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Flight assist to GA pilot when unable to tie down his headings to intercept the localizer on an IAP ILS approach.
| Attributes | |
| ACN | 260483 |
| Time | |
| Date | 199401 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bna |
| State Reference | TN |
| Altitude | msl bound lower : 2000 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bna |
| Operator | general aviation : instructional |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude cruise other descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : cfi pilot : instrument |
| Experience | flight time last 90 days : 160 flight time total : 810 flight time type : 7 |
| ASRS Report | 260483 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : critical other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : provided flight assist controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Was gonna fly an airplane from bna to M02 (dickson). Got up XA20 am to check WX. WX looked good. Went to airport. ATIS reported 3300 scattered, 15000 ft broken. Called up clearance, they said bna was IFR. Got special VFR. In the climb, about 1500 ft, clouds were coming in from everywhere. Found a hole and got out on top between layers. Told controller that I was coming back to bna and requested local IFR clearance. Approach controller vectored me around for ILS to runway 2L. Put in the frequency, checked beacons, put markers up in speaker. Controller had me turn left 050 degrees, to intercept ILS for runway 2L. I had a right deflection of the localizer. Approximately 30 seconds later, controller told me I went through the localizer, but I still had right deflection. They had me turn to 350 degrees and the localizer slowly started moving. I thought that now finally the localizer is alive. A moment later the controller told me I went through the localizer again, this time to the left. My needle was now to the left. Now they turned me to 020 degrees and the needle was centered. I thought I was tracking the localizer now and lower asked me if I got the localizer. I replied, I think I got it now. When I broke out, I was on final for runway 2L. Problem: equipment malfunction when flown in rain. Passenger floor soaked. Talked to a guy about navigation failure and he said the same happened to him in the same airplane with his instructor. They were flying in rain and it quit, then worked, then quit. So, reason for bad ILS performance is due to navigation failure.
Original NASA ASRS Text
Title: FLT ASSIST TO GA PLT WHEN UNABLE TO TIE DOWN HIS HDGS TO INTERCEPT THE LOC ON AN IAP ILS APCH.
Narrative: WAS GONNA FLY AN AIRPLANE FROM BNA TO M02 (DICKSON). GOT UP XA20 AM TO CHK WX. WX LOOKED GOOD. WENT TO ARPT. ATIS RPTED 3300 SCATTERED, 15000 FT BROKEN. CALLED UP CLRNC, THEY SAID BNA WAS IFR. GOT SPECIAL VFR. IN THE CLB, ABOUT 1500 FT, CLOUDS WERE COMING IN FROM EVERYWHERE. FOUND A HOLE AND GOT OUT ON TOP BTWN LAYERS. TOLD CTLR THAT I WAS COMING BACK TO BNA AND REQUESTED LCL IFR CLRNC. APCH CTLR VECTORED ME AROUND FOR ILS TO RWY 2L. PUT IN THE FREQ, CHKED BEACONS, PUT MARKERS UP IN SPEAKER. CTLR HAD ME TURN L 050 DEGS, TO INTERCEPT ILS FOR RWY 2L. I HAD A R DEFLECTION OF THE LOC. APPROX 30 SECONDS LATER, CTLR TOLD ME I WENT THROUGH THE LOC, BUT I STILL HAD R DEFLECTION. THEY HAD ME TURN TO 350 DEGS AND THE LOC SLOWLY STARTED MOVING. I THOUGHT THAT NOW FINALLY THE LOC IS ALIVE. A MOMENT LATER THE CTLR TOLD ME I WENT THROUGH THE LOC AGAIN, THIS TIME TO THE L. MY NEEDLE WAS NOW TO THE L. NOW THEY TURNED ME TO 020 DEGS AND THE NEEDLE WAS CTRED. I THOUGHT I WAS TRACKING THE LOC NOW AND LOWER ASKED ME IF I GOT THE LOC. I REPLIED, I THINK I GOT IT NOW. WHEN I BROKE OUT, I WAS ON FINAL FOR RWY 2L. PROB: EQUIP MALFUNCTION WHEN FLOWN IN RAIN. PAX FLOOR SOAKED. TALKED TO A GUY ABOUT NAV FAILURE AND HE SAID THE SAME HAPPENED TO HIM IN THE SAME AIRPLANE WITH HIS INSTRUCTOR. THEY WERE FLYING IN RAIN AND IT QUIT, THEN WORKED, THEN QUIT. SO, REASON FOR BAD ILS PERFORMANCE IS DUE TO NAV FAILURE.
Data retrieved from NASA's ASRS site as of July 2007 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.