Narrative:

[We were] cleared for visual approach to runway 6 from (approximately) a 6 mile right downwind. [We] flew base over antenna tower. We had excellent visibility and clearly had adequate clearance both horizontally and vertically from antenna. We were well above the 2;200 ft glide slope altitude for the mcden final approach fix and descending to join the final approach just inside of mcden. We received an obstacle aural warning; possible vertical or horizontal separation from antenna. I suggest either fly a downwind that's not so far from the airport and closer to the final approach than the antenna towers or fly farther out on a longer downwind; turn base outside of the antenna towers and intercept the final approach a few miles outside of the mcden final approach fix as would be normally be done in IMC.

Google
 

Original NASA ASRS Text

Title: An Air Carrier crew reported an EGPWS alert from an antenna on a right base to final about six miles from BHM Runway 6.

Narrative: [We were] cleared for visual approach to Runway 6 from (approximately) a 6 mile right downwind. [We] flew base over antenna tower. We had excellent visibility and clearly had adequate clearance both horizontally and vertically from antenna. We were well above the 2;200 FT glide slope altitude for the MCDEN final approach fix and descending to join the final approach just inside of MCDEN. We received an obstacle aural warning; possible vertical or horizontal separation from antenna. I suggest either fly a downwind that's not so far from the airport and closer to the final approach than the antenna towers or fly farther out on a longer downwind; turn base outside of the antenna towers and intercept the final approach a few miles outside of the MCDEN final approach fix as would be normally be done in IMC.

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.