Agusta AW139 (AB139): Other Aircraft Tools

Alignment tools – such as protractors, throwboards, and rigging fixtures – help ensure that control surfaces and components maintain their correct positional relationships. Misalignment can alter flight characteristics and reduce safety. By offering precise measurements and alignment feedback, these tools enable effective corrections. They are indispensable for maintaining consistent aircraft handling and compliance.

A rigging pin set is used during flight control and landing gear servicing to temporarily immobilize components, ensuring safe and accurate adjustments. Technicians insert these pins into control surfaces, flaps, doors, and gear linkages while rigging or adjusting tensions. This ensures neutral alignment and prevents unintended movement during setup or disassembly. Using proper rigging pins promotes both safety and precision in maintenance tasks.

Throwboards help measure the angular travel of control surfaces like ailerons and rudders during rigging. A built-in protractor scale indicates surface position relative to neutral, enabling technicians to confirm proper deflection limits. They play a critical role in verifying compliance with flight control specifications, helping avoid misrigging, which can affect handling or autopilot performance. Throwboards simplify inspection and adjustment of control geometry.

A spirit level provides a quick visual tool for confirming aircraft attitude, especially during ground leveling or weight-and-balance procedures. By placing the bubble on reference leveling lugs or door sills, technicians ensure the airframe is level before starting critical tasks. Keeping the aircraft in a level orientation ensures measurement accuracy and prevents skewed maintenance results.

Plumb bobs are used in conjunction with leveling plates and clips to verify that an aircraft is aligned along both lateral and longitudinal axes. This precise leveling is crucial during tasks such as weighing, balancing, or rigging. Technicians suspend the bob from a reference point, aligning its tip with a marked position on the floor. This method ensures accurate aircraft positioning for maintenance or flight operations.

Leveling accessories provide precise reference surfaces for plumb bobs during weight-and-balance or rigging procedures. These accessories help keep the aircraft correctly oriented, ensuring measurements aren’t skewed by attitude errors. Their use enhances the accuracy of maintenance tasks that rely on gravity-based measurements.

Rigging blocks support and align control surfaces during adjustment tasks, ensuring proper positioning relative to neutral and limiting travel. They help maintain clearance and tension while rigging surfaces such as flaps or ailerons. By using these blocks in conjunction with rigging pins and throwboards, technicians ensure accuracy and consistency in control setup.

Tools used in aircraft maintenance must meet stringent requirements outlined in regulations like 14 CFR Parts 43 and 145. Tools such as rigging pins, tensiometers, and alignment devices help ensure that maintenance procedures align with these standards. Using correct, calibrated tooling supports documentation integrity and reduces the risk of audit findings or safety incidents.

Aviation tool management, including inventory control and calibration tracking, is vital for ensuring safety, operational efficiency, and compliance. Losing or using incorrect tools can cause costly delays or even damage parts. Effective tool management and control procedures ensure tools are available, accurate, and ready when needed, reducing maintenance errors and downtime.

McNally blade clamps provide full support to rotor blades during removal, transport, or handling, minimizing the risk of bending, trailing-edge damage, or technician injury. According to product documentation, McNally blade clamps offer lightweight construction, secure mechanical locking, and the ability to manipulate blades both horizontally and vertically for safer positioning during maintenance. Their no-wearable-parts design reduces upkeep and ensures consistent performance over time. Because they reduce manpower requirements and prevent blade deformation, they offer a significant operational advantage over legacy cradle systems.

Lower liner and upper liner components help the blade clamp interface precisely with different rotor blade profiles. These liners protect the blade surface by distributing load evenly and preventing localized stress or abrasion. McNally provides interchangeable lower liners and upper liners to accommodate various blade sizes, improving tooling versatility during aviation maintenance tasks. This modular system ensures that technicians can safely adapt a single blade clamp to multiple aircraft platforms.

Seal installation tools help technicians install critical seals without distortion, contamination, or uneven seating, all of which can lead to premature failure. McNally’s seal installation tools and seal installation tool kits are designed to protect sensitive components while ensuring seals are positioned to OEM specifications. These aircraft maintenance tools reduce the risk of leaks, vibration, or system performance issues, especially in hydraulic or rotating assemblies. Their precision machining promotes repeatable results across multiple maintenance cycles.

A star plate is a precision-machined aircraft tool used to align, stabilize, or position components during aircraft maintenance procedures. McNally’s star plates are engineered to maintain consistent geometry, ensuring accurate and repeatable installations. These aviation tools are frequently used in helicopter rotor system maintenance, but can support other alignment-dependent applications. Their rugged construction allows technicians to work with confidence, reducing the likelihood of misalignment or component damage.

A McNally spindle bender kit contains specialized aviation tools designed to adjust or align spindles without damaging adjacent components. These kits help technicians maintain proper geometry and alignment during aircraft maintenance tasks that require controlled force and precision. Built with durable, high-quality materials, McNally spindle bender kits exemplify the company’s focus on reliability and consistent, field-proven functionality.

A thrust reverser lockout kit is a specialized set of tools designed to secure a thrust reverser system in its stowed position during maintenance, inspection, or component replacement. Lockout procedures prevent unintended deployment of the thrust reverser – a system that redirects engine thrust to assist with deceleration after landing - which could cause injury or damage if actuated unexpectedly during ground work. These kits help technicians comply with lockout/tagout policies and Aircraft Maintenance Manual (AMM) procedures, reducing the risk of hydraulic or electrical actuation while accessing reverser linkages or nacelle hardware. Using an approved lockout kit supports safer, more efficient thrust reverser workflows in hangar or line environments.

Thrust reverser lockout bolts are mechanical locking components that secure reverser mechanisms in a fixed position during maintenance. When installed, these bolts prevent the reverser translating sleeve or blocker door assemblies from cycling, ensuring the system remains in the stowed (non-deployed) position. This mechanical restriction is critical for protecting technicians working on nearby hydraulic, pneumatic, or structural components of the engine nacelle and for supporting compliance with established maintenance safety protocols. Because thrust reverser deployment can be controlled by hydraulic or electrical systems, using lockout bolts as part of a comprehensive lockout procedure helps reduce the risk of accidental actuation.

Thrust reverser lockout spherical seats provide a stable, repeatable interface point within a lockout assembly, helping ensure that the lockout hardware seats properly and align correctly during installation. The spherical design accommodates slight angular misalignment between components, which can occur as technicians install the tools on complex nacelle or actuator geometries. This stability improves the safety and reliability of the lockout configuration, reducing the chance of tool slippage or improper seating that could compromise the lockout condition. By supporting consistent tool engagement, spherical seats help ensure safer maintenance practices for thrust reverser systems on compatible aircraft.