9910547-1 – Textron Aviation OEM Master Brake Cylinder Assembly
Available now for sale or exchange on the Aerospace Parts Marketplace.
Overview Section
The 9910547-1 is a high-performance Master Brake Cylinder Assembly manufactured by Textron Aviation (primarily associated with the Cessna product line). This critical hydraulic component is responsible for converting mechanical force from the pilot's rudder pedals into hydraulic pressure to actuate the aircraft's braking system.
Originally designed for twin-engine Cessna aircraft, this part is often found in the Cessna 340, 414, and 421 series. It is a dual-voltage compatible airframe part that typically serves as an OEM replacement for the Cleveland 10-36 or Gerdes A-049-6 style cylinders. The assembly is built to exacting Textron standards to ensure consistent pedal feel and reliable braking authority during taxi and landing rolls.
Key Features Section
OEM Reliability: Manufactured by Textron Aviation specifically for high-performance twin Cessna airframes, ensuring perfect fit and function.
Alternative Part Compatibility: Directly replaces or is synonymous with part numbers 10-36 (Cleveland), 010-03600, and 5044000-4.
Rugged Construction: Features a corrosion-resistant aluminum body and precision-ground internal piston for long service life.
Standard Mounting: Designed for standard rudder pedal attachment points, allowing for relatively straightforward field replacement.
Sealing Integrity: Utilizes high-grade internal O-rings and seals compatible with standard MIL-PRF-5606 (red) mineral-base hydraulic fluid.
Technical Specifications Section
Part Number: 9910547-1
Component Type: Master Brake Cylinder Assembly
OEM Manufacturer: Textron Aviation (Cessna)
Alternative P/N: 10-36, A-049-6, 5044000-1, 5044000-4
Fluid Compatibility: MIL-PRF-5606 (Red Mineral Base)
Packaged Weight: Approximately 0.63 lbs
Packaged Dimensions: 6.6 x 9.25 x 2.25 inches
Application: Left-hand (LH) or Right-hand (RH) installation (Verify by aircraft tail number)
Aircraft Compatibility Section
The 9910547-1 is primarily used on Textron (Cessna) twin-piston and turboprop aircraft:
Cessna 340 / 340A: Standard master cylinder for primary braking.
Cessna 414 / 414A (Chancellor): Core component of the landing gear/braking system.
Cessna 421 / 421C (Golden Eagle): High-utilization part for heavy-twin braking requirements.
Cessna 335: Compatible with the 335 series braking architecture.
Note: Installation must be performed in accordance with the aircraft's Illustrated Parts Catalog (IPC) and Maintenance Manual (AMM). Always verify the current modification status of your landing gear assembly before ordering.
Why Choose the 9910547-1?
The 9910547-1 is a safety-critical hydraulic component. Brake failure on a twin-engine aircraft can lead to loss of directional control during high-speed taxi or a runway excursion upon landing. Choosing the OEM Textron assembly over generic alternatives ensures that the internal bore diameter and displacement are perfectly tuned to the aircraft's brake calipers. This prevents "spongy" pedals and ensures that the pilot has maximum braking authority when it is needed most.
The 9910547-1 operates on a compensating port design. When the brake pedals are at rest, an internal port opens to allow hydraulic fluid to flow between the brake lines and the reservoir. This is essential for accounting for fluid expansion due to heat (brake drag) and ensuring the system is always self-leveled. The high manufacturing tolerances maintained by Textron for the 9910547-1 ensure that this port remains clear and functional, preventing "brake lock" scenarios that can occur with poorly manufactured aftermarket cylinders.
Note: After installation, the hydraulic system must be bled to remove all air. Failure to properly bleed the 9910547-1 will result in insufficient braking pressure. Use only red MIL-PRF-5606 fluid; mixing fluid types will cause total seal failure.
Documentation
Textron Aviation Service Information: Refer to Cessna model-specific maintenance manuals for removal and installation (R&I) procedures.
FAA Form 8130-3: Typically required for installation on certified aircraft; ensure your unit comes with a valid airworthiness tag.