A CRJ200 on descent at 14000 ft declared an emergency due to overspd clacker unable to silence and '...

Attributes
ACN	673612
Time
Date	200510
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 270 flight time total : 12000 flight time type : 6000
ASRS Report	673612
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 120 flight time total : 4500 flight time type : 2500
ASRS Report	674319
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : eicas msg- aural alarm other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft Chart Or Publication
Primary Problem	Aircraft

Narrative:

On descent at 310 KTS; we got a high speed clacker that would not extinguish. It was followed by a flaps 1/2 speed status. The first officer contacted maintenance control about the clacker. While discussing this problem; we got a 'flaps fail' caution message. 'Flaps 1/2 speed' went away and the clacker extinguished. Flaps had failed at 0 degrees; 290 KTS. Clacker came back on. First officer notified maintenance control and dispatch and I declared an emergency with approach. We completed the descent checklist; QRH procedure for 'flaps fail' and notified the flight attendant. We chose not to alarm the passenger. We proceeded to ZZZ for a 0 degree flap landing. A 0 degree flap landing was accomplished per QRH procedure and company flight manual. Crash fire rescue equipment was notified that no further assistance was needed after landing. On taxi in; the first officer did a PA explaining why the emergency equipment had followed us in. No further events. A normal taxi and deplaning. No complaint or problems with the passenger. In the last 9-10 yrs I have flown this aircraft; I have done several 0 degree flap lndgs due to flap failure. Callback conversation with reporter revealed the following information: the reporter stated the 2 problems were not related as maintenance avionics technicians explained the overspd clacker problem was caused by an air data computer problem and the trailing edge flap failure was caused by the flap computer.

Original NASA ASRS Text

Title: A CRJ200 ON DSCNT AT 14000 FT DECLARED AN EMER DUE TO OVERSPD CLACKER UNABLE TO SILENCE AND 'FLAPS FAIL' MESSAGE. FLAPS FAILED FULL UP. LANDED WITH FLAPS FULLY RETRACTED.

Narrative: ON DSCNT AT 310 KTS; WE GOT A HIGH SPD CLACKER THAT WOULD NOT EXTINGUISH. IT WAS FOLLOWED BY A FLAPS 1/2 SPD STATUS. THE FO CONTACTED MAINT CTL ABOUT THE CLACKER. WHILE DISCUSSING THIS PROB; WE GOT A 'FLAPS FAIL' CAUTION MESSAGE. 'FLAPS 1/2 SPD' WENT AWAY AND THE CLACKER EXTINGUISHED. FLAPS HAD FAILED AT 0 DEGS; 290 KTS. CLACKER CAME BACK ON. FO NOTIFIED MAINT CTL AND DISPATCH AND I DECLARED AN EMER WITH APCH. WE COMPLETED THE DSCNT CHKLIST; QRH PROC FOR 'FLAPS FAIL' AND NOTIFIED THE FLT ATTENDANT. WE CHOSE NOT TO ALARM THE PAX. WE PROCEEDED TO ZZZ FOR A 0 DEG FLAP LNDG. A 0 DEG FLAP LNDG WAS ACCOMPLISHED PER QRH PROC AND COMPANY FLT MANUAL. CFR WAS NOTIFIED THAT NO FURTHER ASSISTANCE WAS NEEDED AFTER LNDG. ON TAXI IN; THE FO DID A PA EXPLAINING WHY THE EMER EQUIP HAD FOLLOWED US IN. NO FURTHER EVENTS. A NORMAL TAXI AND DEPLANING. NO COMPLAINT OR PROBS WITH THE PAX. IN THE LAST 9-10 YRS I HAVE FLOWN THIS ACFT; I HAVE DONE SEVERAL 0 DEG FLAP LNDGS DUE TO FLAP FAILURE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE 2 PROBS WERE NOT RELATED AS MAINT AVIONICS TECHNICIANS EXPLAINED THE OVERSPD CLACKER PROB WAS CAUSED BY AN ADC PROB AND THE TRAILING EDGE FLAP FAILURE WAS CAUSED BY THE FLAP COMPUTER.

Data retrieved from NASA's ASRS site as of January 2009 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 CRJ200 on descent at 14000 ft declared an emergency due to overspd clacker unable to silence and 'flaps fail' message. Flaps failed full up. Landed with flaps fully retracted.