# SDR 2026F00027

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2026
- Submitted: March 11, 2026
- Operation: General aviation
- Aircraft: [N631BC](https://openairdocs.org/aircraft/N631BC), registered now
- Make and model: Saab SF340A
- Registry model: [Saab SF340A](https://openairdocs.org/model/saab-scania-sf340a) (OpenAirDocs)
- Aircraft serial: 340A061
- Aircraft time: 47,237 hours, 45,367 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Swivel Fitting
- Part number: L38710SA
- Condition: Broken
- Location: Zone 700
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026F00027

## Discrepancy

HYDRAULIC CWP LIGHT ILLUMINATED AFTER TAKEOFF. HYDRAULIC QUANTITY APPEARED TO INDICATE BELOW RED LINE, AND MAIN HYDRAULIC PRESSURE APPEARED TO BE INDICATING 0. COMPLIED WITH QRH. DIVERTED BACK TO KMIA. THE SWIVEL IS LOCATED ON THE RH MLG DRAG BRACE AND PORTS HYDRAULIC FLUID TO THE DOWNLOCK ACTUATOR. THE FIXED MOUNTING PORTION OF THE SWIVEL IS MADE OF STEEL. THE INNER SWIVELING PORTION IS A SPOOL MADE ALUMINUM. THE SPOOL IS RETAINED IN THE FIXED PORTION WITH A FLANGE RETAINED BY A SAFETIED SCREW. THE SPOOL IS DRILLED TO ALLOW FLUID TO PORT FROM THE FIXED PART TO THE SWIVEL. THE SPOOL FAILED IN THE DRILLED PASSAGE ALLOWING THE SPOOL TO SEPARATE FROM THE FIXED PORTION. DRAG BRACE TOTAL CYCLES SINCE OH IS 3791 CYC.

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