Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 197; Flight Crew Total 3446; Flight Crew Type 342
Situational Awareness
Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Other / Unknown
Flight Crew Overcame Equipment Problem
Procedure; Airspace Structure; ATC Equipment / Nav Facility / Buildings
We received a different SID during descent than what was programmed into the FMC. At the same time the new SID was being loaded; the crew was dealing with GPS jamming that is common going into TLV and applying the procedures included in a pilot bulletin addressing this issue. The altitude restrictions on the ILS approach had been checked before the new SID was loaded. As the crew was reviewing the GPS jamming procedures; one of the relief pilots noticed the aircraft had descended 300 to 400 feet below an altitude restriction on the approach. The PF leveled the aircraft off; and all subsequent altitude restrictions were rechecked and met.
Airline First Officer reported experiencing GPS jamming while on approach to Ben Gurion Airport.