|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0001 To 0600|
|Locale Reference||airport : crq|
|Altitude||msl bound lower : 2300|
msl bound upper : 2300
|Controlling Facilities||tracon : san|
|Operator||general aviation : personal|
|Make Model Name||Small Aircraft, Low Wing, 1 Eng, Retractable Gear|
|Flight Phase||descent : approach|
|Route In Use||enroute : on vectors|
|Function||flight crew : single pilot|
|Qualification||pilot : private|
pilot : instrument
|Affiliation||government : faa|
|Function||controller : approach|
|Qualification||controller : radar|
|Anomaly||aircraft equipment problem : less severe|
other spatial deviation
|Independent Detector||other controllera|
other flight crewa
|Resolutory Action||controller : issued new clearance|
|Air Traffic Incident||other|
It was a night flight from las vegas in 6/88 and a passenger and I took off from mc carran field at XA19 pm on an IFR flight plan bound for palomar airport, carlsbad, ca. Everything went well for a while and then the microphone on the headset stopped functioning. We had a spare microphone so I substituted this and it worked fine. The second radio had a bad switch and it worked intermittently, so I used our hand held portable radio which had radial readouts and it worked fine until the battery went low. The night was quite clear and visibility was unlimited until we reached palomar where there seemed to be an overcast. I asked for ILS R24 approach and asked the woman controller for help in identing the intxns because of the intermittent second radio, and she gave me vectors to the final approach course. I set my #1 radio to 108.7, the ILS course, and followed her vectors. She notified me when I was on the localizer course, but my needle on my HSI directed me to the right and would not center. The controller asked me to abandon the approach and try the VOR approach instead. I complied and shot the VOR a approach instead and when I turned inbound to the airport it was VFR. I still remained incredulous about the inaccuracy of the localizer because I had been using my #1 radio, a model X, that was old but very reliable in the past, and it had been checked just before the flight at palomar on the vot 109.0 and it was perfect. It had been tracking quite well on the VOR's that I was using en route. Could the controller have been off? I flew my passenger back to vegas the next day and on the return trip shot the ILS approach into mc clellan palomar with the controller monitoring me and much to my surprise, the same thing happened--I continued to get the strong fly right indication on the HSI. I now knew for sure that I had a defective radio and became extremely grateful for the fact that there is radar monitoring of approachs at palomar. In looking back I could have checked the localizer course with my #2 radio, but I did not really think of this. I think that in future ILS approachs, I will now set my #2 radio to the localizer course. We are also replacing our old model X with a new model Y and getting the switch fixed on the #2 radio. We are also adding a new LORAN C to our small aircraft. I hope that this report will be of some help to you as a safety consideration. Possible pilots could be warned not to have complete faith in their instruments and maybe have more trust in the controller--even if she is a woman!
Original NASA ASRS Text
Title: TRACK DEVIATION ON APCH GA SMA. EQUIPMENT MALFUNCTION.
Narrative: IT WAS A NIGHT FLT FROM LAS VEGAS IN 6/88 AND A PAX AND I TOOK OFF FROM MC CARRAN FIELD AT XA19 PM ON AN IFR FLT PLAN BOUND FOR PALOMAR ARPT, CARLSBAD, CA. EVERYTHING WENT WELL FOR A WHILE AND THEN THE MIC ON THE HEADSET STOPPED FUNCTIONING. WE HAD A SPARE MIC SO I SUBSTITUTED THIS AND IT WORKED FINE. THE SECOND RADIO HAD A BAD SWITCH AND IT WORKED INTERMITTENTLY, SO I USED OUR HAND HELD PORTABLE RADIO WHICH HAD RADIAL READOUTS AND IT WORKED FINE UNTIL THE BATTERY WENT LOW. THE NIGHT WAS QUITE CLEAR AND VIS WAS UNLIMITED UNTIL WE REACHED PALOMAR WHERE THERE SEEMED TO BE AN OVCST. I ASKED FOR ILS R24 APCH AND ASKED THE WOMAN CTLR FOR HELP IN IDENTING THE INTXNS BECAUSE OF THE INTERMITTENT SECOND RADIO, AND SHE GAVE ME VECTORS TO THE FINAL APCH COURSE. I SET MY #1 RADIO TO 108.7, THE ILS COURSE, AND FOLLOWED HER VECTORS. SHE NOTIFIED ME WHEN I WAS ON THE LOC COURSE, BUT MY NEEDLE ON MY HSI DIRECTED ME TO THE RIGHT AND WOULD NOT CENTER. THE CTLR ASKED ME TO ABANDON THE APCH AND TRY THE VOR APCH INSTEAD. I COMPLIED AND SHOT THE VOR A APCH INSTEAD AND WHEN I TURNED INBND TO THE ARPT IT WAS VFR. I STILL REMAINED INCREDULOUS ABOUT THE INACCURACY OF THE LOC BECAUSE I HAD BEEN USING MY #1 RADIO, A MODEL X, THAT WAS OLD BUT VERY RELIABLE IN THE PAST, AND IT HAD BEEN CHKED JUST BEFORE THE FLT AT PALOMAR ON THE VOT 109.0 AND IT WAS PERFECT. IT HAD BEEN TRACKING QUITE WELL ON THE VOR'S THAT I WAS USING ENRTE. COULD THE CTLR HAVE BEEN OFF? I FLEW MY PAX BACK TO VEGAS THE NEXT DAY AND ON THE RETURN TRIP SHOT THE ILS APCH INTO MC CLELLAN PALOMAR WITH THE CTLR MONITORING ME AND MUCH TO MY SURPRISE, THE SAME THING HAPPENED--I CONTINUED TO GET THE STRONG FLY RIGHT INDICATION ON THE HSI. I NOW KNEW FOR SURE THAT I HAD A DEFECTIVE RADIO AND BECAME EXTREMELY GRATEFUL FOR THE FACT THAT THERE IS RADAR MONITORING OF APCHS AT PALOMAR. IN LOOKING BACK I COULD HAVE CHKED THE LOC COURSE WITH MY #2 RADIO, BUT I DID NOT REALLY THINK OF THIS. I THINK THAT IN FUTURE ILS APCHS, I WILL NOW SET MY #2 RADIO TO THE LOC COURSE. WE ARE ALSO REPLACING OUR OLD MODEL X WITH A NEW MODEL Y AND GETTING THE SWITCH FIXED ON THE #2 RADIO. WE ARE ALSO ADDING A NEW LORAN C TO OUR SMA. I HOPE THAT THIS RPT WILL BE OF SOME HELP TO YOU AS A SAFETY CONSIDERATION. POSSIBLE PLTS COULD BE WARNED NOT TO HAVE COMPLETE FAITH IN THEIR INSTRUMENTS AND MAYBE HAVE MORE TRUST IN THE CTLR--EVEN IF SHE IS A WOMAN!
Data retrieved from NASA's ASRS site as of August 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.