What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) On October 20, 1999, at 1608E time, chqa flight 4335, a jetstream 31, s/n 732, N836JS, landed at pit runway 28C without incident after reporting a hyd problem. On approach to "hgr", the pilot noted that the hyd pressure was at 0 PSI and returned to the Pittsburgh airport. The aircraft landed and was towed to the gate without incident. Maintenance found a "b-nut" on the r/engine firewall chaffed through. The line was replaced and the sys serviced and bleed. The leak checks and op's checks were good. The aircraft was ferried to "hgr" for gearswings and final return to service. Investigation by desk audit and closed.
As the FAA filed it
(-23) ON OCTOBER 20, 1999, AT 1608E TIME, CHQA FLIGHT 4335, A JETSTREAM 31, S/N 732, N836JS, LANDED AT PIT RUNWAY 28C WITHOUT INCIDENT AFTER REPORTING A HYD PROBLEM. ON APPROACH TO "HGR", THE PILOT NOTED THAT THE HYD PRESSURE WAS AT 0 PSI AND RETURNED TO THE PITTSBURGH AIRPORT. THE AIRCRAFT LANDED AND WAS TOWED TO THE GATE WITHOUT INCIDENT. MAINTENANCE FOUND A "B-NUT" ON THE R/ENGINE FIREWALL CHAFFED THROUGH. THE LINE WAS REPLACED AND THE SYS SERVICED AND BLEED. THE LEAK CHECKS AND OP'S CHECKS WERE GOOD. THE AIRCRAFT WAS FERRIED TO "HGR" FOR GEARSWINGS AND FINAL RETURN TO SERVICE. INVESTIGATION BY DESK AUDIT AND CLOSED.