Israel westwind 24 flight crew experienced loss of cabin pressurization and requested emergency descent. Subsequently, they also experienced radio communication problem and requested vectors to a diversion airport.

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Attributes
ACN	534071
Time
Date	200112
Day	Sun
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : den.airport
State Reference	CO
Altitude	msl single value : 28000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 2
Controlling Facilities	artcc : zdv.artcc
Operator	common carrier : air carrier
Make Model Name	IAI1124/1124A/Westwind
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4800 flight time type : 1000
ASRS Report	534071
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : landed as precaution flight crew : diverted to another airport flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Climbing through FL280, I noticed the 'cabin pressure above 10000 ft' light lit on the annunciator panel. I put on my oxygen mask and got the copilot's oxygen mask for him. I called for the checklist. Running the checklist did not fix the problem. I asked center for a descent and was cleared to 17000 ft. At this time, I started experiencing radio problems. I requested vectors to apa and landed there. Maintenance found the pressure controller bad and the hand mikes bad.

Original NASA ASRS Text

Title: ISRAEL WESTWIND 24 FLC EXPERIENCED LOSS OF CABIN PRESSURIZATION AND REQUESTED EMER DSCNT. SUBSEQUENTLY, THEY ALSO EXPERIENCED RADIO COM PROB AND REQUESTED VECTORS TO A DIVERSION ARPT.

Narrative: CLBING THROUGH FL280, I NOTICED THE 'CABIN PRESSURE ABOVE 10000 FT' LIGHT LIT ON THE ANNUNCIATOR PANEL. I PUT ON MY OXYGEN MASK AND GOT THE COPLT'S OXYGEN MASK FOR HIM. I CALLED FOR THE CHKLIST. RUNNING THE CHKLIST DID NOT FIX THE PROB. I ASKED CTR FOR A DSCNT AND WAS CLRED TO 17000 FT. AT THIS TIME, I STARTED EXPERIENCING RADIO PROBS. I REQUESTED VECTORS TO APA AND LANDED THERE. MAINT FOUND THE PRESSURE CONTROLLER BAD AND THE HAND MIKES BAD.

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.