What was found
AIR TURNBACK, NR 1 CSD LOW OIL PRESSURE LIGHT ILLUMINATED. COMPLETED QRH CHECKLIST, APU WOULD NOT ACCEPT NR 1 GEN. REMOVED AND REPLACED CSD AND OIL COOLER PER MM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR TURNBACK, NR 1 CSD LOW OIL PRESSURE LIGHT ILLUMINATED. COMPLETED QRH CHECKLIST, APU WOULD NOT ACCEPT NR 1 GEN. REMOVED AND REPLACED CSD AND OIL COOLER PER MM.