Small aircraft pilot accepts clearance meant for another aircraft.

Attributes
ACN	294167
Time
Date	199501
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : oak
State Reference	CA
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak
Operator	general aviation : instructional
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : cfi pilot : instrument
Experience	flight time last 90 days : 50 flight time total : 4000 flight time type : 40
ASRS Report	294167
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	other controllera
Resolutory Action	other other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Requested ILS 27R oak. (On initial contact with bay approach). Given transponder code after waiting for follow up (radar contact, vector for ILS) I called to ask if we were radar contact. As I unkeyed microphone, I heard 'fly heading 260 maintain 3000 till established, cleared for ILS 27R approach' (the clearance I expected) I read back the clearance, followed by þand that's for abc'. Received no response to readback, so continued, shot approach. 6 mi from oak, I reminded approach þabc coming up on OM'. He replied þabc, I never tagged up on you, verify that's you 5 east of oak?' he never gave us a clearance! Didn't hear my readback! I believe a controller change occured at the position between my readback of þmy' clearance and arrival at OM. In the future, if I don't hear my callsign preceding a clearance, I will insist on acknowledgement of my readback.

Original NASA ASRS Text

Title: SMA PLT ACCEPTS CLRNC MEANT FOR ANOTHER ACFT.

Narrative: REQUESTED ILS 27R OAK. (ON INITIAL CONTACT WITH BAY APCH). GIVEN XPONDER CODE AFTER WAITING FOR FOLLOW UP (RADAR CONTACT, VECTOR FOR ILS) I CALLED TO ASK IF WE WERE RADAR CONTACT. AS I UNKEYED MIKE, I HEARD 'FLY HDG 260 MAINTAIN 3000 TILL ESTABLISHED, CLRED FOR ILS 27R APCH' (THE CLRNC I EXPECTED) I READ BACK THE CLRNC, FOLLOWED BY þAND THAT'S FOR ABC'. RECEIVED NO RESPONSE TO READBACK, SO CONTINUED, SHOT APCH. 6 MI FROM OAK, I REMINDED APCH þABC COMING UP ON OM'. HE REPLIED þABC, I NEVER TAGGED UP ON YOU, VERIFY THAT'S YOU 5 E OF OAK?' HE NEVER GAVE US A CLRNC! DIDN'T HEAR MY READBACK! I BELIEVE A CTLR CHANGE OCCURED AT THE POS BTWN MY READBACK OF þMY' CLRNC AND ARR AT OM. IN THE FUTURE, IF I DON'T HEAR MY CALLSIGN PRECEDING A CLRNC, I WILL INSIST ON ACKNOWLEDGEMENT OF MY READBACK.

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.