4133801011

ROTATING MECHANISM TPIS
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About this product
The Rotating Mechanism TPIS Part Number 4133801011 is a precision mechanical assembly that links the hydraulic actuation system to the trunnion torque tube on an aircraft’s main landing gear. During extension and retraction, it converts linear hydraulic cylinder movement into controlled rotation of the landing gear leg, ensuring proper gear deployment, stowage, and lock engagement.
4133801011 Datasheet
UOM: EA
Stock Location: Dubai
Hazardous Item: Non-Hazardous Item
Life Limited Part: No
Lead Time: Stock
Certification: Dual Release
8130/EASA Eligible: Yes
PRODUCT DESCRIPTION

4133801011

  • Precision Machined Torque Interface: CNC-machined splines and mating surfaces ensure accurate transfer of actuator force to the gear leg, eliminating backlash and wear.

  • Integrated Position Feedback: Built-in sensors provide real-time mechanical position indication signals to the landing gear control computer for reliable extension/retraction sequencing.

  • Self-Lubricating Bearings: Composite sleeve bearings reduce the need for routine lubrication while maintaining smooth rotation under high dynamic loads.

  • Corrosion-Resistant Coatings: Protected with MIL-SPEC anodising and phosphate coatings to withstand salt spray, hydraulic fluid exposure, and extreme temperature cycles.


  • Converting hydraulic actuator motion into rotational movement for main landing gear deployment.

  • Providing mechanical stop engagement and lock indication for safe gear operations.

  • Supplying position feedback to cockpit indicators and gear control computers.

  • Serving as a direct replacement for Boeing 737 NG and similar airframe main gear assemblies.


  • What does the “OH” condition indicate?

“Overhaul” means the unit has been disassembled, inspected, refinished, reassembled, and bench-tested to meet OEM performance standards.

  • How is position feedback provided?

Internal sensors within the mechanism generate discrete electrical signals that correspond to specific gear positions.

  • What maintenance procedures apply to this component?

Periodic inspection of spline engagement, bearing wear assessments, and functional torque-load testing are performed during scheduled C-checks.


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