Corporate jet flight crew reported the aircraft descended below the cleared altitude while on autopilot which led to having to hand-fly the approach visually. The reporter noted that there were numerous aircraft that were reporting issues with the approach.
Synopsis
Corporate jet flight crew reported the aircraft descended below the cleared altitude while on autopilot which led to having to hand-fly the approach visually. The reporter noted that there were numerous aircraft that were reporting issues with the approach.
Narrative
While inbound to TEB to RNAV Y Runway 6; loaded into the FMS; we were direct to JUGGY intersection at an altitude of 3000. We were given a 090 heading to intercept the approach. That heading would intercept just outside of JUGGY so we requested lower; but told to maintain 3000. Prior to intercepting the inbound course we were given a descent to 2000 with the approach armed with VNAV selected. LPV mins entered. The approach activated and flight director was confirmed. We received a CHK SBAS SVC PRVDR alert. We also noticed the aircraft was descending below 2000. I disconnected the autopilot and stopped the descent whilst at the same time NY Approach called out our altitude. We climbed back to 2000 and hand-flew the approach visually. We also received a red VNAV flag on the PFD (Primary Flight Display). On the ground we heard numerous aircraft reporting issues with the WAAS (Wide Area Augmentation System) approach to Ground Control. Several flight crews mentioned the presence of high solar activity may be interfering with the WAAS.
Second reporter narrative
[Report narrative contained no additional information.]
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.