Narrative:

At FL370 cruise altitude, a 'proximity sensor' status message occurred. Noise from nose gear area and assumed sound of gear door or uplock trying to cycle was heard. Captain continued to fly aircraft and I used ATC radio to contact dispatch, who in turn patched me through to maintenance. During this patch, a red mater caution, gear disagreement appeared and went away. Same sound as before was heard. Throughout the patch, this happened 3 times. A diversion was necessary so we diverted to cmh, an emergency was declared instructed by maintenance. QRH procedure for gear disagreement was performed and a normal approach and landing followed. Crash fire rescue equipment was notified and was standing by for precautionary measures. Aircraft was taxied off runway and gear pins were installed. Aircraft was taxied to gate with no further incidents. Callback conversation with reporter revealed the following information: the first officer did not know the causes of the event. The first officer stated that the proximity sensor is related to the sensing magnets located on key position on the gear and the gear doors. They sense the respective relationships of one to the other and are involved in the sequencing schedules of the gear and the gear doors. Not knowing if the gear doors would open at a high speed, the crew elected for an immediate diversion after conferring with maintenance controller. Reporter advised he would attempt to get a readout from company's maintenance department.

Related reports:

Google
 

Original NASA ASRS Text

Title: DIVERSION TO CMH AFTER EMER DECLARATION BY THE CREW OF A CRJ 700 WHEN RECEIVING SPURIOUS SIGNALS FROM THEIR GEAR WARNING SYS NEAR HVQ, WV.

Narrative: AT FL370 CRUISE ALT, A 'PROX SENSOR' STATUS MESSAGE OCCURRED. NOISE FROM NOSE GEAR AREA AND ASSUMED SOUND OF GEAR DOOR OR UPLOCK TRYING TO CYCLE WAS HEARD. CAPT CONTINUED TO FLY ACFT AND I USED ATC RADIO TO CONTACT DISPATCH, WHO IN TURN PATCHED ME THROUGH TO MAINT. DURING THIS PATCH, A RED MATER CAUTION, GEAR DISAGREEMENT APPEARED AND WENT AWAY. SAME SOUND AS BEFORE WAS HEARD. THROUGHOUT THE PATCH, THIS HAPPENED 3 TIMES. A DIVERSION WAS NECESSARY SO WE DIVERTED TO CMH, AN EMER WAS DECLARED INSTRUCTED BY MAINT. QRH PROC FOR GEAR DISAGREEMENT WAS PERFORMED AND A NORMAL APCH AND LNDG FOLLOWED. CFR WAS NOTIFIED AND WAS STANDING BY FOR PRECAUTIONARY MEASURES. ACFT WAS TAXIED OFF RWY AND GEAR PINS WERE INSTALLED. ACFT WAS TAXIED TO GATE WITH NO FURTHER INCIDENTS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE FO DID NOT KNOW THE CAUSES OF THE EVENT. THE FO STATED THAT THE PROX SENSOR IS RELATED TO THE SENSING MAGNETS LOCATED ON KEY POS ON THE GEAR AND THE GEAR DOORS. THEY SENSE THE RESPECTIVE RELATIONSHIPS OF ONE TO THE OTHER AND ARE INVOLVED IN THE SEQUENCING SCHEDULES OF THE GEAR AND THE GEAR DOORS. NOT KNOWING IF THE GEAR DOORS WOULD OPEN AT A HIGH SPD, THE CREW ELECTED FOR AN IMMEDIATE DIVERSION AFTER CONFERRING WITH MAINT CTLR. RPTR ADVISED HE WOULD ATTEMPT TO GET A READOUT FROM COMPANY'S MAINT DEPT.

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.