An air carrier light transport had a stuck microphone on ground, tower, and TRACON frequencys.

Attributes
ACN	251810
Time
Date	199309
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : phl
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 1500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : phl tower : phl artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : initial climbout : takeoff ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 3000 flight time type : 90
ASRS Report	251810
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : far other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

While taxiing out for departure to runway 17 during heavy rain we experienced a stuck microphone on ground, tower and subsequently departure control. We unknowingly transmitted casual cockpit communication over the air. The stuck microphone was intermittent due to a short caused by moisture in my headset jack box. We were not adhering to sterile cockpit procedures during this event, nor are we exactly sure what was transmitted. We should have noticed the silence during the stuck microphone intervals and the 'tx' transmit indicator on the radio.

Original NASA ASRS Text

Title: AN ACR LTT HAD A STUCK MIKE ON GND, TWR, AND TRACON FREQS.

Narrative: WHILE TAXIING OUT FOR DEP TO RWY 17 DURING HVY RAIN WE EXPERIENCED A STUCK MIKE ON GND, TWR AND SUBSEQUENTLY DEP CTL. WE UNKNOWINGLY XMITTED CASUAL COCKPIT COM OVER THE AIR. THE STUCK MIKE WAS INTERMITTENT DUE TO A SHORT CAUSED BY MOISTURE IN MY HEADSET JACK BOX. WE WERE NOT ADHERING TO STERILE COCKPIT PROCS DURING THIS EVENT, NOR ARE WE EXACTLY SURE WHAT WAS XMITTED. WE SHOULD HAVE NOTICED THE SILENCE DURING THE STUCK MIKE INTERVALS AND THE 'TX' XMIT INDICATOR ON THE RADIO.

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.