Cessna 337 pilot lost radio contact during approach and after subsequently descending in VFR conditions re-established communications. Approach controller advised that it was a stuck microphone and cleared reporter for the approach.

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Attributes
ACN	519919
Time
Date	200107
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : luk.airport
State Reference	OH
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cvg.tracon tracon : dca.tracon
Operator	general aviation : personal
Make Model Name	Super Skymaster
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 20 flight time total : 15000 flight time type : 30
ASRS Report	519919
Person 2
Affiliation	government : faa
Function	controller : approach
Events
Anomaly	aircraft equipment problem : less severe non adherence other other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : com radios other controllera
Resolutory Action	aircraft : equipment problem dissipated none taken : detected after the fact
Consequence	other
Supplementary
Problem Areas	Aircraft ATC Human Performance Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

I was being vectored for an ILS approach to runway 21L at cincinnati lunken airport. About 10 mi north of the airport, I responded to a heading assignment from approach control and then heard nothing from ATC for 1 or 2 mins. I tried a radio check and got no response. I tried to contact ATC on my #2 radio with no success. I also tried to contact lunken tower on both radios, again with no success. I descended to a VFR altitude and prepared to proceed VFR to lunken while squawking 7600. I tried once again to contact approach control and was successful in making contact. ATC advised me that they suspected my microphone was stuck. They then cleared me for the approach to lunken.

Original NASA ASRS Text

Title: CESSNA 337 PLT LOST RADIO CONTACT DURING APCH AND AFTER SUBSEQUENTLY DSNDING IN VFR CONDITIONS RE-ESTABLISHED COMS. APCH CTLR ADVISED THAT IT WAS A STUCK MIKE AND CLRED RPTR FOR THE APCH.

Narrative: I WAS BEING VECTORED FOR AN ILS APCH TO RWY 21L AT CINCINNATI LUNKEN ARPT. ABOUT 10 MI N OF THE ARPT, I RESPONDED TO A HDG ASSIGNMENT FROM APCH CTL AND THEN HEARD NOTHING FROM ATC FOR 1 OR 2 MINS. I TRIED A RADIO CHK AND GOT NO RESPONSE. I TRIED TO CONTACT ATC ON MY #2 RADIO WITH NO SUCCESS. I ALSO TRIED TO CONTACT LUNKEN TWR ON BOTH RADIOS, AGAIN WITH NO SUCCESS. I DSNDED TO A VFR ALT AND PREPARED TO PROCEED VFR TO LUNKEN WHILE SQUAWKING 7600. I TRIED ONCE AGAIN TO CONTACT APCH CTL AND WAS SUCCESSFUL IN MAKING CONTACT. ATC ADVISED ME THAT THEY SUSPECTED MY MIKE WAS STUCK. THEY THEN CLRED ME FOR THE APCH TO LUNKEN.

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.