Narrative:

[We were] descending out of 10;000 ft to 5;000 ft on approach frequency in the clear above the clouds. Top layer of clouds was at 6;000 ft put anti-ice on before entering the clouds. As it was leveling off at 5;000 ft I check to see if we were picking up ice in the clouds; and we were not. Down wind flaps 1 and 210 KTS at 5;000 ft. Approach gave us a descent to 4;000 ft. I asked for flaps 5 and I put 190 KTS and started to descend. At that split second my airspeed (captain - pilot flying) went rapidly to '0' and I got the stick shaker. Autopilot -off; autothrottle- off; push power up; as power was coming up; stick shaker stopped. My airspeed was '0' and the first officer's airspeed was accelerating through 210 KTS. We were level and all 3 altimeters were the same. I transferred the aircraft to the first officer. Everything looked normal except my airspeed was '0'. I checked recall and no warnings. Weather at the airport was about 1;800 ft over cast and 4 miles. At this point we were 8 miles from airport on base leg to the approach ILS 23 which we were set up for. I was checking airspeed and altitude with the standby and the first officer's instruments. Everything looked good and ILS i-dent was good. I knew we would break out visual around the final approach fix. The plane was handling normal so we continued with the approach and broke out visual and landed with no problem. We got to the gate and called dispatch and maintenance. Contract maintenance was saying one of the pilot tubes on the captain's side was not heating.

Related reports:

Google
 

Original NASA ASRS Text

Title: A B737-400 Captain's pilot heat failed with no annunciator lights and caused his airspeed to indicate zero after entering clouds on approach at 4;000 FT. Aircraft control was transferred to the First Officer who flew and landed normally.

Narrative: [We were] descending out of 10;000 FT to 5;000 FT on Approach frequency in the clear above the clouds. Top layer of clouds was at 6;000 FT put anti-ice on before entering the clouds. As it was leveling off at 5;000 FT I check to see if we were picking up ice in the clouds; and we were not. Down wind flaps 1 and 210 KTS at 5;000 FT. Approach gave us a descent to 4;000 FT. I asked for flaps 5 and I put 190 KTS and started to descend. At that split second my airspeed (Captain - pilot flying) went rapidly to '0' and I got the stick shaker. Autopilot -OFF; autothrottle- OFF; push power up; as power was coming up; stick shaker stopped. My airspeed was '0' and the First Officer's airspeed was accelerating through 210 KTS. We were level and all 3 altimeters were the same. I transferred the aircraft to the First Officer. Everything looked normal except my airspeed was '0'. I checked recall and no warnings. Weather at the airport was about 1;800 FT over cast and 4 miles. At this point we were 8 miles from airport on base leg to the approach ILS 23 which we were set up for. I was checking airspeed and altitude with the standby and the First Officer's instruments. Everything looked good and ILS I-dent was good. I knew we would break out visual around the final approach fix. The plane was handling normal so we continued with the approach and broke out visual and landed with no problem. We got to the gate and called Dispatch and Maintenance. Contract Maintenance was saying one of the pilot tubes on the Captain's side was not heating.

Data retrieved from NASA's ASRS site as of April 2012 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.