Stuck microphone while aircraft is on the ground.

Attributes
ACN	276169
Time
Date	199407
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mmu
State Reference	NJ
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	ground : preflight
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot oversight : pic
Qualification	pilot : instrument pilot : atp
Experience	flight time last 90 days : 20 flight time total : 13500 flight time type : 150
ASRS Report	276169
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 25 flight time total : 4000 flight time type : 50
ASRS Report	276172
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

At mmu during our initial attempts to contact ground control, we received no reply. Shortly thereafter, a car from airport operations approached our aircraft and advised us to shut down because of a stuck microphone. After shutdown we phoned FBO requesting avionics service and were advised no avionics service available. We then checked avionics equipment, reset communication radios in racks, checked all microphone switches, etc. After this, a call-up to ground control produced a 'loud and clear' and we departed mmu without further problem. At the destination airport sullivan county international (msv), 1 hour later, communications normal on unicom. Upon return mmu and upon landing, tower advised us that our microphone was stuck once more and requested we call the tower manager on the phone. The tower manager told us that we had ground control 121.7 tied up for 20 mins prior to departure and upon our return to mmu our open microphone caused interference on tower frequency 118.1.

Original NASA ASRS Text

Title: STUCK MIKE WHILE ACFT IS ON THE GND.

Narrative: AT MMU DURING OUR INITIAL ATTEMPTS TO CONTACT GND CTL, WE RECEIVED NO REPLY. SHORTLY THEREAFTER, A CAR FROM ARPT OPS APCHED OUR ACFT AND ADVISED US TO SHUT DOWN BECAUSE OF A STUCK MIKE. AFTER SHUTDOWN WE PHONED FBO REQUESTING AVIONICS SVC AND WERE ADVISED NO AVIONICS SVC AVAILABLE. WE THEN CHKED AVIONICS EQUIP, RESET COM RADIOS IN RACKS, CHKED ALL MIKE SWITCHES, ETC. AFTER THIS, A CALL-UP TO GND CTL PRODUCED A 'LOUD AND CLR' AND WE DEPARTED MMU WITHOUT FURTHER PROB. AT THE DEST ARPT SULLIVAN COUNTY INTL (MSV), 1 HR LATER, COMS NORMAL ON UNICOM. UPON RETURN MMU AND UPON LNDG, TWR ADVISED US THAT OUR MIKE WAS STUCK ONCE MORE AND REQUESTED WE CALL THE TWR MGR ON THE PHONE. THE TWR MGR TOLD US THAT WE HAD GND CTL 121.7 TIED UP FOR 20 MINS PRIOR TO DEP AND UPON OUR RETURN TO MMU OUR OPEN MIKE CAUSED INTERFERENCE ON TWR FREQ 118.1.

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.