What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On 6-10-2024 during an instruction flight at 3000' MSL, the aircraft’s engine began vibrating violently and experienced a loss of oil pressure. The flight instructor decided to land the aircraft immediately and determined they could not make the nearest airfield (ksvh) located approximately 5 miles south of their position. A nearby field was selected and the engine was shut off once the aircraft was within landing distance of the field. The aircraft landed without incident.
Upon inspection of the aircraft’s engine, it was discovered that one half of one of the propeller blades was missing from the 2 bladed mccauley 1A170E/JHA7660 fixed-pitch propeller serial number APC23047. A search for the missing piece was conducted but never found. The remaining portion of the propeller was removed from the aircraft. Initial inspections indicated damage at the point of failure from a possible foreign object and/or corrosion.
The propeller was sent to mccauley propeller systems for further examination. That examination confirmed that a surface gouge near the trailing edge was the initiation point of the fatigue crack that grew until the remaining material could not hold, resulting in an overload failure and departure of the blade tip. The time scale between crack initiation and blade failure could not be determined.
NTSB did not investigate this incident due to lack of damage to the aircraft, therefore no NTSB number was added at block 5.
Reference sas task T-EA68-FY24-1340
As the FAA filed it
ON 6-10-2024 DURING AN INSTRUCTION FLIGHT AT 3000' MSL, THE AIRCRAFT’S ENGINE BEGAN VIBRATING VIOLENTLY AND EXPERIENCED A LOSS OF OIL PRESSURE. THE FLIGHT INSTRUCTOR DECIDED TO LAND THE AIRCRAFT IMMEDIATELY AND DETERMINED THEY COULD NOT MAKE THE NEAREST AIRFIELD (KSVH) LOCATED APPROXIMATELY 5 MILES SOUTH OF THEIR POSITION. A NEARBY FIELD WAS SELECTED AND THE ENGINE WAS SHUT OFF ONCE THE AIRCRAFT WAS WITHIN LANDING DISTANCE OF THE FIELD. THE AIRCRAFT LANDED WITHOUT INCIDENT.
UPON INSPECTION OF THE AIRCRAFT’S ENGINE, IT WAS DISCOVERED THAT ONE HALF OF ONE OF THE PROPELLER BLADES WAS MISSING FROM THE 2 BLADED MCCAULEY 1A170E/JHA7660 FIXED-PITCH PROPELLER SERIAL NUMBER APC23047. A SEARCH FOR THE MISSING PIECE WAS CONDUCTED BUT NEVER FOUND. THE REMAINING PORTION OF THE PROPELLER WAS REMOVED FROM THE AIRCRAFT. INITIAL INSPECTIONS INDICATED DAMAGE AT THE POINT OF FAILURE FROM A POSSIBLE FOREIGN OBJECT AND/OR CORROSION.
THE PROPELLER WAS SENT TO MCCAULEY PROPELLER SYSTEMS FOR FURTHER EXAMINATION. THAT EXAMINATION CONFIRMED THAT A SURFACE GOUGE NEAR THE TRAILING EDGE WAS THE INITIATION POINT OF THE FATIGUE CRACK THAT GREW UNTIL THE REMAINING MATERIAL COULD NOT HOLD, RESULTING IN AN OVERLOAD FAILURE AND DEPARTURE OF THE BLADE TIP. THE TIME SCALE BETWEEN CRACK INITIATION AND BLADE FAILURE COULD NOT BE DETERMINED.
NTSB DID NOT INVESTIGATE THIS INCIDENT DUE TO LACK OF DAMAGE TO THE AIRCRAFT, THEREFORE NO NTSB NUMBER WAS ADDED AT BLOCK 5.
REFERENCE SAS TASK T-EA68-FY24-1340
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