As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:PS2, THE CREW O2 BOTTLE NR 4 IS LOW PRESS AT THE BOTTLE AND READS APPROX 200 PSI LESS THAN THE REMOTE FLIGHT DEAC INDICATOR, LIMIT IS 150PSI DIFFERENCE). REMOVED AND REPLACED NR 4 O2 BOTTLE IAW MM CH 35-11-01. REPLACED COCKPI T O2 INDICATOR IAW MM CH 35-14-02 CKS NORMAL.