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A air carrier on approach to spim on the ILS to runway 15 experienced two instances of localizer and glide slope disruption.
| Attributes | |
| ACN | 893299 |
| Time | |
| Date | 201006 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SPIM.Airport |
| State Reference | FO |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Speed All Types Deviation - Track / Heading All Types |
Narrative:
ILS erroneous indication on approach. Descending out of 3;000 ft on approach to runway 15 at spim with localizer and glideslope captured; flaps 5; gear up; speed 190 KTS; autopilot on. Inbound to dalna; the aircraft pitched down and the airspeed started to increase. Autopilot was disconnected; airspeed within limits (220 KTS) for the flap five configuration. Approach was continued manually; glideslope and localizer indications returned to normal until just inbound from dalna; at which point the glideslope pitched up and the localizer deviated to the right (climbing right turn indication). The current flight path was held manually; airplane was at flaps 20; gear down and airspeed 180 KTS. Once again; the glideslope and localizer indications returned to normal and we broke out of the weather at 1;200 ft; however; this delayed final configuration flaps 25 (1;100 ft) and shortly thereafter flaps 30 were selected at 800 ft. Stabilized and visual at 500 ft; approach continued to an uneventful landing.
Original NASA ASRS Text
Title: A air carrier on approach to SPIM on the ILS to Runway 15 experienced two instances of localizer and glide slope disruption.
Narrative: ILS erroneous indication on approach. Descending out of 3;000 FT on approach to Runway 15 at SPIM with localizer and glideslope captured; flaps 5; gear up; speed 190 KTS; autopilot on. Inbound to DALNA; the aircraft pitched down and the airspeed started to increase. Autopilot was disconnected; airspeed within limits (220 KTS) for the flap five configuration. Approach was continued manually; glideslope and localizer indications returned to normal until just inbound from DALNA; at which point the glideslope pitched up and the localizer deviated to the right (climbing right turn indication). The current flight path was held manually; airplane was at flaps 20; gear down and airspeed 180 KTS. Once again; the glideslope and localizer indications returned to normal and we broke out of the weather at 1;200 FT; however; this delayed final configuration flaps 25 (1;100 FT) and shortly thereafter flaps 30 were selected at 800 FT. Stabilized and visual at 500 FT; approach continued to an uneventful landing.
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.