MD-80 Series (DC-9-80) Undifferentiated or Other Model
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types
Air Traffic Control Issued Advisory / Alert; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification
In the weather on a heading to intercept [Runway] 35C LOC; during turn onto LOC; LOC signal failed. Pilot Flying (PF) overturned LOC and started correcting. RAPCON; gave a correction and LOC came back. LOC failed again as we were intercepting for a second time. LOC continued to fail 3-4 times causing us to weave left and right on final. At about 5-6 miles we stabilized; finished the approach and landed uneventfully.
In the weather; we were turning left to intercept 35C localizer about 10 miles out and the localizer failed. Pilot Flying (PF) overturned a little and started correcting. RAPCON (127.07) gave us a correction and the localizer came back. We were intercepting and it failed again. It failed 3-4 times for a second or 2; causing us to weave down final. About 5-6 miles out we stabilized; finished the approach; and landed uneventfully. Not sure if we exited our corridor. The ID on the localizer (at 10-12 miles) was weak but readable with a lot of static. Usually DFW localizers are loud and clear out to 20 miles or more. I spoke with a RAPCON supervisor and he flagged our conversation on a note. He was very informative and helpful. He said they had been having sporadic problems with some DFW antennas. Using a Navigation overlay could help; but it can be a little off; also; even under normal circumstances.
On an ILS final approach; the crew of a MD-80 crew experienced an intermittent localizer signal. The crew landed safely after the help of ATC headings.