Commercial Fixed Wing
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 27
Situational Awareness; Confusion
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance
Human Factors
Aircraft X AT 10;000 feet northwest of LHS on the BFL FASTO2 ARRIVAL; LHS TRANSITION. A faster aircraft was overtaking 10;000 feet; so I coordinated with BFL TRACON to descend Aircraft X to 9;000 feet. My belief being that the MEA on that route segment was 9;000 feet. However; immediately after issuing 9;000 feet I had doubts and looked at the FASTO TWO chart and saw that the MEA is 10;000 feet; so I climbed Aircraft X back to 10;000 feet. The lowest altitude I observed Aircraft X MODE C; was 9;500 feet.
Los Angeles Center Controller reported descending an aircraft below the Minimum En route Altitude.