What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The instructor was regarded as "highly experienced, professional, and extremely safety conscious." The helicopter's tail moved from side to side and then it nosed over and impacted on its right side. It impacted in wise canal which feeds into rock creek reservoir approximately 100 yards downstream. Dive crews removed the occupant. The aircraft was removed the next day by a helicopter/sling operation. The wreckage was examined on 4-12-03. No obvious anomalies were noted by either the airframe or engine representatives. Some components were forwarded for further examination. One item of note is that the aft tube cluster fittings displayed corrosion in the lower ends of the tubes. Some tubes had lost as much as half their wall thickness (determined by naked eye and 10X glass). The most corroded tubes showed different failure indicators than the tubes with less corrosion. These cluster assemblies were also sent off for analysis. A safety recommendation will be made concerning the corrosion of these cluster assemblies. If any other information is received by this office this report will be revised.
As the FAA filed it
(-23) THE INSTRUCTOR WAS REGARDED AS "HIGHLY EXPERIENCED, PROFESSIONAL, AND EXTREMELY SAFETY CONSCIOUS." THE HELICOPTER'S TAIL MOVED FROM SIDE TO SIDE AND THEN IT NOSED OVER AND IMPACTED ON ITS RIGHT SIDE. IT IMPACTED IN WISE CANAL WHICH FEEDS INTO ROCK CREEK RESERVOIR APPROXIMATELY 100 YARDS DOWNSTREAM. DIVE CREWS REMOVED THE OCCUPANT. THE AIRCRAFT WAS REMOVED THE NEXT DAY BY A HELICOPTER/SLING OPERATION. THE WRECKAGE WAS EXAMINED ON 4-12-03. NO OBVIOUS ANOMALIES WERE NOTED BY EITHER THE AIRFRAME OR ENGINE REPRESENTATIVES. SOME COMPONENTS WERE FORWARDED FOR FURTHER EXAMINATION. ONE ITEM OF NOTE IS THAT THE AFT TUBE CLUSTER FITTINGS DISPLAYED CORROSION IN THE LOWER ENDS OF THE TUBES. SOME TUBES HAD LOST AS MUCH AS HALF THEIR WALL THICKNESS (DETERMINED BY NAKED EYE AND 10X GLASS). THE MOST CORRODED TUBES SHOWED DIFFERENT FAILURE INDICATORS THAN THE TUBES WITH LESS CORROSION. THESE CLUSTER ASSEMBLIES WERE ALSO SENT OFF FOR ANALYSIS. A SAFETY RECOMMENDATION WILL BE MADE CONCERNING THE CORROSION OF THESE CLUSTER ASSEMBLIES. IF ANY OTHER INFORMATION IS RECEIVED BY THIS OFFICE THIS REPORT WILL BE REVISED.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.