Narrative:

Climbing through 8000 ft, loud, rapid, clunking noise began from the nosewheel well area. I told the first officer, the PF, to disconnect the autoplt, slow the aircraft down and level off. We had no caution or warning messages and no indications of a problem. I pulled up and checked all EICAS pages with special attention to hydraulics, flight controls, and doors pages. Our flight attendant called asking if we knew of the noise and passenger concerns. I told him we were handling the problem and would get back to him as soon as we could. I found nothing abnormal with the aircraft, using all of the indications available. I feared we may have a nose gear door separating from the aircraft. I declared an emergency with mem and requested a return to mem. We ran through all normal checklists and notified the flight attendant and passenger of the situation and the return to mem. We landed with no problems. I advised the first officer to take it was easy on landing and easy on brakes using maximum reverse thrust and letting the aircraft roll to the end of the runway. We had no further incident so I canceled the emergency and taxied to the gate. Maintenance found a hydraulic valve for the nose landing gear doors at fault. Maintenance changed the valve. We ferried the aircraft home with no problems. Callback conversation with reporter revealed the following information: the reporter had experience a gear door separation in his background. The noise stopped after a time which led to the assumption that this could be the situation again.

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Original NASA ASRS Text

Title: CRJ-200 HAS NOISE IN NOSEWHEEL AREA FROM AN UNDETERMINED SOURCE AFTER TKOF. MAINT DETERMINED THAT A VALVE FOR NOSE LNDG GEAR DOORS WAS AT FAULT.

Narrative: CLBING THROUGH 8000 FT, LOUD, RAPID, CLUNKING NOISE BEGAN FROM THE NOSEWHEEL WELL AREA. I TOLD THE FO, THE PF, TO DISCONNECT THE AUTOPLT, SLOW THE ACFT DOWN AND LEVEL OFF. WE HAD NO CAUTION OR WARNING MESSAGES AND NO INDICATIONS OF A PROB. I PULLED UP AND CHKED ALL EICAS PAGES WITH SPECIAL ATTN TO HYDS, FLT CTLS, AND DOORS PAGES. OUR FLT ATTENDANT CALLED ASKING IF WE KNEW OF THE NOISE AND PAX CONCERNS. I TOLD HIM WE WERE HANDLING THE PROB AND WOULD GET BACK TO HIM AS SOON AS WE COULD. I FOUND NOTHING ABNORMAL WITH THE ACFT, USING ALL OF THE INDICATIONS AVAILABLE. I FEARED WE MAY HAVE A NOSE GEAR DOOR SEPARATING FROM THE ACFT. I DECLARED AN EMER WITH MEM AND REQUESTED A RETURN TO MEM. WE RAN THROUGH ALL NORMAL CHKLISTS AND NOTIFIED THE FLT ATTENDANT AND PAX OF THE SIT AND THE RETURN TO MEM. WE LANDED WITH NO PROBS. I ADVISED THE FO TO TAKE IT WAS EASY ON LNDG AND EASY ON BRAKES USING MAX REVERSE THRUST AND LETTING THE ACFT ROLL TO THE END OF THE RWY. WE HAD NO FURTHER INCIDENT SO I CANCELED THE EMER AND TAXIED TO THE GATE. MAINT FOUND A HYD VALVE FOR THE NOSE LNDG GEAR DOORS AT FAULT. MAINT CHANGED THE VALVE. WE FERRIED THE ACFT HOME WITH NO PROBS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR HAD EXPERIENCE A GEAR DOOR SEPARATION IN HIS BACKGROUND. THE NOISE STOPPED AFTER A TIME WHICH LED TO THE ASSUMPTION THAT THIS COULD BE THE SIT AGAIN.

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.