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Air carrier pilot reports jfk ILS 31R DME morse code transmission is erratic; resulting in failure of FMS to identify the ILS.
| Attributes | |
| ACN | 869248 |
| Time | |
| Date | 201001 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | JFK.Airport |
| State Reference | NY |
| Aircraft 1 | |
| Make Model Name | Regional Jet CL65 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Component | |
| Aircraft Component | Air/Ground Communication |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Other / Unknown |
Narrative:
The ILS runway 31R DME morse code at jfk is intermittent. Every 3 or 4 repetitions it completes properly; but most of the time it stutters along the way and misses a dot or part of a dash here and there. This results in the FMS failing to automatically identification the ILS (it listens to the DME code for identification purposes). I verified this in several aircraft to rule out a reciever problem. I notified jfk tower of the problem; but he tried to verify it with a flight behind us and they reported no problems. Unfortunately I'm not sure they understood that we were specifically reporting only the DME morse code and may have checked the localizer DME or the ILS in general instead. As a result I am sure that ATC will ignore our report. Fix jfk ILS 31R DME morse code transmitter.
Original NASA ASRS Text
Title: Air Carrier Pilot reports JFK ILS 31R DME Morse Code transmission is erratic; resulting in failure of FMS to identify the ILS.
Narrative: The ILS Runway 31R DME morse code at JFK is intermittent. Every 3 or 4 repetitions it completes properly; but most of the time it stutters along the way and misses a dot or part of a dash here and there. This results in the FMS failing to automatically ID the ILS (it listens to the DME code for ID purposes). I verified this in several aircraft to rule out a reciever problem. I notified JFK tower of the problem; but he tried to verify it with a flight behind us and they reported no problems. Unfortunately I'm not sure they understood that we were specifically reporting only the DME morse code and may have checked the LOC DME or the ILS in general instead. As a result I am sure that ATC will ignore our report. Fix JFK ILS 31R DME morse code transmitter.
Data retrieved from NASA's ASRS site as of April 2012 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.