What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Squeal compressor stalls and smoke, flames from tail pipe. Lost all power and landed in clearing. Report to follow. (.4) the pilot reported that he had dropped off a load of chokers and was maneuvering to hook up to a load of logs when the engine began to make 'a weird squealing noise, followed by a constant series of compressor stalls, occurring about twice per second.' The airplane then lost all engine power, and the pilot performed a forced landing in a clearing. Post crash examination revealed that the no. 1 bearing (p/n:1-300-015-04; s/n:127AC) was heavily damaged. From observations of damage on the bearing raceways and the inner ring split faces, evidence indicated that both thrust and non-thrust sides of the inner ring had been misaligned, based upon ball path indications. Military records for the engine included an unserviceable tag. No evidence was found of specifics related to that failure code, nor was evidence found recording related corrective maintenance action
As the FAA filed it
SQUEAL COMPRESSOR STALLS AND SMOKE, FLAMES FROM TAIL PIPE. LOST ALL POWER AND LANDED IN CLEARING. REPORT TO FOLLOW. (.4) THE PILOT REPORTED THAT HE HAD DROPPED OFF A LOAD OF CHOKERS AND WAS MANEUVERING TO HOOK UP TO A LOAD OF LOGS WHEN THE ENGINE BEGAN TO MAKE 'A WEIRD SQUEALING NOISE, FOLLOWED BY A CONSTANT SERIES OF COMPRESSOR STALLS, OCCURRING ABOUT TWICE PER SECOND.' THE AIRPLANE THEN LOST ALL ENGINE POWER, AND THE PILOT PERFORMED A FORCED LANDING IN A CLEARING. POST CRASH EXAMINATION REVEALED THAT THE NO. 1 BEARING (P/N:1-300-015-04; S/N:127AC) WAS HEAVILY DAMAGED. FROM OBSERVATIONS OF DAMAGE ON THE BEARING RACEWAYS AND THE INNER RING SPLIT FACES, EVIDENCE INDICATED THAT BOTH THRUST AND NON-THRUST SIDES OF THE INNER RING HAD BEEN MISALIGNED, BASED UPON BALL PATH INDICATIONS. MILITARY RECORDS FOR THE ENGINE INCLUDED AN UNSERVICEABLE TAG. NO EVIDENCE WAS FOUND OF SPECIFICS RELATED TO THAT FAILURE CODE, NOR WAS EVIDENCE FOUND RECORDING RELATED CORRECTIVE MAINTENANCE ACTION
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N98NW · 1
Matched to the same aircraft by N-number and date.