When the L or R F FLTR BYPASS annunciator indicates a clogged filter, what is the recommended crew action?

When the L or R F FLTR BYPASS annunciator indicates a clogged filter, what is the recommended crew action?

• A. Precautionary landing advisable at the nearest suitable airport.
• B. Continue flight
• C. Perform emergency descent
• D. Increase fuel flow

Answer: (A)

When the L or R F FLTR BYPASS annunciator shows a clogged fuel filter, the fuel is no longer being filtered and the engine is at risk from contaminants reaching the fuel injectors. The safest action is to land at the nearest suitable airport to service or replace the filter and restore proper filtration. Continuing flight could lead to fuel contamination or fuel starvation and potential engine damage, so it’s not advisable. An emergency descent isn’t related to this fault, and increasing fuel flow won’t solve the filtration issue.

When the L or R F FLTR BYPASS annunciator shows a clogged fuel filter, the fuel is no longer being filtered and the engine is at risk from contaminants reaching the fuel injectors. The safest action is to land at the nearest suitable airport to service or replace the filter and restore proper filtration. Continuing flight could lead to fuel contamination or fuel starvation and potential engine damage, so it’s not advisable. An emergency descent isn’t related to this fault, and increasing fuel flow won’t solve the filtration issue.