The Piper Part 587-600 suspension elastaseet is a critical component in the landing gear system of several Piper aircraft. This elastomeric bushing absorbs shock and vibration during takeoff, landing, and taxi, ensuring smooth operation and protecting the airframe from stress. Over time, this part can wear out, leading to reduced performance and potential safety issues. Understanding its function, recognizing signs of wear, and knowing how to replace it are essential for maintaining your aircraft's airworthiness.
What Is the Piper Part 587-600 Suspension Elastaseet?
The term "elastaseet" likely refers to an elastomeric seat or bushing used in the suspension system. In Piper aircraft, the landing gear suspension relies on rubber or polyurethane components that compress and rebound to absorb energy. The Part 587-600 is a specific elastomer bushing designed for the main landing gear torque link or similar linkage. It is made of durable rubber or synthetic material that resists degradation from oil, grease, and environmental exposure.
Purpose and Function
This suspension elastaseet serves several key purposes:
- Vibration Dampening: It reduces the transmission of vibrations from the wheels to the airframe, improving comfort and reducing fatigue on structural components.
- Shock Absorption: During landing, the bushing compresses to absorb the impact, then rebounds to maintain proper alignment.
- Alignment: It helps keep the landing gear components correctly positioned, ensuring consistent steering and braking behavior.
- Noise Reduction: By isolating metal-to-metal contact, the elastaseet minimizes noise during ground operations.
Compatible Aircraft Models
The Piper Part 587-600 is commonly used in the following aircraft: Piper PA-28 series (Cherokee, Archer, Warrior), PA-32 series (Saratoga, Lance), and some PA-34 Seneca models. Always consult your aircraft's parts manual or a certified mechanic to confirm compatibility, as variations exist across serial numbers and production years.
How to Identify a Worn Elastaseet
Regular inspection of the landing gear suspension components is vital. Signs that the 587-600 elastaseet may need replacement include:
- Cracking or Dry Rot: Exposure to ozone and UV light can cause the rubber to crack. Look for surface cracks or chunks missing.
- Compression Set: If the bushing appears flattened or no longer returns to its original shape, it has lost elasticity.
- Excessive Play: During a preflight or annual inspection, check for movement in the torque link or suspension linkage. Worn bushings create sloppiness.
- Steering or Handling Changes: If the aircraft pulls during taxi or the nosewheel steering feels loose, worn suspension bushings could be the culprit.
Replacement Considerations: OEM vs. Aftermarket
When replacing the Piper 587-600 suspension elastaseet, you have two main options: OEM (Original Equipment Manufacturer) from Piper or aftermarket alternatives.
- OEM Parts: Manufactured to Piper's specifications, these ensure exact fit and performance. They are typically more expensive but offer peace of mind regarding quality and certification. For certified aircraft, many owners prefer OEM to maintain compliance with type design.
- Aftermarket Parts: Some aftermarket suppliers produce elastaseets that meet or exceed the original design. They may be more affordable and sometimes offer improved materials (e.g., polyurethane for longer life). However, ensure any aftermarket part has a PMA (Parts Manufacturer Approval) or is otherwise acceptable to the FAA for your aircraft.
Tips for Choosing:
- Always check your aircraft's maintenance manual for approved parts.
- If you fly under Part 91 (private operation), you have more flexibility, but safety should never be compromised.
- Consider the operating environment: if you operate from rough airstrips or in harsh climates, a more durable material might be beneficial.
Installation and Maintenance Tips
Replacing the suspension elastaseet is a job best left to an A&P mechanic unless you have specific training. However, if you are performing owner-assisted maintenance, here are general steps and precautions:
- Safety First: Jack the aircraft per the manufacturer's instructions and secure it properly.
- Remove the Torque Link or Suspension Arm: Unbolt the linkage that houses the elastaseet. Be prepared for spring tension if applicable.
- Inspect Adjacent Parts: Check bolts, washers, and other bushings for wear. Replace any other worn components during the same service.
- Lubrication: Apply a thin film of silicone grease or a compatible lubricant to the elastaseet before installation to ease assembly and prevent premature wear. Do not use petroleum-based lubricants, which can degrade rubber.
- Torque to Spec: Use a torque wrench and set fasteners to the values in the service manual. Over-torquing can crush the bushing, while under-torquing allows movement.
Post-Installation Check: After replacing the part, perform a ground test by cycling the landing gear (if retractable) and checking for smooth operation. Also, do a test flight with careful attention to handling during taxi and landing.
Sourcing the Piper Part 587-600
To purchase the correct part, contact a reputable aircraft parts supplier. Options include:
- Piper Authorized Service Centers or dealerships
- Specialized aircraft parts distributors that stock Piper OEM parts
- Avionics or general aviation supply companies that offer PMA-approved aftermarket alternatives
When ordering, always provide your aircraft's make, model, and serial number to ensure correct fit. Be wary of used parts, as elastomers degrade over time even if not installed. New parts are recommended for this critical suspension component.
Final Recommendation
For most Piper aircraft owners, replacing the 587-600 suspension elastaseet with an OEM part is the safest route, especially if your aircraft is used for training, rental, or frequent operations. Aftermarket options can be cost-effective if they have proven reliability and appropriate certification. Regardless of choice, replace the elastaseet at the first sign of wear, and always follow the maintenance manual for installation. A well-maintained suspension system contributes to safer landings and a longer airframe life.