Air carrier medium large transport lost radio communication after takeoff account radio audio accessory unit in east and east compartment shook loose from contacts. Return and land VFR.

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Attributes
ACN	90698
Time
Date	198807
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cle
State Reference	OH
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cle tracon : phl
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6400 flight time type : 3400
ASRS Report	90698
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 215 flight time total : 10400 flight time type : 3300
ASRS Report	90934
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

After takeoff, we attempted to contact departure control, but were unable to do so on either radio. Unbeknownst to us, the audio accessory unit in the electronics/equipment bay had separated from its connector at rotation, causing a failure of both radio transmitters, cockpit to cabin P/a and interphone. After leveling at our initial altitude, we tried to recover what radio capability that we could and squawked 7700/7600 appropriately. After considering our options, we decided to stay VFR and return to cle. We flew to the dryer VOR and flew a feeder route to the NDB approach runway 5R (the ILS was out at the time). Along the way, ATC established a listening contact with us by use of the identify on the transponder (receivers worked ok on departure control frequency if we turned up radio vol really high). Clearance to land was given for runway 5R and we landed west/O further incident. On T/D, the accessory unit was bumped back into place and the radios worked ok. Doesn't say much for my lndgs, but it does say something for losing radios in a modern day part 121 carrier. It does happen! The audio accessory unit was resecured properly and the flight continued on to msp.

Original NASA ASRS Text

Title: ACR MLG LOST RADIO COM AFTER TKOF ACCOUNT RADIO AUDIO ACCESSORY UNIT IN E AND E COMPARTMENT SHOOK LOOSE FROM CONTACTS. RETURN AND LAND VFR.

Narrative: AFTER TKOF, WE ATTEMPTED TO CONTACT DEP CTL, BUT WERE UNABLE TO DO SO ON EITHER RADIO. UNBEKNOWNST TO US, THE AUDIO ACCESSORY UNIT IN THE ELECTRONICS/EQUIP BAY HAD SEPARATED FROM ITS CONNECTOR AT ROTATION, CAUSING A FAILURE OF BOTH RADIO XMITTERS, COCKPIT TO CABIN P/A AND INTERPHONE. AFTER LEVELING AT OUR INITIAL ALT, WE TRIED TO RECOVER WHAT RADIO CAPABILITY THAT WE COULD AND SQUAWKED 7700/7600 APPROPRIATELY. AFTER CONSIDERING OUR OPTIONS, WE DECIDED TO STAY VFR AND RETURN TO CLE. WE FLEW TO THE DRYER VOR AND FLEW A FEEDER ROUTE TO THE NDB APCH RWY 5R (THE ILS WAS OUT AT THE TIME). ALONG THE WAY, ATC ESTABLISHED A LISTENING CONTACT WITH US BY USE OF THE IDENT ON THE TRANSPONDER (RECEIVERS WORKED OK ON DEP CTL FREQ IF WE TURNED UP RADIO VOL REALLY HIGH). CLRNC TO LAND WAS GIVEN FOR RWY 5R AND WE LANDED W/O FURTHER INCIDENT. ON T/D, THE ACCESSORY UNIT WAS BUMPED BACK INTO PLACE AND THE RADIOS WORKED OK. DOESN'T SAY MUCH FOR MY LNDGS, BUT IT DOES SAY SOMETHING FOR LOSING RADIOS IN A MODERN DAY PART 121 CARRIER. IT DOES HAPPEN! THE AUDIO ACCESSORY UNIT WAS RESECURED PROPERLY AND THE FLT CONTINUED ON TO MSP.

Data retrieved from NASA's ASRS site as of August 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.