A CL65 regional jet climbing through FL240 declared an emergency and diverted due to a passenger doo...

Attributes
ACN	425292
Time
Date	199901
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cos
State Reference	CO
Altitude	msl bound lower : 24000 msl bound upper : 24000
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Challenger CL604
Flight Phase	other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi
Experience	flight time last 90 days : 250 flight time total : 5000 flight time type : 1100
ASRS Report	425292
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
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	faa : investigated Other

Narrative:

While climbing through FL240, a passenger door stow caution message was noted and the QRH checklist procedure was applied. Shortly thereafter, a passenger door warning message was noted and the QRH checklist procedure was applied. This resulted in declaring an emergency and applying emergency descent checklist procedures. The passenger were notified and the flight proceeded back to cos and landed safely without incident. Callback conversation with reporter revealed the following information: the reporter stated the QRH on door warning requires emergency descent and depressurization of the aircraft. The reporter said the airplane has a chronic history of door warning problems. The warning normally should be a passenger door warning light then followed by the master caution light. The reporter said the actual warning varies -- one time a master caution light and maybe a passenger door warning and other times both warnings in any order. The reporter stated the warning cannot be ignored as the door is not a plug type door. The reporter said the company is working with the FAA and the manufacturer to get a more reliable system.

Original NASA ASRS Text

Title: A CL65 REGIONAL JET CLBING THROUGH FL240 DECLARED AN EMER AND DIVERTED DUE TO A PAX DOOR WARNING CAUSED BY A DEFECTIVE DOOR SENSING SYS.

Narrative: WHILE CLBING THROUGH FL240, A PAX DOOR STOW CAUTION MESSAGE WAS NOTED AND THE QRH CHKLIST PROC WAS APPLIED. SHORTLY THEREAFTER, A PAX DOOR WARNING MESSAGE WAS NOTED AND THE QRH CHKLIST PROC WAS APPLIED. THIS RESULTED IN DECLARING AN EMER AND APPLYING EMER DSCNT CHKLIST PROCS. THE PAX WERE NOTIFIED AND THE FLT PROCEEDED BACK TO COS AND LANDED SAFELY WITHOUT INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE QRH ON DOOR WARNING REQUIRES EMER DSCNT AND DEPRESSURIZATION OF THE ACFT. THE RPTR SAID THE AIRPLANE HAS A CHRONIC HISTORY OF DOOR WARNING PROBS. THE WARNING NORMALLY SHOULD BE A PAX DOOR WARNING LIGHT THEN FOLLOWED BY THE MASTER CAUTION LIGHT. THE RPTR SAID THE ACTUAL WARNING VARIES -- ONE TIME A MASTER CAUTION LIGHT AND MAYBE A PAX DOOR WARNING AND OTHER TIMES BOTH WARNINGS IN ANY ORDER. THE RPTR STATED THE WARNING CANNOT BE IGNORED AS THE DOOR IS NOT A PLUG TYPE DOOR. THE RPTR SAID THE COMPANY IS WORKING WITH THE FAA AND THE MANUFACTURER TO GET A MORE RELIABLE SYS.

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.

A CL65 regional jet climbing through FL240 declared an emergency and diverted due to a passenger door warning caused by a defective door sensing system.