A super 80 flight crew experiences the inconvenience of a stuck microphone from another aircraft on their approach control frequency. Thinking they had simply lost their #1 radio the crew utilizes #2 radio on tower frequency to obtain the visual approach clearance.

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Attributes
ACN	389076
Time
Date	199712
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	msl bound lower : 6000 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw tower : dfw tower : sfo
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent : approach
Route In Use	approach : visual arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
ASRS Report	389076
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	389070
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

XA55Z, 6000 ft. Dfw approach, dfw 355 degree radial, 11 NM. While being vectored for visual approach on the last frequency before switching to tower for runway 18R, experienced stuck microphone effectively blocking the frequency. We actually thought we lost our #1 radio. Switched to the other radio and was cleared by tower for a visual to runway 18R. An uneventful landing was made. As far as we know, we never came close to another aircraft.

Original NASA ASRS Text

Title: A SUPER 80 FLC EXPERIENCES THE INCONVENIENCE OF A STUCK MIKE FROM ANOTHER ACFT ON THEIR APCH CTL FREQ. THINKING THEY HAD SIMPLY LOST THEIR #1 RADIO THE CREW UTILIZES #2 RADIO ON TWR FREQ TO OBTAIN THE VISUAL APCH CLRNC.

Narrative: XA55Z, 6000 FT. DFW APCH, DFW 355 DEG RADIAL, 11 NM. WHILE BEING VECTORED FOR VISUAL APCH ON THE LAST FREQ BEFORE SWITCHING TO TWR FOR RWY 18R, EXPERIENCED STUCK MIKE EFFECTIVELY BLOCKING THE FREQ. WE ACTUALLY THOUGHT WE LOST OUR #1 RADIO. SWITCHED TO THE OTHER RADIO AND WAS CLRED BY TWR FOR A VISUAL TO RWY 18R. AN UNEVENTFUL LNDG WAS MADE. AS FAR AS WE KNOW, WE NEVER CAME CLOSE TO ANOTHER ACFT.

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.