<< >> NASA ASRS Report 450196, September 1999

Pilot in a BE99 on sck approach is changed to O90 approach and the frequencys, 135 pt 4 and 134 pt 5, are mixed up.

Attributes
ACN	450196
Time
Date	199909
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : lvk.airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : o90.tracon tracon : sck.tracon
Operator	common carrier : air carrier
Make Model Name	Airliner 99
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	VFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Experience	flight time last 90 days : 150 flight time total : 1950 flight time type : 85
ASRS Report	450196
Person 2
Affiliation	government : faa
Function	controller : approach controller : radar
Qualification	controller : radar
Events
Anomaly	non adherence : published procedure
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Stockton approach handed me off to bay approach 135.4, or they meant to. In put in 134.5 (also a bay approach frequency). When I checked in the controller acknowledged me. Did not correct the frequency error and I continued in to oak. The communications on the frequency seemed odd for the sector, but I didn't catch it. On 3 mi final, with no handoff and no chance to cut in on the frequency, I changed to tower. They asked me to call -- and only then did I put together the error with the weird handling I got from approach. I use 134.5 in the morning on departure. I don't know if I input the frequency wrong or was given it incorrectly. Having 2 frequencys that similar in the same facility is confusing. I have heard others confuse them, too -- controllers included.

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Original NASA ASRS Text

Title: PLT IN A BE99 ON SCK APCH IS CHANGED TO O90 APCH AND THE FREQS, 135 PT 4 AND 134 PT 5, ARE MIXED UP.

Narrative: STOCKTON APCH HANDED ME OFF TO BAY APCH 135.4, OR THEY MEANT TO. IN PUT IN 134.5 (ALSO A BAY APCH FREQ). WHEN I CHKED IN THE CTLR ACKNOWLEDGED ME. DID NOT CORRECT THE FREQ ERROR AND I CONTINUED IN TO OAK. THE COMS ON THE FREQ SEEMED ODD FOR THE SECTOR, BUT I DIDN'T CATCH IT. ON 3 MI FINAL, WITH NO HDOF AND NO CHANCE TO CUT IN ON THE FREQ, I CHANGED TO TWR. THEY ASKED ME TO CALL -- AND ONLY THEN DID I PUT TOGETHER THE ERROR WITH THE WEIRD HANDLING I GOT FROM APCH. I USE 134.5 IN THE MORNING ON DEP. I DON'T KNOW IF I INPUT THE FREQ WRONG OR WAS GIVEN IT INCORRECTLY. HAVING 2 FREQS THAT SIMILAR IN THE SAME FACILITY IS CONFUSING. I HAVE HEARD OTHERS CONFUSE THEM, TOO -- CTLRS INCLUDED.

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.