What do MSP codes 997 and 998 indicate?

In the context of aircraft maintenance and operational procedures, MSP codes 997 and 998 specifically relate to hydraulic servicing requirements. When these codes are reported, they indicate that there is a need for servicing within the hydraulic systems of the aircraft, either in the right or left hydraulic system.

Understanding the importance of hydraulic systems is crucial, as they play a vital role in various aircraft operations, including landing gear operation, flight control surfaces, and braking systems. The necessity for proper hydraulic servicing ensures that these systems function correctly and efficiently, contributing significantly to flight safety and performance.

While the other options mention different aspects of aircraft maintenance—like minor adjustments, fuel system checks, or flight control checks—MSP codes 997 and 998 specifically highlight hydraulic issues, making the involvement of hydraulic servicing the most accurate interpretation of these codes.