Problem||Flight Crew Human Performance|
After takeoff; tower instructed us to contact norcal departure. Attempted to contact departure on frequency 124.25. ATC advised we were on wrong frequency. We both checked the frequency and the pre departure clearance printout; then queried ATC on 124.25 again. This time the controller stated we were on ground control. We both re-read the pre departure clearance and then found the correct frequency on SID. There was a few moments of needless confusion during a critical phase of flight. The pre departure clearance read as follows: maintain 15000 ft; expect requested altitude 10 mins after takeoff; ground control frequency 124.25; departure control see SID.' both pilots saw 124.25 departure control. It seems nonstandard to see a ground control frequency and not a departure control frequency on a pre departure clearance. The nonstandard ground control frequency is not published in the commercial chart nor was it broadcast on the ATIS. The normal ground control frequency was also in use so this was not the case of an inoperative frequency. The only frequency listed on a pre departure clearance should be the departure control frequency. I think sfo is using a nonstandard format. Ground control issues should be published elsewhere.
Original NASA ASRS Text
Title: AN ACR FO REPORTED ATTEMPTING TO CONTACT TRACON ON THE WRONG FREQ AFTER TAKEOFF BECAUSE OF CONFUSING PDC FORMAT.
Narrative: AFTER TKOF; TWR INSTRUCTED US TO CONTACT NORCAL DEP. ATTEMPTED TO CONTACT DEP ON FREQ 124.25. ATC ADVISED WE WERE ON WRONG FREQ. WE BOTH CHKED THE FREQ AND THE PDC PRINTOUT; THEN QUERIED ATC ON 124.25 AGAIN. THIS TIME THE CTLR STATED WE WERE ON GND CTL. WE BOTH RE-READ THE PDC AND THEN FOUND THE CORRECT FREQ ON SID. THERE WAS A FEW MOMENTS OF NEEDLESS CONFUSION DURING A CRITICAL PHASE OF FLT. THE PDC READ AS FOLLOWS: MAINTAIN 15000 FT; EXPECT REQUESTED ALT 10 MINS AFTER TKOF; GND CTL FREQ 124.25; DEP CTL SEE SID.' BOTH PLTS SAW 124.25 DEP CTL. IT SEEMS NONSTANDARD TO SEE A GND CTL FREQ AND NOT A DEP CTL FREQ ON A PDC. THE NONSTANDARD GND CTL FREQ IS NOT PUBLISHED IN THE COMMERCIAL CHART NOR WAS IT BROADCAST ON THE ATIS. THE NORMAL GND CTL FREQ WAS ALSO IN USE SO THIS WAS NOT THE CASE OF AN INOP FREQ. THE ONLY FREQ LISTED ON A PDC SHOULD BE THE DEP CTL FREQ. I THINK SFO IS USING A NONSTANDARD FORMAT. GND CTL ISSUES SHOULD BE PUBLISHED ELSEWHERE.
Data retrieved from NASA's ASRS site as of May 2009 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.