What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Flight profile: local proficiency flight (S50 – kcls – kplu – S50)
Location: Auburn airport (S50)
Description: while returning from a multi-leg local proficiency flight (S50 – kcls – kplu), the pilot encountered a high-density traffic pattern and heavy radio communications upon arrival at Auburn airport (S50). The resulting task saturation distracted the pilot, causing him to omit the before-landing checklist. Concurrently, a mechanical anomaly occurred wherein the aircraft’s landing gear "not down and locked" warning horn failed to activate. Without the checklist verification or an auditory backup, the pilot failed to extend the landing gear, resulting in a gear-up landing.
As the FAA filed it
FLIGHT PROFILE: LOCAL PROFICIENCY FLIGHT (S50 – KCLS – KPLU – S50)
LOCATION: AUBURN AIRPORT (S50)
DESCRIPTION: WHILE RETURNING FROM A MULTI-LEG LOCAL PROFICIENCY FLIGHT (S50 – KCLS – KPLU), THE PILOT ENCOUNTERED A HIGH-DENSITY TRAFFIC PATTERN AND HEAVY RADIO COMMUNICATIONS UPON ARRIVAL AT AUBURN AIRPORT (S50). THE RESULTING TASK SATURATION DISTRACTED THE PILOT, CAUSING HIM TO OMIT THE BEFORE-LANDING CHECKLIST. CONCURRENTLY, A MECHANICAL ANOMALY OCCURRED WHEREIN THE AIRCRAFT’S LANDING GEAR "NOT DOWN AND LOCKED" WARNING HORN FAILED TO ACTIVATE. WITHOUT THE CHECKLIST VERIFICATION OR AN AUDITORY BACKUP, THE PILOT FAILED TO EXTEND THE LANDING GEAR, RESULTING IN A GEAR-UP LANDING.