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A319 flight crew reports that FMGC automatic tuning of bos runway 4R ILS does not produce correct frequency. Flight crew descends to VMC conditions and lands visually.
| Attributes | |
| ACN | 767359 |
| Time | |
| Date | 200712 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : bos.airport |
| State Reference | MA |
| Altitude | agl single value : 1600 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Rain |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : a90.tracon tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer pilot : multi engine |
| Experience | flight time last 90 days : 200 flight time total : 23000 flight time type : 600 |
| ASRS Report | 767359 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 800 flight time type : 400 |
| ASRS Report | 767360 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued alert none taken : anomaly accepted other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
ILS frequency was wrong on approach into bos 109.9 indicated for 110.3 was supposed to be indicated for ILS approach into runway 4R for bos. Problem occurred on approach with ILS and GS armed. Wrong frequency noticed with momentary indication of purple localizer intercept indicated. Pilot switched back to navigation but by the time field was in sight. Tower indicated aircraft was below GS at miltt but aircraft was level and tracking to cross miltt at recommended altitude. ILS frequency 109.9 happens to coincide with dca 18 which was aircraft departure point. Callback conversation with reporter revealed the following information: the problem was apparently corrected by maintenance with a software reload into the FMGC. More diligence during the approach briefing would have caught this discrepancy.
Original NASA ASRS Text
Title: A319 FLT CREW REPORTS THAT FMGC AUTO TUNING OF BOS RWY 4R ILS DOES NOT PRODUCE CORRECT FREQUENCY. FLT CREW DESCENDS TO VMC CONDITIONS AND LANDS VISUALLY.
Narrative: ILS FREQ WAS WRONG ON APCH INTO BOS 109.9 INDICATED FOR 110.3 WAS SUPPOSED TO BE INDICATED FOR ILS APCH INTO RWY 4R FOR BOS. PROB OCCURRED ON APCH WITH ILS AND GS ARMED. WRONG FREQ NOTICED WITH MOMENTARY INDICATION OF PURPLE LOC INTERCEPT INDICATED. PLT SWITCHED BACK TO NAV BUT BY THE TIME FIELD WAS IN SIGHT. TWR INDICATED ACFT WAS BELOW GS AT MILTT BUT ACFT WAS LEVEL AND TRACKING TO CROSS MILTT AT RECOMMENDED ALT. ILS FREQ 109.9 HAPPENS TO COINCIDE WITH DCA 18 WHICH WAS ACFT DEP POINT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE PROBLEM WAS APPARENTLY CORRECTED BY MAINTENANCE WITH A SOFTWARE RELOAD INTO THE FMGC. MORE DILIGENCE DURING THE APPROACH BRIEFING WOULD HAVE CAUGHT THIS DISCREPANCY.
Data retrieved from NASA's ASRS site as of January 2009 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.