Pratt & Whitney recently released SB30393, recommending that the Electronic Engine Control (EEC) support brackets be replaced within 300 hours to help eliminate problems due to vibratory stresses.
Honeywell has introduced new N2 monopoles with internal enhancements that improve N2 monopole durability. But double-check the P/N of the N2 monopole to avoid signal issues.
A recent Astra SPX customer had incoming discrepancies for the #1 & #2 Engine DEEC buffers filling up every flight. Also, the thrust reversers weren’t deploying on touch down until about 80 knots. The main landing gear ground contact switches were to blame.
There have been some questions raised lately about the flap tracks on the Lear 40 series aircraft, particularly regarding the Perma Silk G coating.