CE560 crew experiences a rapid depressurization over quincy, il. Declared emergency, descends to une...

Attributes
ACN	468541
Time
Date	200003
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : uin.airport
State Reference	IL
Altitude	msl single value : 39000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc.artcc
Operator	common carrier : air taxi
Make Model Name	Citation V
Operating Under FAR Part	Part 135
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : atp pilot : multi engine pilot : cfi
Experience	flight time last 90 days : 180 flight time total : 5500 flight time type : 100
ASRS Report	468541
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : master caution +warning system other flight crewa
Resolutory Action	controller : issued new clearance flight crew : diverted to another airport flight crew : declared emergency
Consequence	other other Other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Aircraft at FL390 in normal cruise, smooth flight VFR conditions, over quincy, il (uin). 2 passenger on board. At approximately XA30 aircraft experienced rapid decompression. All system showed normal prior to event. Air cycle machine overheat, emergency pressurization annunciators illuminated, immediately following door seal and cabin altitude annunciation illuminated. Master warning and master caution came on. Loud air rushing noise was also apparent. Cabin altitude gauge showed nacelle moving to higher altitude rapidly. Crew completed immediate action items for 'rapid decompression and emergency descent.' passenger oxygen was manually dropped and passenger were verified to have masks on and gave thumbs up signal they were ok. Communication was established with ATC and were cleared to 10000 ft. Priority handling was given, checklist was completed for air cycle machine overheat, emergency pressurization, door seal, cabin altitude, descent, apr, landing all complete. Crew landed uneventfully at uin. Passenger were ok and in good spirits.

Original NASA ASRS Text

Title: CE560 CREW EXPERIENCES A RAPID DEPRESSURIZATION OVER QUINCY, IL. DECLARED EMER, DSNDS TO UNEVENTFUL LNDG.

Narrative: ACFT AT FL390 IN NORMAL CRUISE, SMOOTH FLT VFR CONDITIONS, OVER QUINCY, IL (UIN). 2 PAX ON BOARD. AT APPROX XA30 ACFT EXPERIENCED RAPID DECOMPRESSION. ALL SYS SHOWED NORMAL PRIOR TO EVENT. AIR CYCLE MACHINE OVERHEAT, EMER PRESSURIZATION ANNUNCIATORS ILLUMINATED, IMMEDIATELY FOLLOWING DOOR SEAL AND CABIN ALT ANNUNCIATION ILLUMINATED. MASTER WARNING AND MASTER CAUTION CAME ON. LOUD AIR RUSHING NOISE WAS ALSO APPARENT. CABIN ALT GAUGE SHOWED NACELLE MOVING TO HIGHER ALT RAPIDLY. CREW COMPLETED IMMEDIATE ACTION ITEMS FOR 'RAPID DECOMPRESSION AND EMER DSCNT.' PAX OXYGEN WAS MANUALLY DROPPED AND PAX WERE VERIFIED TO HAVE MASKS ON AND GAVE THUMBS UP SIGNAL THEY WERE OK. COM WAS ESTABLISHED WITH ATC AND WERE CLRED TO 10000 FT. PRIORITY HANDLING WAS GIVEN, CHKLIST WAS COMPLETED FOR AIR CYCLE MACHINE OVERHEAT, EMER PRESSURIZATION, DOOR SEAL, CABIN ALT, DSCNT, APR, LNDG ALL COMPLETE. CREW LANDED UNEVENTFULLY AT UIN. PAX WERE OK AND IN GOOD SPIRITS.

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.

CE560 crew experiences a rapid depressurization over quincy, il. Declared emergency, descends to uneventful landing.