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As observed by a cockpit jump seater, an H25C crew while on an approach to tol, experienced an ILS localizer failure.
| Attributes | |
| ACN | 550040 |
| Time | |
| Date | 200206 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : tol.airport |
| State Reference | OH |
| Altitude | msl single value : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : tol.tower |
| Operator | general aviation : corporate |
| Make Model Name | BAe 125 Series 1000 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | ils localizer & glide slope : 25 other |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Function | observation : observer other personnel other |
| Qualification | pilot : multi engine pilot : instrument pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 30 flight time total : 300 flight time type : 0 |
| ASRS Report | 550040 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : loc flag other flight crewa other flight crewb other other : jump seater 1 |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | Navigational Facility Aircraft |
| Primary Problem | Navigational Facility |
Narrative:
I was riding jump seat in a hawker 1000. We were on the visual approach to runway 25 at tol. As per company sops, we were following the ILS in. About 5 mi out, we had a localizer failure on #2 FMS. It came back and failed again. After landing, we took a crew car into town for lunch. As we left the airport, we saw 2 police cars parked alongside the road near the airport boundary, possibly in the ILS critical area. Tol control tower has been advised and are checking to see if the ILS critical area extends that far. However, if the police were using radar guns, could that have interfered with the avionics? No one else had reported problems with the localizer and our equipment worked fine upon arriving back at bdl. Callback conversation with reporter revealed the following information: a conversation with the reporter revealed little more insight into the event, except to say the aircraft involved has had no further, ILS/localizer problems. Supplemental information: a system support center, (ssc) manager for tol, revealed that the 'ILS critical area' is well within the airport boundary and that ILS/localizer reliability should not be affected by activity conducted on the roadways adjacent to the airport.
Original NASA ASRS Text
Title: AS OBSERVED BY A COCKPIT JUMP SEATER, AN H25C CREW WHILE ON AN APCH TO TOL, EXPERIENCED AN ILS LOC FAILURE.
Narrative: I WAS RIDING JUMP SEAT IN A HAWKER 1000. WE WERE ON THE VISUAL APCH TO RWY 25 AT TOL. AS PER COMPANY SOPS, WE WERE FOLLOWING THE ILS IN. ABOUT 5 MI OUT, WE HAD A LOC FAILURE ON #2 FMS. IT CAME BACK AND FAILED AGAIN. AFTER LNDG, WE TOOK A CREW CAR INTO TOWN FOR LUNCH. AS WE LEFT THE ARPT, WE SAW 2 POLICE CARS PARKED ALONGSIDE THE ROAD NEAR THE ARPT BOUNDARY, POSSIBLY IN THE ILS CRITICAL AREA. TOL CTL TWR HAS BEEN ADVISED AND ARE CHKING TO SEE IF THE ILS CRITICAL AREA EXTENDS THAT FAR. HOWEVER, IF THE POLICE WERE USING RADAR GUNS, COULD THAT HAVE INTERFERED WITH THE AVIONICS? NO ONE ELSE HAD RPTED PROBS WITH THE LOC AND OUR EQUIP WORKED FINE UPON ARRIVING BACK AT BDL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: A CONVERSATION WITH THE RPTR REVEALED LITTLE MORE INSIGHT INTO THE EVENT, EXCEPT TO SAY THE ACFT INVOLVED HAS HAD NO FURTHER, ILS/LOC PROBS. SUPPLEMENTAL INFO: A SYS SUPPORT CTR, (SSC) MGR FOR TOL, REVEALED THAT THE 'ILS CRITICAL AREA' IS WELL WITHIN THE ARPT BOUNDARY AND THAT ILS/LOC RELIABILITY SHOULD NOT BE AFFECTED BY ACTIVITY CONDUCTED ON THE ROADWAYS ADJACENT TO THE ARPT.
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.