A B757-200 flight crew experience VHF radio communication problems departing sfo.

Attributes
ACN	620272
Time
Date	200406
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sf0.airport
State Reference	CA
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : nct.tracon tower : sfo.tower
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude climbout : initial climbout : takeoff
Route In Use	departure sid : sfo
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 280 flight time total : 15000 flight time type : 2600
ASRS Report	620272
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft ATC Human Performance
Primary Problem	Aircraft

Narrative:

All radio communication was lost shortly after takeoff. In accordance with far's, we continued to attempt to contact ATC and proceeded on course squawking transponder code 7600. Contact was established with dispatch via ACARS data link. Intermittent contact was made via VHF with other aircraft and ATC, however, they continued to report our mikes were stuck on every frequency we attempted to use. VHF contact was impossible at this point. Contact was established with maintenance via ACARS data link. They began a lengthy troubleshooting dialog with us via ACARS. At XA20Z, maintenance advised that pulling circuit breakers might solve our problem. I elected to comply with their request and opened those circuit breakers. We lost all communication capability on the first officer's side of the cockpit as well as the observer's position. Captain was able to establish VHF contact with ATC approximately XA40Z. Maintined continuous contact with ZDV and beyond. Approximately XB20Z, ATC assigned discrete transponder squawk to relieve us of the 7600 code. Maintenance verified our condition at XB19Z and in conference with dispatch, we all agreed the WX conditions would continue to be VFR along our route as well as at our destination. The decision was made to continue to ewr and advise ATC of our intentions as well as establish a contingency plan should we lose the VHF communication prior to landing. Flight continued uneventfully to ewr.

Original NASA ASRS Text

Title: A B757-200 FLT CREW EXPERIENCE VHF RADIO COM PROBS DEPARTING SFO.

Narrative: ALL RADIO COM WAS LOST SHORTLY AFTER TKOF. IN ACCORDANCE WITH FAR'S, WE CONTINUED TO ATTEMPT TO CONTACT ATC AND PROCEEDED ON COURSE SQUAWKING XPONDER CODE 7600. CONTACT WAS ESTABLISHED WITH DISPATCH VIA ACARS DATA LINK. INTERMITTENT CONTACT WAS MADE VIA VHF WITH OTHER ACFT AND ATC, HOWEVER, THEY CONTINUED TO RPT OUR MIKES WERE STUCK ON EVERY FREQ WE ATTEMPTED TO USE. VHF CONTACT WAS IMPOSSIBLE AT THIS POINT. CONTACT WAS ESTABLISHED WITH MAINT VIA ACARS DATA LINK. THEY BEGAN A LENGTHY TROUBLESHOOTING DIALOG WITH US VIA ACARS. AT XA20Z, MAINT ADVISED THAT PULLING CIRCUIT BREAKERS MIGHT SOLVE OUR PROB. I ELECTED TO COMPLY WITH THEIR REQUEST AND OPENED THOSE CIRCUIT BREAKERS. WE LOST ALL COM CAPABILITY ON THE FO'S SIDE OF THE COCKPIT AS WELL AS THE OBSERVER'S POS. CAPT WAS ABLE TO ESTABLISH VHF CONTACT WITH ATC APPROX XA40Z. MAINTINED CONTINUOUS CONTACT WITH ZDV AND BEYOND. APPROX XB20Z, ATC ASSIGNED DISCRETE XPONDER SQUAWK TO RELIEVE US OF THE 7600 CODE. MAINT VERIFIED OUR CONDITION AT XB19Z AND IN CONFERENCE WITH DISPATCH, WE ALL AGREED THE WX CONDITIONS WOULD CONTINUE TO BE VFR ALONG OUR RTE AS WELL AS AT OUR DEST. THE DECISION WAS MADE TO CONTINUE TO EWR AND ADVISE ATC OF OUR INTENTIONS AS WELL AS ESTABLISH A CONTINGENCY PLAN SHOULD WE LOSE THE VHF COM PRIOR TO LNDG. FLT CONTINUED UNEVENTFULLY TO EWR.

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.