Narrative:

We were being vectored for the ILS 36C at cvg while in night IMC conditions. The aircraft was level at 3;000 ft; heading of 270. ATC advised us to slow to 180 KTS or slower. I retarded the thrust levers; and at around 230 KTS; the gear horn sounded. At the same time; the GPWS annunciated 'terrain; terrain; pull up.' I brought the power forward; and immediately both indications disappeared. We determined that this must have been a malfunction; so we attempted to decelerate to meet the ATC instruction. Once slowing below 200 KTS; the gear horn sounded again. ATC gave us a turn to join the localizer; and then cleared us for the approach. As we captured the localizer; the glideslope became unreliable. When the aircraft received the glideslope; the aircraft was not yet in a position to intercept the glideslope. However; the autopilot captured the glideslope; and climbed to intercept it. At this point; we received the GPWS 'terrain' alert again. The captain called for a go-around. We alerted ATC that we were going around due to inability to receive the glideslope; and were given vectors for 36L. After the go-around; we reconfigured for the ILS 36L. From this point on; we received no further alerts regarding the gear horn; or from the gwps. We landed on 36L without incident.the event occurred due to a malfunction of the GPWS. We noticed that the left side RA was showing erratic indications while the alerts were present. It is likely that this inaccurate information led to the false alerts. These alerts created a serious distraction; which hindered my ability to hear and communicate with my captain. My captain did a great job of evaluating the indications; and in the execution of the go-around. Despite the distractions; he stayed focused on the procedure of the go-around; and his control of the situation made my job significantly easier.

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Original NASA ASRS Text

Title: CRJ200 flight crew experiences gear and GPWS warnings during vectors for an ILS approach in night IMC. The warnings are initially ignored due to indications that the Captain's radar atimeter is erratic. When the glideslope appears unstable the crew elects to go around and use a different ILS approach.

Narrative: We were being vectored for the ILS 36C at CVG while in night IMC conditions. The aircraft was level at 3;000 FT; heading of 270. ATC advised us to slow to 180 KTS or slower. I retarded the thrust levers; and at around 230 KTS; the Gear Horn sounded. At the same time; the GPWS annunciated 'Terrain; Terrain; Pull Up.' I brought the power forward; and immediately both indications disappeared. We determined that this must have been a malfunction; so we attempted to decelerate to meet the ATC instruction. Once slowing below 200 KTS; the Gear Horn sounded again. ATC gave us a turn to join the localizer; and then cleared us for the approach. As we captured the localizer; the glideslope became unreliable. When the aircraft received the glideslope; the aircraft was not yet in a position to intercept the glideslope. However; the autopilot captured the glideslope; and climbed to intercept it. At this point; we received the GPWS 'Terrain' alert again. The Captain called for a go-around. We alerted ATC that we were going around due to inability to receive the glideslope; and were given vectors for 36L. After the go-around; we reconfigured for the ILS 36L. From this point on; we received no further alerts regarding the Gear Horn; or from the GWPS. We landed on 36L without incident.The event occurred due to a malfunction of the GPWS. We noticed that the left side RA was showing erratic indications while the alerts were present. It is likely that this inaccurate information led to the false alerts. These alerts created a serious distraction; which hindered my ability to hear and communicate with my Captain. My Captain did a great job of evaluating the indications; and in the execution of the go-around. Despite the distractions; he stayed focused on the procedure of the go-around; and his control of the situation made my job significantly easier.

Data retrieved from NASA's ASRS site as of July 2013 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.