As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING APPENDIX D PROCEDURE AFTER T/O, RT 10TH STAGE SOV WOULD NOT OPEN. LH PACK ON MEL AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED BLEED AIR SOV IAW AWAC SUPP 19-036 AND AMM AMM 36-11-04, PERFORMED OPS CHECK, BLEED LEAK CHECK IAW AWAC SUPP 99-015, OPS CK GOOD.