Light transport aircraft on demonstration flight for sale has decompression problem. Descends without clearance when unable to make break in on frequency.

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Attributes
ACN	339883
Time
Date	199606
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : fam
State Reference	MO
Altitude	msl bound lower : 15000 msl bound upper : 23000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 43 flight time total : 7400 flight time type : 4350
ASRS Report	339883
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Was operating aircraft on a test/sales acceptance flight with customer in left seat. At FL230 customer was slowing aircraft for slow flight and extended the gear. Shortly thereafter, we experienced a radio decompression with the cabin reaching ambient altitude. I repeatedly tried to contact ZKC to request a rapid descent, but center did not respond promptly. I instructed the PF to initiate a rapid descent to 15000 ft, which he did. ZKC called during descent and I advised them of the problem. They were very helpful thereafter and provided immediate clearance for return to stl.

Original NASA ASRS Text

Title: LTT ACFT ON DEMO FLT FOR SALE HAS DECOMPRESSION PROB. DSNDS WITHOUT CLRNC WHEN UNABLE TO MAKE BREAK IN ON FREQ.

Narrative: WAS OPERATING ACFT ON A TEST/SALES ACCEPTANCE FLT WITH CUSTOMER IN L SEAT. AT FL230 CUSTOMER WAS SLOWING ACFT FOR SLOW FLT AND EXTENDED THE GEAR. SHORTLY THEREAFTER, WE EXPERIENCED A RADIO DECOMPRESSION WITH THE CABIN REACHING AMBIENT ALT. I REPEATEDLY TRIED TO CONTACT ZKC TO REQUEST A RAPID DSCNT, BUT CTR DID NOT RESPOND PROMPTLY. I INSTRUCTED THE PF TO INITIATE A RAPID DSCNT TO 15000 FT, WHICH HE DID. ZKC CALLED DURING DSCNT AND I ADVISED THEM OF THE PROB. THEY WERE VERY HELPFUL THEREAFTER AND PROVIDED IMMEDIATE CLRNC FOR RETURN TO STL.

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.