Marsh Brothers Aviation M1000 - Bonanza MLG Door Hinge Kit
Reduce Maintenance Downtime and Costs by Eliminating the Need to Grease with the Bonanza MLG Door Hinge Kit.
An essential part of your aircraft maintenance checklist is the periodic lubrication of hard-to-access door hinge bushings. Proper lubrication is challenging because access is difficult. If these bushings are not lubricated regularly, corrosion will result, which could damage the aircraft structure. Marsh Brothers’ AeroTough® grease-free, nonmetallic bushings eliminate any chance of corrosion and reduce wear rates compared to traditional metal bushings. AeroTough® GF is self-lubricating, so these bushings will never require lubrication.
Key Benefits
- Self-lubricating – Never worry about lubricating difficult-to-access areas again!
- Reduces maintenance downtime
- Minimizes maintenance costs
- Easy to install
| General Information | |
|---|---|
| Part # | M1000 |
| Manufacturer | Marsh Brothers Aviation |
| Shipping Information | |
|---|---|
| Product Weight | 0.5 lbs. |
| Product Dimensions | 7 x 5 x 3 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Hawker Beechcraft | 56TC - Turbo Baron , 58 - Baron , 95-55 - Baron , 95-A55 - Baron , 95-B55 - Baron , 95-B55A - Baron , 95-C55 - Baron , 95-C55A - Baron , A56TC - Turbo Baron , Beech Baron , C55 - Baron , D55 - Baron , D55A - Baron , E55 - Baron , E55A - Baron |
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QUESTIONS & ANSWERS
No. One kit includes all the components needed for both the left and right main landing gear doors of the aircraft.
Accessing the main landing gear doors can be difficult. The M1002 installation kit is not essential, but it is highly recommended, as it makes installing the main landing gear hinge kits much easier.
The installation kit includes:
- 0.251" reamer – for resizing the inside diameter of the bushings in case they are tight
- Press-out and press-in jack – used to push out the OEM bushings and press in the new polymer housings
- Push pin – serves as an adapter for the screw jack
- "Stick-it" – for holding washers in place during installation
- Temporary distance piece – to keep the housing flanges from bending
The door hinge bushings in this kit are designed to fit in exactly the same space as the OEM parts. The key difference is that these bushings are made of self-lubricating polymer instead of steel. If the OEM steel components corrode and seize, the result is costly repairs to the wing's supporting structure.
The kit addresses common issues with traditional metal bushings, which can corrode and seize due to difficult access and infrequent lubrication. This leads to misaligned gear doors, damaged hinge brackets, or even cracked doors. The Marsh Brothers solution replaces metal bushings with AeroTough® GF polymer bushings, eliminating the root cause of these problems.
AeroTough® GF is a proprietary, aerospace-grade polymer developed by Marsh Brothers. It is self-lubricating, corrosion-resistant, and designed to run dry, eliminating the need for routine greasing and reducing wear in hard-to-access locations.
Metal bushings require periodic lubrication to prevent corrosion, but because the MLG hinge brackets are hard to reach, lubrication is often neglected. Over time, this can result in the bushing seizing within the sleeve, damaging the surrounding structure and creating an expensive repair situation.
By replacing lubrication-dependent bushings with self-lubricating AeroTough® GF, the kit prevents the common failure modes associated with neglect. Installing it before problems occur protects the gear doors, improves reliability, and reduces future maintenance costs.
The kit includes AeroTough® GF bushings, stainless steel sleeves, AN bolts, washers, and lock nuts – everything required to replace the bushings on two main gear doors. It’s a complete hardware package designed for long-term performance and reliability.
Yes, the Bonanza kit is FAA-approved (STC #SA03343NY) and Transport Canada-approved (STC #SA13-39). These approvals make it eligible for installation on U.S. and Canadian registered Beech Bonanza aircraft, as well as in countries that recognize these certifications.
Installation involves removing the gear doors, pressing out the steel bushings, and pressing in the new polymer components. It’s a straightforward process with the right tools, and all necessary hardware is included to complete the job.
No, lubrication is not required thanks to the built-in lubricant properties of AeroTough® GF. However, if someone inadvertently applies grease or oil, it won’t cause any harm – the material is fully compatible.
If corrosion or wear has distorted the hinge bores, reaming may be necessary to achieve the correct internal diameter. This ensures the new bushings fit properly and operate smoothly without binding.
Yes, the Marsh Brothers components are designed to fit in the same footprint as the original hardware. Where the OEM parts used flanged sleeves, the kit includes thin washers to achieve the same spacing and function.
The kit reduces the risk of hinge bracket damage by eliminating corrosion between the bushing and sleeve. This helps maintain the integrity of the gear door system and avoids extensive structural repairs caused by seized components.
Once a metal bushing seizes or starts rotating in the housing, the damage is done. Extensive de-riveting and bracket replacement may be required. Installing this kit proactively avoids such costly scenarios and improves aircraft safety.
Yes! By eliminating the need for repeated inspections and lubrication, the AeroTough® GF bushings cut down on maintenance hours, reduce service intervals, and keep your aircraft available for longer periods between shop visits.
Unlike OEM steel bushings, Marsh Brothers’ kits use advanced polymer technology that won’t corrode or seize. The result is longer service life, lower maintenance requirements, and improved overall reliability – all without changing the OEM fit or function.
