09/01/2026
The SEAL Aviation team performing a service bulletin modification the requires inspection of the aileron leading edge for corrosion and the installation of additional drainage. Bombardier has released the following Service Bulletins for Learjet aircraft:
SB45-27-53 S/N 45-005 thru 45-200
SB45-27-54 S/N 45-201+
SB40-27-37 All Learjet 40
SB70-27-07 All Learjet 70
SB75-27-06 All Learjet 75
These service bulletins require inspection of the aileron leading edge for corrosion and the installation of a drainage modification to help prevent future corrosion. SEAL Aviation is uniquely qualified to perform this work through our comprehensive in-house Structural Repair, Fuel Tank Sealing, and Non-Destructive Testing (NDT) capabilities. To further minimize aircraft downtime, SEAL Aviation has acquired a set of donor ailerons that can be installed while your original ailerons undergo inspection, repair, and modification, allowing your aircraft to remain in service throughout the maintenance process.