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First officer reported experiencing navigation and approach guidance problems due to GPS signal disruption.
| Attributes | |
| ACN | 1656264 |
| Time | |
| Date | 201906 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | LLLL.ARTCC |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | Heavy Transport |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | GPS & Other Satellite Navigation |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 207 Flight Crew Total 5160 Flight Crew Type 1397 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Track / Heading All Types Inflight Event / Encounter Unstabilized Approach |
Narrative:
Near the entry to the tlv fir enroute solis intersection for the gefin 1C STAR; EICAS for ads B left out; later received EICAS GPS right I assumed it was part of the israeli security measures. The ads EICAS kept returning after completing the non-normal checklist; it was distracting during a busy time. I noticed that the course deviation indicator on the pfd had turned amber; with rnp 1.0 anp 1.2 displayed. I advised ATC that anp was 1.25; and asked them to monitor our position. I advised ATC that anp was now 1.5; and asked them for radar vectors. The aircraft ahead of us had not reported any problems; but when approach control handed them off to tower; they advise the approach controller that radar factors would be recommended. ATC vectored us very tight on to the localizer; barely outside of the final approach fix. The auto pilot captured the localizer and south turned through the localizer before stabilizing. Altitude capture occurred at 3;400 feet the final approach fix altitude; before glide slope capture. We reached almost a dot high on the glide slope; then set altitude to 200 feet field elevation and selectived vertical speed -1000 to capture the glideslope. Conditions were cavoc; with the runway in sight; it was still daylight; but the approach and runway lights were on; appearing to be full bright. We met our requirements for the 1;500; 1;000; and 500 foot gates with a normal landing.
Original NASA ASRS Text
Title: First Officer reported experiencing navigation and approach guidance problems due to GPS signal disruption.
Narrative: Near the entry to the TLV FIR enroute SOLIS intersection for the Gefin 1C STAR; EICAS FOR ADS B L OUT; later received EICAS GPS R I assumed it was part of the Israeli security measures. The ADS EICAS kept returning after completing the non-normal checklist; it was distracting during a busy time. I noticed that the course deviation indicator on the PFD had turned amber; with RNP 1.0 ANP 1.2 displayed. I advised ATC that ANP was 1.25; and asked them to monitor our position. I advised ATC that ANP was now 1.5; and asked them for radar vectors. The aircraft ahead of us had not reported any problems; but when Approach Control handed them off to Tower; they advise the Approach Controller that radar factors would be recommended. ATC vectored us very tight on to the localizer; barely outside of the final approach fix. The auto pilot captured the localizer and S turned through the localizer before stabilizing. Altitude capture occurred at 3;400 feet the final approach fix altitude; before glide slope capture. We reached almost a dot high on the glide slope; then set altitude to 200 feet field elevation and selectived vertical speed -1000 to capture the glideslope. Conditions were CAVOC; with the runway in sight; it was still daylight; but the approach and runway lights were on; appearing to be full bright. We met our requirements for the 1;500; 1;000; and 500 foot gates with a normal landing.
Data retrieved from NASA's ASRS site 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.