After losing their ability to communicate air-to-ground, the flight crewof a C560 communications with L30 and ZLA via key clicks and identify responses on transponder after departure for a return land at las, nv.

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Attributes
ACN	578595
Time
Date	200304
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : las.vortac
State Reference	NV
Altitude	msl single value : 19000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla.artcc tracon : l30.tracon tower : las.tower
Operator	general aviation : corporate
Make Model Name	Citation V
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	arrival : on vectors departure sid : acces enroute : on vectors enroute other
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : las.tower
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 130 flight time total : 15000 flight time type : 130
ASRS Report	578595
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 16300 flight time type : 1000
ASRS Report	578603
Events
Anomaly	aircraft equipment problem : critical other anomaly other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : vhf radio other controllera other controllerb
Resolutory Action	controller : issued new clearance flight crew : diverted to another airport other
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Aircraft Environmental Factor
Primary Problem	Aircraft
Air Traffic Incident	Inter Facility Coordination Failure

Narrative:

We departed las. Shortly after takeoff, as we were about to be turned over to the departure controller, we lost the ability to transmit to ATC. We could hear their instructions, but could not respond. ATC could hear us key the microphone, but there was no audio. We acknowledged several xmissions with transponder idents. At one point, the local controller asked if we would like to return to las and to respond with an identify. We did identify, but the controller was distraction with a personal conversation with another aircraft and did not acknowledge. We were cleared to FL190 and given direct to acces intersection. Upon reaching FL190, we were turned over to ZLA. We made a turn off course, hoping to get a clearance to return to las. We were able to communication with ZLA by clicking the microphone button. ZLA cleared us to return to las. All communications thereafter were by clicks of the microphone.

Original NASA ASRS Text

Title: AFTER LOSING THEIR ABILITY TO COMMUNICATE AIR-TO-GND, THE FLT CREWOF A C560 COMS WITH L30 AND ZLA VIA KEY CLICKS AND IDENT RESPONSES ON XPONDER AFTER DEP FOR A RETURN LAND AT LAS, NV.

Narrative: WE DEPARTED LAS. SHORTLY AFTER TKOF, AS WE WERE ABOUT TO BE TURNED OVER TO THE DEP CTLR, WE LOST THE ABILITY TO XMIT TO ATC. WE COULD HEAR THEIR INSTRUCTIONS, BUT COULD NOT RESPOND. ATC COULD HEAR US KEY THE MIKE, BUT THERE WAS NO AUDIO. WE ACKNOWLEDGED SEVERAL XMISSIONS WITH XPONDER IDENTS. AT ONE POINT, THE LCL CTLR ASKED IF WE WOULD LIKE TO RETURN TO LAS AND TO RESPOND WITH AN IDENT. WE DID IDENT, BUT THE CTLR WAS DISTR WITH A PERSONAL CONVERSATION WITH ANOTHER ACFT AND DID NOT ACKNOWLEDGE. WE WERE CLRED TO FL190 AND GIVEN DIRECT TO ACCES INTXN. UPON REACHING FL190, WE WERE TURNED OVER TO ZLA. WE MADE A TURN OFF COURSE, HOPING TO GET A CLRNC TO RETURN TO LAS. WE WERE ABLE TO COM WITH ZLA BY CLICKING THE MIKE BUTTON. ZLA CLRED US TO RETURN TO LAS. ALL COMS THEREAFTER WERE BY CLICKS OF THE MIKE.

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.