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Following the loss of ILS guidance on two attempted approaches at their destination; the flight crew of a B717-200 diverted to their alternate where the weather permitted them to perform a successful GPS approach.
| Attributes | |
| ACN | 975867 |
| Time | |
| Date | 201110 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Tower |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B717 (Formerly MD-95) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | ILS/VOR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Inflight Event / Encounter Fuel Issue Inflight Event / Encounter Weather / Turbulence |
Narrative:
We were cleared for the ILS approach to runway xxr; intercepted and track the localizer and G/south until approximately 400 AGL where the autopilot disconnected. I noticed we had no localizer guidance and the frequency for the localizer was missing so we executed a missed approach and were cleared to climb to 4000 ft and maintain runway heading. We asked ATC if there were any issues with the localizer frequency from previous aircraft and he responded 'no'. So we elected to try another approach to ILS runway xxl. The ILS was the only option due to low visibility and ceilings. As we were approaching the outer marker the autopilot again disconnected and we lost localizer guidance and the frequency display. We executed a missed approach and due to 'bingo' fuel and deteriorating weather we elected to proceed to our alternate where the weather was such that we could do a GPS approach and land safely. We did so and the flight ended without further event.
Original NASA ASRS Text
Title: Following the loss of ILS guidance on two attempted approaches at their destination; the flight crew of a B717-200 diverted to their alternate where the weather permitted them to perform a successful GPS approach.
Narrative: We were cleared for the ILS approach to Runway XXR; intercepted and track the LOC and G/S until approximately 400 AGL where the autopilot disconnected. I noticed we had no LOC guidance and the frequency for the LOC was missing so we executed a missed approach and were cleared to climb to 4000 FT and maintain runway heading. We asked ATC if there were any issues with the LOC frequency from previous aircraft and he responded 'no'. So we elected to try another approach to ILS Runway XXL. The ILS was the only option due to low visibility and ceilings. As we were approaching the outer marker the autopilot again disconnected and we lost LOC guidance and the frequency display. We executed a missed approach and due to 'bingo' fuel and deteriorating weather we elected to proceed to our alternate where the weather was such that we could do a GPS approach and land safely. We did so and the flight ended without further event.
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.