# SDR NX422026021800005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2026
- Submitted: February 18, 2026
- Operation: General aviation
- Filed by: [Embry-Riddle Aeronautical University Inc, repair station NX42404M](https://openairdocs.org/faa-repair-station/NX42404M/embry-riddle-aeronautical-university-inc.md) (OpenAirDocs)
- Aircraft: [N934ER](https://openairdocs.org/aircraft/N934ER), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Engine: Lyc IO360L2A
- Engine time: 2,447 hours
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankcase
- Part number: LW184025
- Part serial: L3954451E
- Condition: Gouged
- Location: Engine
- Part time: 2,447 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NX422026021800005

## Discrepancy

UPON DISASSEMBLY FOR ITS FIRST OVERHAUL, DAMAGE WAS FOUND ON THE LEFT HAND CRANCASE TO ALL 4 THRU STUD LOCATIONS. THE DAMAGE APPEARS TO BE A GOUGE WITH DISPLACED METAL JUST UNDER THE CYLINDER PAD INSIDE THE THRU STUD BORE. IN ADDITION, 1 OF THE THRU STUDS HAVE A MINOR AMOUNT OF DISPLACED STEEL UNDER THE THREADED PORTION ON THE SHOULDER OF THE THRU STUD.

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