COLLINS 121A-2 Auto Emergency Disconnect A/p

( Brand: Collins ), ( Manufacturer Part Number: 121A-2 ), ( Part Type: Emergency )

Review COLLINS Auto Emergency Disconnect A/p fits PILOT

The Collins Aviation 121A-2 Auto Pilot Emergency Disconnect System (APEDS) is a crucial safety device designed for certified transport category aircraft. This system ensures that the pilot maintains full control of the aircraft during an unexpected autopilot disengagement, providing enhanced situational awareness and reducing the workload during critical phases of flight.

The 121A-2 APEDS is a standalone, battery-powered unit, which can be easily installed in the cockpit. It is designed to automatically disconnect the autopilot and autothrust systems in response to specific aircraft conditions, such as a loss of airspeed or a drastic change in pitch attitude. The system is also manually operable, allowing the pilot to initiate a disconnect at any time.

The APEDS is equipped with a bright, red emergency disconnect handle, which is easily accessible to the pilot. Once the handle is pulled, the autopilot and autothrust systems are disconnected, and the aircraft returns to manual flight control. The system also includes a warning horn and a master caution annunciator light to alert the pilot of an emergency disconnect.

The 121A-2 APEDS is designed to operate independently of the aircraft's primary power sources, ensuring that it is always ready to respond in an emergency. The system includes a rechargeable battery, which can be charged using the aircraft's electrical power or an external power source. The battery has a minimum operational life of 2 hours, providing ample time for the pilot to safely land the aircraft in the event of an autopilot failure.

The 121A-2 APEDS is designed and manufactured to meet the rigorous requirements of FAR 25.1309 and EASA CS-25. It is approved for use on a wide range of transport category aircraft, and is known for its reliability and durability. The system is also easy to maintain, with minimal required inspections and maintenance tasks.

In summary, the Collins Aviation 121A-2 Auto Pilot Emergency Disconnect System is an essential safety device for transport category aircraft. It provides pilots with the confidence and control they need during unexpected autopilot disengagements, ensuring that they can safely and effectively manage the aircraft and bring it to a safe landing. With its robust design, long battery life, and easy installation and maintenance, the 121A-2 APEDS is a valuable addition to any transport category aircraft.

Pros and Cons of buying a Collins AP-121A-2 Autopilot Emergency Disconnect (A/P) Unit

The Collins AP-121A-2 Autopilot Emergency Disconnect (A/P) unit is a crucial avionic component that enables pilots to override the autopilot system in case of emergencies. In this analysis, we will discuss the advantages and disadvantages of investing in this device.

1. Enhanced Safety: The primary advantage of the Collins AP-121A-2 A/P unit is the added layer of safety it provides. In emergency situations, such as engine failure or unforeseen weather conditions, the ability to disconnect the autopilot system manually can be vital for maintaining control of the aircraft.

2. Improved Situational Awareness: With the AP-121A-2 unit, pilots gain better awareness of their aircraft's behavior and the surrounding environment. By manually controlling the aircraft, they can respond more effectively to changing conditions.

3. Compatibility with Various Autopilot Systems: The AP-121A-2 A/P unit is compatible with a wide range of autopilot systems, making it a versatile choice for various aircraft models.

4. Durable Construction: Collins products are known for their robust design and high-quality materials. The AP-121A-2 unit is no exception, ensuring long-term reliability and performance.

1. Cost: The Collins AP-121A-2 A/P unit is a premium product, and its cost may be a significant barrier for some buyers. The expense includes not only the unit but also installation and certification fees.

2. Complexity: The AP-121A-2 unit, like any advanced avionic component, requires a certain level of expertise to install, configure, and maintain. This complexity could result in additional costs for hiring trained professionals or investing in training for in-house staff.

3. Weight and Size: The AP-121A-2 unit adds weight and size to the aircraft, which may impact fuel efficiency and overall performance. However, the benefits of safety and situational awareness often outweigh this concern.

The Collins AP-121A-2 Autopilot Emergency Disconnect unit is a valuable investment for any aircraft operator who prioritizes safety and situational awareness. Although it carries a premium price tag and requires professional installation, the advantages it offers, such as improved control during emergencies and compatibility with various autopilot systems, make it a worthwhile consideration.

If you are an aircraft owner or operator who values safety and wants the ability to respond effectively to emergency situations, the Collins AP-121A-2 Autopilot Emergency Disconnect unit is an excellent choice. Despite the initial investment and complexity, the peace of mind and enhanced control it provides are invaluable.

Details:

part #: 121a2 prices

• $50.00-$100.00

specifications aviationpar:

• for models: Pilot
• brand: Collins
• mpn: 121a-2
• part type: Emergency

offer aviationpar:

• options: Ship-to-home
• sold: 0
• started: May 18, 2026
• quantity: 1
• availability: In Stock

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• # reviews: 2588
• rating: 100.0%
• city: Delray Beach, Florida

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• condition: Used
• Parts Accessories > Aviation Parts Accessories > Parts

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• carrier: USPS
• transit: 3-10 Days
• type: Fixed
• class: Standard

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