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25W991036-501 - Alberth Aviation GMJA Gulfstream G100/G150 Main Gear Jack Adapter

Part #: 25W991036-501
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9 Questions, 9 Answers
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Specific Part Number

The 25W991036-501 is a specific part number of the series Alberth GMJA. For more generalized information on this item series or for more options, click here.

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Alternate PN
Alternate Models
25W991036-501Alternate PN
General Information
Part #25W991036-501
ManufacturerAlberth
Shipping Information
Product Weight6 lbs.
Product Dimensions9.5 x 5 x 2 in.
Schedule B8431100090
ECCNEAR99

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AIRCRAFT COMPATIBILITY

Compatible Aircraft*
Gulfstream
G100 (Astra SPX) NOTE This jack pad is intended for use on the main landing gear of the aircraft.
,
G150 NOTE This jack pad is intended for use on the main landing gear of the aircraft.
*This list is for general reference only and may not be entirely accurate for all aircraft. Please confirm all equipment meets the requirements of your aircraft with the owners/maintenance manuals prior to purchasing or using with your aircraft.

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QUESTIONS & ANSWERS

Question:
What is the Alberth Aviation GMJA Gulfstream G100/G150 Main Jack Adapter designed to do?
Answer:

The Alberth Aviation GMJA Main Jack Adapter is engineered to provide a secure, precision contact point between an aircraft jack and the main landing gear of Gulfstream G100 and G150 aircraft. It enables safe, stable lifting during maintenance, tire changes, and landing gear servicing procedures. The adapter helps distribute the load evenly and prevents damage that can occur when jacking without the correct interface. Its use supports efficient ground support operations.

Asked February 25, 2026
Question:
Which Gulfstream aircraft models is the GMJA adapter compatible with?
Answer:

The GMJA Main Jack Adapter is specifically designed for use with the main landing gear on Gulfstream G100 (Astra SPX) and Gulfstream G150 aircraft. These business jets share main gear design points that the GMJA matches precisely. Technicians should always confirm aircraft model and part compatibility using the aircraft’s maintenance manual before beginning any jacking procedure. Using the correct model-specific adapter promotes safe, compliant maintenance operations.

Asked February 25, 2026
Question:
How does the GMJA adapter improve safety during main gear jacking?
Answer:

By providing a model-specific interface, the GMJA adapter helps ensure that the aircraft jack engages accurately with the main gear jacking point. This precise fit minimizes movement or slippage that could compromise safety during lifting. A secure jack-to-gear connection also helps maintain proper load distribution across the airframe. As a result, technicians can perform maintenance and tire servicing with reduced risk of equipment damage or injury.

Asked February 25, 2026
Question:
Can the GMJA adapter be used with different types of aircraft jacks?
Answer:

Yes, the GMJA Main Jack Adapter is designed for use with compatible hydraulic or mechanical aircraft jacks that meet Gulfstream jacking specifications. The adapter serves as a specialized contact piece between the jack saddle and the aircraft’s jacking point. However, technicians should verify that the jack’s capacity, reach, and configuration are suitable for Gulfstream G100/G150 maintenance. Confirming equipment compatibility ensures both safety and proper operation.

Asked February 25, 2026
Question:
What materials and construction features contribute to the durability of the GMJA adapter?
Answer:

The Alberth Aviation GMJA Main Gear Jack Adapter is manufactured from high-quality, tool-grade stainless steel for superior strength and long-term durability. This robust construction allows the adapter to withstand repeated jacking cycles and the high loads associated with Gulfstream G100 and G150 maintenance operations. Stainless steel also provides corrosion resistance, helping maintain structural integrity in demanding hangar environments. Its durable, professional-grade design supports safe and reliable aircraft jacking procedures.

Asked February 25, 2026
Question:
How does using the GMJA adapter support efficient maintenance workflows?
Answer:

Using the GMJA adapter helps streamline routine tasks, such as tire changes, inspections, and other main gear servicing, by providing a secure, repeatable jacking interface. Technicians spend less time adjusting or “shimming” connections, thereby speeding up turnaround times in busy hangars. The precision design reduces setup time and supports predictable procedures. Overall, it contributes to more efficient maintenance operations.

Asked February 25, 2026
Question:
Are there industry or manufacturer guidelines for using a jack adapter like the GMJA?
Answer:

Yes, technicians should always adhere to Gulfstream OEM guidance and Aircraft Maintenance Manual (AMM) procedures when jacking aircraft. Using the correct jack adapter that matches the specified jacking points – such as the GMJA for G100/G150 aircraft – is part of those procedures. These guidelines ensure lifts are conducted safely, with proper load distribution and structural protection. Compliance with OEM jacking practices also helps protect warranty coverage and aircraft integrity.

Asked February 25, 2026
Question:
What should maintenance personnel inspect before using the GMJA adapter?
Answer:

Before each use, technicians should inspect the GMJA adapter for signs of wear, corrosion, deformation, or damage that could compromise its performance. It’s important to ensure the contact surfaces are clean and free from debris that might affect stability. Regular inspection helps maintain safety and reliability in maintenance operations. Any compromised adapters should be removed from service until repaired or replaced.

Asked February 25, 2026
Question:
Is there a difference between the GMJA and the larger Gulfstream main gear adapter kits like GMGJAK?
Answer:

Yes, the GMJA is a single main jack adapter tailored specifically for Gulfstream G100 and G150 aircraft. In contrast, comprehensive kits like the GMGJAK Main Gear Jack Adapter Kit include multiple sleeves and components designed to work with a broader range of Gulfstream aircraft and main gear geometries. Such kits are often used in facilities servicing multiple models. Technicians should select the adapter or kit based on the specific aircraft being maintained.

Asked February 25, 2026