What was found
DURING TAKE OFF HIGH STAGE 1 VALVE FAILURE OCCURRED FOLLOWED QRH AND FLEW BELOW FL 250, NO INDICATION ON EICAS AT THIS MOMENT.
FACT 18MAY22 04:47 RIC R/R HIGH STAGE ORESSURE SWITCH IN REF TO AMM 35-11-07-000/400-801A.R/R RELAYS K0059 AND K0541 AND R/R HIGH STAGE VALVE IN REF TO AMM 36-11-02-000/400-801A. OPS CHECK GOOD.OK FOR SERVICE CLEAR MEL.