As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- ON FLIGHT 4218 DURING TAXI OUT, THE NOSE STRUT BOTTOMED OUT. AIRCRAFT RETURNED TO THE GATE. MAINTENANCE SERVICED THE NOSE STRUT IAW AMM 12-12-32-610-803-A01. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.