What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilot(s) failed to maintain approach procedures. Pilot(s) continued on a 127 degree flight path at the VOR b (coppertown) readial instead of coordinating a 30 degree left-hand turn at this VOR for approach into Butte (kbtm), Montana, at a 97 degree flight path. Controlled flight into terrain at 127 degree flight path.
As the FAA filed it
(-23) PILOT(S) FAILED TO MAINTAIN APPROACH PROCEDURES. PILOT(S) CONTINUED ON A 127 DEGREE FLIGHT PATH AT THE VOR B (COPPERTOWN) READIAL INSTEAD OF COORDINATING A 30 DEGREE LEFT-HAND TURN AT THIS VOR FOR APPROACH INTO BUTTE (KBTM), MONTANA, AT A 97 DEGREE FLIGHT PATH. CONTROLLED FLIGHT INTO TERRAIN AT 127 DEGREE FLIGHT PATH.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.