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Flight crew of an atx light transport jet failed to report to the tower at the OM as directed by approach due to the lack of the ADF bearing indicator not showing that they had already passed the marker.
| Attributes | |
| ACN | 334230 |
| Time | |
| Date | 199604 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : yyz |
| State Reference | ON |
| Altitude | msl bound lower : 2000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : yyz tower : yyz |
| Operator | common carrier : air taxi |
| Make Model Name | Citation II S2/Bravo |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | other other : other pilot : cfi pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 117 flight time total : 11454 flight time type : 1475 |
| ASRS Report | 334230 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After being vectored to the ILS runway 24R at cyyz, toronto, arrival control instructed us to maintain 170 KTS to the xray NDB (on the ILS) and to contact the toronto tower over xray inbound. My first officer tuned in the xray NDB and verified reception. It appeared to be operating normally. Later, arrival control asked us if we had contacted the tower yet because we had passed xray. We explained to arrival control that for some reason we never got a needle reversal and so we were not certain when we passed xray. At this time the arrival controller coordination with the tower and cleared us to land on the arrival frequency. A later check revealed that our ADF receiver on our aircraft functioned normally. It's possible that our ADF antenna was ice covered and may have caused an erroneous reading over xray as we had encountered moderate icing conditions during the arrival phase into toronto only mins before joining the ILS.
Original NASA ASRS Text
Title: FLC OF AN ATX LTT JET FAILED TO RPT TO THE TWR AT THE OM AS DIRECTED BY APCH DUE TO THE LACK OF THE ADF BEARING INDICATOR NOT SHOWING THAT THEY HAD ALREADY PASSED THE MARKER.
Narrative: AFTER BEING VECTORED TO THE ILS RWY 24R AT CYYZ, TORONTO, ARR CTL INSTRUCTED US TO MAINTAIN 170 KTS TO THE XRAY NDB (ON THE ILS) AND TO CONTACT THE TORONTO TWR OVER XRAY INBOUND. MY FO TUNED IN THE XRAY NDB AND VERIFIED RECEPTION. IT APPEARED TO BE OPERATING NORMALLY. LATER, ARR CTL ASKED US IF WE HAD CONTACTED THE TWR YET BECAUSE WE HAD PASSED XRAY. WE EXPLAINED TO ARR CTL THAT FOR SOME REASON WE NEVER GOT A NEEDLE REVERSAL AND SO WE WERE NOT CERTAIN WHEN WE PASSED XRAY. AT THIS TIME THE ARR CTLR COORD WITH THE TWR AND CLRED US TO LAND ON THE ARR FREQ. A LATER CHK REVEALED THAT OUR ADF RECEIVER ON OUR ACFT FUNCTIONED NORMALLY. IT'S POSSIBLE THAT OUR ADF ANTENNA WAS ICE COVERED AND MAY HAVE CAUSED AN ERRONEOUS READING OVER XRAY AS WE HAD ENCOUNTERED MODERATE ICING CONDITIONS DURING THE ARR PHASE INTO TORONTO ONLY MINS BEFORE JOINING THE ILS.
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.