5012609 - Meggitt Brake Assembly For ATR 42 Aircraft

5012609 – Meggitt Brake Assembly For ATR 42 Aircraft

Available now on the Airparts.aero Marketplace.

Overview

The Meggitt 5012609 is a genuine OEM, flight-critical main landing gear brake assembly, engineered specifically for the ATR 42 series of regional airliners. This is not a simple caliper; it is a complete, high-performance, multi-disc steel brake system designed by Meggitt Aircraft Braking Systems, a world leader in aerospace stopping technology. The assembly is engineered to repeatedly absorb and dissipate the enormous kinetic energy of a transport-category aircraft during landing and rejected takeoff (RTO) events. Featuring a multi-piston hydraulic housing and a robust steel heat sink, the 5012609 provides the reliable, powerful, and fade-resistant braking performance required for high-cycle airline operations.

Key Features

• Multi-Disc Steel Heat Sink: The core of the brake is a "heat sink" stack consisting of multiple rotating steel discs (rotors) keyed to the wheel, and multiple stationary steel discs (stators) keyed to the torque tube. This alternating-disc design creates a massive surface area for friction, providing superior energy absorption and heat dissipation compared to single-disc systems.
• Multi-Piston Hydraulic Actuation: Features a high-strength caliper housing with multiple hydraulic pistons. When brake pressure is applied, these pistons provide a powerful and exceptionally uniform clamping force across the entire brake stack, ensuring even wear, stable deceleration, and maximum braking torque.
• High-Strength Steel Construction: The primary structural components and the rotors/stators are fabricated from specialized, high-strength steel alloys, heat-treated for extreme durability, thermal stability, and resistance to warping and cracking under the immense temperatures of a maximum-energy stop.
• Designed for High-Cycle Operations: Engineered for the demanding environment of regional airline service, providing a long service life and predictable wear characteristics, which are essential for minimizing maintenance downtime and controlling operational costs.
• Genuine OEM System: As a genuine OEM component from the ATR supply chain, it guarantees perfect fitment, certified performance, and seamless integration with the aircraft's hydraulic and anti-skid systems.

Technical Specifications

• Part Number: 5012609
• Component Type: Multi-Disc Steel Brake Assembly
• OEM Manufacturer: Meggitt Aircraft Braking Systems (Parker Meggitt)
• Actuation: Hydraulic, Multi-Piston
• Heat Sink: Multi-Disc Steel Rotors & Stators
• Primary Function: Main Landing Gear Braking
• Certification: EASA / FAA Production Approval

Aircraft Compatibility

The 5012609 is the specified OEM main brake assembly for the ATR 42 family of regional turboprop airliners. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) for final verification.

• Primary Aircraft Models:
  • ATR 42 (all series)

Applications

The 5012609 is a flight-critical assembly with several vital roles:

• Landing & Rejected Takeoff (RTO) Braking: The primary means of decelerating the aircraft on the runway. It is designed to absorb the full kinetic energy of the aircraft at its maximum takeoff weight and bring it to a safe stop.
• Ground Maneuvering: Provides the differential braking necessary for steering the aircraft during taxiing.
• Mandatory Overhaul Component: Brake assemblies are life-limited components that require periodic removal and complete overhaul, including the replacement of all seals and worn heat sink components.

Why Choose 5012609?

The braking system is one of the most critical safety systems on a transport-category aircraft. The Meggitt 5012609 is the certified OEM system, engineered and tested to meet the extreme energy absorption requirements of a rejected takeoff. Using a genuine OEM assembly guarantees that all components, from the hydraulic seals to the metallurgy of the steel discs, meet the original type certificate standards. For the safety of the aircraft, its passengers, and crew, there is no substitute for a fully traceable, certified OEM brake assembly.

Order Your Meggitt 5012609 Brake Assembly Now

Ensure the safety and performance of your aircraft's braking system with a genuine, factory-certified OEM assembly. Visit Airparts.aero to inquire about new or overhauled Meggitt 5012609 brake assemblies today.

O-Enhanced Addendum

The Meggitt 5012609 multi-disc brake operates by converting kinetic energy into thermal energy through friction. When the pilot applies the brakes, hydraulic fluid pressurizes a series of pistons in the caliper housing. These pistons push a pressure plate against the layered "stack" of stationary and rotating steel discs. As this stack is compressed, the immense friction between the rotors (spinning with the wheel) and the stators (held stationary by the torque tube) generates incredible heat, slowing the aircraft down. The energy absorption capacity of the brake is a direct function of the mass and specific heat capacity of the steel discs. This design multiplies the available friction surface area, allowing a relatively compact brake assembly to absorb the energy of a multi-ton aircraft landing at over 100 knots.

Note: This is a flight-critical, serialized, and life-limited aircraft assembly. Installation, servicing, and all maintenance actions must be performed by certified A&P or AME mechanics holding the appropriate ratings and in strict accordance with the current ATR maintenance manual. The hydraulic system must be properly bled and function-tested after installation.