As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 ENGINE LOST OIL QUANTITY. SHUT DOWN ENGINE PER AOM ABNORMAL PROCEDURES. REMOVED NR 4 STARTER TO INSPECT DRIVE SHAFT AREA FOR DAMAGE. FOUND GARLOCK SEAL LEAKING PAST INTERNAL SEAL. REMOVED AND REPLACED GARLOCK SEAL AND INTERNAL SPACER. RAN NR 4 ENGINE PER JRH CHAPTER 10-01-01. NO LEAKS NOTED.