Emergency declared for emergency descent after cpr jet suffers a front left cracked windshield.

Attributes
ACN	262101
Time
Date	199401
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : iiu
State Reference	KY
Altitude	msl bound lower : 36500 msl bound upper : 36500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	general aviation : corporate
Make Model Name	MU-300 Diamond 1/1A
Operating Under FAR Part	Part 91
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude other other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 35 flight time total : 340 flight time type : 2
ASRS Report	262101
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 50 flight time total : 7000 flight time type : 700
ASRS Report	261951
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : declared emergency other
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

While climbing through FL365 to FL370, the outer pane of the left side windshield cracked into a spider web shape. ATC was notified, they could not give us an altitude below FL340, so we declared an emergency. The aircraft maintained pressurization, but we were not sure of the windshield integrity so the rapid decompression checklist was completed followed by the emergency descent checklist. We executed an emergency descent down to 10000 ft MSL. We were then vectored to the ILS 19 approach course where we broke out of IMC 300 ft AGL. The flight terminated in a safe landing. Supplemental information from acn 261951: even though the aircraft did not depressurize, I ran the emergency descent checklist, informing the passenger and discussing contingencies with my so. Since a return to land at sdf was requested after declaring the emergency, we briefed the approach and discussed the possibility of the copilot landing the aircraft if my vision was obscured. The approach and landing were normal. Having the ability to interact as a crew was a strong factor in the success of this flight.

Original NASA ASRS Text

Title: EMER DECLARED FOR EMER DSCNT AFTER CPR JET SUFFERS A FRONT L CRACKED WINDSHIELD.

Narrative: WHILE CLBING THROUGH FL365 TO FL370, THE OUTER PANE OF THE L SIDE WINDSHIELD CRACKED INTO A SPIDER WEB SHAPE. ATC WAS NOTIFIED, THEY COULD NOT GIVE US AN ALT BELOW FL340, SO WE DECLARED AN EMER. THE ACFT MAINTAINED PRESSURIZATION, BUT WE WERE NOT SURE OF THE WINDSHIELD INTEGRITY SO THE RAPID DECOMPRESSION CHKLIST WAS COMPLETED FOLLOWED BY THE EMER DSCNT CHKLIST. WE EXECUTED AN EMER DSCNT DOWN TO 10000 FT MSL. WE WERE THEN VECTORED TO THE ILS 19 APCH COURSE WHERE WE BROKE OUT OF IMC 300 FT AGL. THE FLT TERMINATED IN A SAFE LNDG. SUPPLEMENTAL INFO FROM ACN 261951: EVEN THOUGH THE ACFT DID NOT DEPRESSURIZE, I RAN THE EMER DSCNT CHKLIST, INFORMING THE PAX AND DISCUSSING CONTINGENCIES WITH MY SO. SINCE A RETURN TO LAND AT SDF WAS REQUESTED AFTER DECLARING THE EMER, WE BRIEFED THE APCH AND DISCUSSED THE POSSIBILITY OF THE COPLT LNDG THE ACFT IF MY VISION WAS OBSCURED. THE APCH AND LNDG WERE NORMAL. HAVING THE ABILITY TO INTERACT AS A CREW WAS A STRONG FACTOR IN THE SUCCESS OF THIS FLT.

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.