# SDR 2026FA0000749

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 2026
- Submitted: September 22, 2026
- Operation: General aviation
- Aircraft: [N848FG](https://openairdocs.org/aircraft/N848FG), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S13459
- Aircraft time: 498 hours
- Engine: Lyc IO360L2A
- Engine time: 498 hours
- Propeller: Mcauly 1A170E
- System (JASC): [6110 · Propeller Assembly](https://openairdocs.org/jasc/6110)
- Part: Propeller
- Condition: Misinstalled
- Stage of operation: IN
- How discovered: V
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000749

## Discrepancy

PROPELLER INSTALLED INCORRECTLY AT THE FACTORY, INCORRECT CLOCKING CAUSING PROPELLER BUSHINGS TO BACK OUT: THE PROPELLER CLOCKED INCORRECTLY WITH #1 CYLINDER AT TOP DEAD CENTER.  THE FACTORY SAFETY CABLES SHOWING THIS PROP HASN'T BEEN REMOVED SINCE TAKING DELIVERY OF THE AIRCRAFT.  TWO BUSHINGS BACKING OUT OF THE CRANK SHAFT. THEY ARE BOLTS 6 AND 3, WHICH ARE LINED UP WITH THE PROP BLADES DUE TO INCORRECT CLOCKING FROM FACTORY.

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