Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Workload; Distraction; Troubleshooting
Ground Event / Encounter Ground Equipment Issue; Inflight Event / Encounter Unstabilized Approach; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification
ATC Equipment / Nav Facility / Buildings
During the approach briefing for the ILS approach to Runway 15 at LCH; the First Officer (Pilot Flying); informed the Captain that he had problems with the Runway 15 localizer on two previous flights for this runway. The FO (First Officer) said that on both previous flights; the Runway 15 localizer did not stay centered. The FO explained the Localizer Course Deviation Indicator (CDI) had swung left and right of course. After discussing this; the Captain and FO agreed that the FO would remain on GPS guidance while the Captain would monitor on the localizer radio guidance. After being cleared for the approach; The FO intercepted the inbound course on GPS guidance. The Captain's localizer guidance initially appeared stable. Approximately three miles prior to the final approach fix; FIDGA; the FO switched his course guidance to the localizer. The approach guidance was stable. We passed FIDGA; intercepted the glide slope; and began our final descent. At approximately 1;300 feet MSL; the localizer began deviating left and right of course. The autopilot was engaged. The FO disengaged the autopilot and we immediately descended below the cloud ceiling; which was approximately 1;100 feet MSL or 1;200 feet MSL. The Captain and FO both sighted the runway at 1;100 feet MSL. At some point below 1;000 feet MSL; the localizer appeared to be stable. The remainder of the approach was uneventful. During the approach; the winds were 40 knots from approximately 200 degrees; prior to the FAF. After clearing the runway; we reported the problem to the Control Tower. The FO informed the Tower Controller he had problems with the Runway 15 localizer on two previous occasions. The Tower Controller said he had not received any other notifications about problems with the localizer from any other aircrews. At no point was the approach unstable. [Request] inspection of the localizer antenna. A query to the LCH Control Tower to determine if other aircrews have experienced the same problem. A notification in the daily read warning aircrews they might encounter the same problem.
Air carrier Captain reported problems with the localizer inbound to LCH.