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Pilot on IFR flight plan flies through localizer at mob twice when cleared to intercept because he had accidentally hit the frequency changeover switch on his navigation receiver while pressing the marker beacon button.
| Attributes | |
| ACN | 136069 |
| Time | |
| Date | 199002 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mob |
| State Reference | AL |
| Altitude | msl bound lower : 1900 msl bound upper : 1900 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mob |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Fixed Gear |
| Navigation In Use | ils localizer & glide slope : iate |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot oversight : pic |
| Qualification | pilot : private pilot : instrument |
| Experience | flight time last 90 days : 13 flight time total : 375 |
| ASRS Report | 136069 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : less severe other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Early in the approach I put in and idented the localizer in my navigation receiver. On the other side (not in use) of the FLIP-flop system, I had the brooklyn VOR frequency. Apparently when I pushed the marker beacon button I flipped the localizer out and the VOR 'in use.' when approaching the localizer, ATC said I had flown through the localizer and asked me if I wanted vectors for another approach, of if I wanted to try to recover. I asked for vectors. Although I was surprised that I could have gone through the localizer so quickly (I was approaching from northeast), the needle was appropriately swung to the far right when I looked. On making my second approach, the localizer needle was centered (but, of course on the brooklyn VOR, I was now approaching from the southwest), but I was not getting a line G/south. While pondering the problem, the needle swung far right just as ATC asked if I was getting good localizer reception. He immediately recommended that I climb and try again. I did, and immediately noticed the wrong frequency in use. The next approach went west/O incident. ATC did everything correctly, but I should have made one last identify just before localizer intercept.
Original NASA ASRS Text
Title: PLT ON IFR FLT PLAN FLIES THROUGH LOCALIZER AT MOB TWICE WHEN CLEARED TO INTERCEPT BECAUSE HE HAD ACCIDENTALLY HIT THE FREQ CHANGEOVER SWITCH ON HIS NAVIGATION RECEIVER WHILE PRESSING THE MARKER BEACON BUTTON.
Narrative: EARLY IN THE APCH I PUT IN AND IDENTED THE LOC IN MY NAV RECEIVER. ON THE OTHER SIDE (NOT IN USE) OF THE FLIP-FLOP SYS, I HAD THE BROOKLYN VOR FREQ. APPARENTLY WHEN I PUSHED THE MARKER BEACON BUTTON I FLIPPED THE LOC OUT AND THE VOR 'IN USE.' WHEN APCHING THE LOC, ATC SAID I HAD FLOWN THROUGH THE LOC AND ASKED ME IF I WANTED VECTORS FOR ANOTHER APCH, OF IF I WANTED TO TRY TO RECOVER. I ASKED FOR VECTORS. ALTHOUGH I WAS SURPRISED THAT I COULD HAVE GONE THROUGH THE LOC SO QUICKLY (I WAS APCHING FROM NE), THE NEEDLE WAS APPROPRIATELY SWUNG TO THE FAR RIGHT WHEN I LOOKED. ON MAKING MY SECOND APCH, THE LOC NEEDLE WAS CENTERED (BUT, OF COURSE ON THE BROOKLYN VOR, I WAS NOW APCHING FROM THE SW), BUT I WAS NOT GETTING A LINE G/S. WHILE PONDERING THE PROB, THE NEEDLE SWUNG FAR RIGHT JUST AS ATC ASKED IF I WAS GETTING GOOD LOC RECEPTION. HE IMMEDIATELY RECOMMENDED THAT I CLB AND TRY AGAIN. I DID, AND IMMEDIATELY NOTICED THE WRONG FREQ IN USE. THE NEXT APCH WENT W/O INCIDENT. ATC DID EVERYTHING CORRECTLY, BUT I SHOULD HAVE MADE ONE LAST IDENT JUST BEFORE LOC INTERCEPT.
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.