Narrative:

Approximately 20 mins after takeoff, #2 navigation failed. We were on a radar vector to lbl VOR, then flight plan route. At the same time a loud audio squelch sound was bleeding through #1 communication. We tried to call center with no response. Tried several frequencys on both #1 and #2 communications. We suspected we might have a stuck microphone. We unplugged all mikes in cockpit, and tried each one individually, still no help. Tried to communicate with company through ACARS, at this time the ACARS displayed a no communication message and started rolling through its initialization sequence. We were in a no communication situation. We squawked 7600 for approximately 2 min. Then returned to last code. We proceeded direct to lbl and continued on flight plan route. I had a deadheading pilot use my credit card and the air phone to call our dispatcher. We were able to get a 3 way phone patch between dispatch, ZKC, and okc approach and tower. Approximately 50 mi west of okc, we received descent clearance over the phone. Approximately 10 mi west okc, tower relayed they had us in sight and gave us landing clearance. We entered right traffic for runway 17R, and received a green light on final, which confirmed our landing clearance. The landing was normal and followed by a green light to taxi to the gate. During this event, we complied with all no communication procedures, and tried to throw in a little good judgement and common sense. All worked out well.

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Original NASA ASRS Text

Title: B737 LOST ALL COMS WHILE ENRTE.

Narrative: APPROX 20 MINS AFTER TKOF, #2 NAV FAILED. WE WERE ON A RADAR VECTOR TO LBL VOR, THEN FLT PLAN RTE. AT THE SAME TIME A LOUD AUDIO SQUELCH SOUND WAS BLEEDING THROUGH #1 COM. WE TRIED TO CALL CTR WITH NO RESPONSE. TRIED SEVERAL FREQS ON BOTH #1 AND #2 COMS. WE SUSPECTED WE MIGHT HAVE A STUCK MIKE. WE UNPLUGGED ALL MIKES IN COCKPIT, AND TRIED EACH ONE INDIVIDUALLY, STILL NO HELP. TRIED TO COMMUNICATE WITH COMPANY THROUGH ACARS, AT THIS TIME THE ACARS DISPLAYED A NO COM MESSAGE AND STARTED ROLLING THROUGH ITS INITIALIZATION SEQUENCE. WE WERE IN A NO COM SIT. WE SQUAWKED 7600 FOR APPROX 2 MIN. THEN RETURNED TO LAST CODE. WE PROCEEDED DIRECT TO LBL AND CONTINUED ON FLT PLAN RTE. I HAD A DEADHEADING PLT USE MY CREDIT CARD AND THE AIR PHONE TO CALL OUR DISPATCHER. WE WERE ABLE TO GET A 3 WAY PHONE PATCH BTWN DISPATCH, ZKC, AND OKC APCH AND TWR. APPROX 50 MI W OF OKC, WE RECEIVED DSCNT CLRNC OVER THE PHONE. APPROX 10 MI W OKC, TWR RELAYED THEY HAD US IN SIGHT AND GAVE US LNDG CLRNC. WE ENTERED R TFC FOR RWY 17R, AND RECEIVED A GREEN LIGHT ON FINAL, WHICH CONFIRMED OUR LNDG CLRNC. THE LNDG WAS NORMAL AND FOLLOWED BY A GREEN LIGHT TO TAXI TO THE GATE. DURING THIS EVENT, WE COMPLIED WITH ALL NO COM PROCS, AND TRIED TO THROW IN A LITTLE GOOD JUDGEMENT AND COMMON SENSE. ALL WORKED OUT WELL.

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.