Air carrier medium large transport loses all communication for a short period of time.

Attributes
ACN	264246
Time
Date	199402
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : csn
State Reference	VA
Altitude	msl bound lower : 27000 msl bound upper : 27000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc tower : bhm
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 160 flight time total : 24600 flight time type : 2100
ASRS Report	264246
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During cruise flight, flight crew experienced complete VHF communication failure. All 3 transceivers failed. Crew squawked 7600 on the transponder. Descended per the STAR for bwi. About 5 mins after failure occurred, all transceivers started to function normally. Postflt inspection revealed a moisture leak in the electronics compartment that may have caused the problem.

Original NASA ASRS Text

Title: ACR MLG LOSES ALL COM FOR A SHORT PERIOD OF TIME.

Narrative: DURING CRUISE FLT, FLC EXPERIENCED COMPLETE VHF COM FAILURE. ALL 3 TRANSCEIVERS FAILED. CREW SQUAWKED 7600 ON THE XPONDER. DSNDED PER THE STAR FOR BWI. ABOUT 5 MINS AFTER FAILURE OCCURRED, ALL TRANSCEIVERS STARTED TO FUNCTION NORMALLY. POSTFLT INSPECTION REVEALED A MOISTURE LEAK IN THE ELECTRONICS COMPARTMENT THAT MAY HAVE CAUSED THE PROB.

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.