What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) A/c departed n. Las Vegas (vgt) airport at approx 1200 enroute to perfrom acrobatic airwork. A/c conducted preliminary inverted flight for evaluation and verification of inverted oil system after maintenance was performed on engine oil system (replaced/rerouted engine inverted oil system line). Pilot immediately noted oil pressure drop to zero. A/c returned to normal flight but oil pressure remained at zero. Pilot informed vgt tower of loss of oil pressure and performed precautionary landing on lone lountain rd approx 1 mile west of interstate 95. Maintenance bled engine oil system by removing oil pressure regulator and cranking engine until oil was observed. Engine runup was performed with normal oil pressure observed. A/c took off using cordoned off lone mountain rd and returned safely to vgt at approx 1515.
As the FAA filed it
(-23) A/C DEPARTED N. LAS VEGAS (VGT) AIRPORT AT APPROX 1200 ENROUTE TO PERFROM ACROBATIC AIRWORK. A/C CONDUCTED PRELIMINARY INVERTED FLIGHT FOR EVALUATION AND VERIFICATION OF INVERTED OIL SYSTEM AFTER MAINTENANCE WAS PERFORMED ON ENGINE OIL SYSTEM (REPLACED/REROUTED ENGINE INVERTED OIL SYSTEM LINE). PILOT IMMEDIATELY NOTED OIL PRESSURE DROP TO ZERO. A/C RETURNED TO NORMAL FLIGHT BUT OIL PRESSURE REMAINED AT ZERO. PILOT INFORMED VGT TOWER OF LOSS OF OIL PRESSURE AND PERFORMED PRECAUTIONARY LANDING ON LONE LOUNTAIN RD APPROX 1 MILE WEST OF INTERSTATE 95. MAINTENANCE BLED ENGINE OIL SYSTEM BY REMOVING OIL PRESSURE REGULATOR AND CRANKING ENGINE UNTIL OIL WAS OBSERVED. ENGINE RUNUP WAS PERFORMED WITH NORMAL OIL PRESSURE OBSERVED. A/C TOOK OFF USING CORDONED OFF LONE MOUNTAIN RD AND RETURNED SAFELY TO VGT AT APPROX 1515.