Instructor pilot claims he received a clearance on approach frequency that did not come from the con...

Attributes
ACN	197689
Time
Date	199112
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : vny
State Reference	CA
Altitude	msl bound lower : 6000 msl bound upper : 6000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Small Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute airway : v186
Flight Plan	IFR
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi pilot : instrument pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 100 flight time total : 9000
ASRS Report	197689
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	faa : investigated
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

While en route from chino to santa monica, on V-186, just prior to darts intersection, communicating with burbank approach on 136.05, we were speaking to a female controller. Just prior to crossing darts intersection, we received a questionable clearance from a male voice, giving us an airspeed change and a heading change. When we questioned the female controller, we were informed that she was the only voice handling the frequency. We strongly suspect an unauthorized transmission on this frequency. Note: inspector at lax FSDO was informed. Note: commuter light transport with cockpit voice recorder was behind us on the VOR at smo. Mr. Inspector was informed of this.

Original NASA ASRS Text

Title: INSTRUCTOR PLT CLAIMS HE RECEIVED A CLRNC ON APCH FREQ THAT DID NOT COME FROM THE CTLR.

Narrative: WHILE ENRTE FROM CHINO TO SANTA MONICA, ON V-186, JUST PRIOR TO DARTS INTXN, COMMUNICATING WITH BURBANK APCH ON 136.05, WE WERE SPEAKING TO A FEMALE CTLR. JUST PRIOR TO XING DARTS INTXN, WE RECEIVED A QUESTIONABLE CLRNC FROM A MALE VOICE, GIVING US AN AIRSPD CHANGE AND A HDG CHANGE. WHEN WE QUESTIONED THE FEMALE CTLR, WE WERE INFORMED THAT SHE WAS THE ONLY VOICE HANDLING THE FREQ. WE STRONGLY SUSPECT AN UNAUTHORIZED XMISSION ON THIS FREQ. NOTE: INSPECTOR AT LAX FSDO WAS INFORMED. NOTE: COMMUTER LTT WITH COCKPIT VOICE RECORDER WAS BEHIND US ON THE VOR AT SMO. MR. INSPECTOR WAS INFORMED OF THIS.

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.

Instructor pilot claims he received a clearance on approach frequency that did not come from the controller.