Can you flex if FMS 1 and 2 are INOP?

Flex thrust refers to a reduced thrust setting that can be used during takeoff to optimize engine performance and save fuel, especially in non-abnormal conditions. If both Thrust Management Systems, FMS 1 and FMS 2, are Inoperative (INOP), this may limit the ability to use standard methods to initiate flex thrust.

When using the EICAS control panel, it's possible to access the EICAS menu page to manually configure the thrust settings as needed. This approach allows pilots to circumvent the limitations imposed by the INOP status of the Flight Management Systems. Essentially, this access enables them to enter the required parameters directly, ensuring that the flight can continue with appropriate thrust settings despite the indicated system failures.

Thus, the ability to flex thrust through the EICAS control panel demonstrates the flexibility of pilot controls and manual overrides in situations where automated systems are not functioning optimally.