101-380039-1 - Textron Aviation OEM Instrument Air Filter

101-380039-1 – Textron Aviation OEM Instrument Air Filter

Available now on the Airparts.aero Marketplace.

Overview

The Textron Aviation 101-380039-1 is a genuine OEM central instrument air filter, a flight-critical component designed to protect the high-precision gyroscopic instruments in Beechcraft King Air and 1900 series aircraft. This filter is the primary line of defense for the pneumatic system that drives the attitude indicator and directional gyro. It is engineered to capture microscopic contaminants, primarily the carbon dust generated by the system's vacuum pump, before they can enter and damage the delicate, high-RPM bearings and rotor assemblies of the gyro instruments.

Key Features

• High-Efficiency Micronic Media: Utilizes a high-density, pleated paper filter element designed to trap microscopic particles. This is essential for removing the highly abrasive carbon dust shed from the dry air pump's vanes, which is the leading cause of premature gyro failure.
• Optimal Airflow & Low Pressure Drop: The filter is engineered to provide maximum filtration efficiency while maintaining a minimal pressure drop, ensuring the gyroscopic instruments receive the consistent, clean airflow required for stable and accurate operation.
• Robust Canister Construction: The filter element is housed in a durable canister designed to withstand the pressure and vacuum cycles of the pneumatic system without collapsing or leaking.
• Scheduled Replacement Item: A critical preventative maintenance component with a mandatory replacement schedule (typically every 500 hours or annually). Adherence to this schedule is essential for protecting the significant investment of the aircraft's primary flight instruments.
• Genuine Textron OEM Part: As the genuine factory component, it guarantees the correct filtration micron rating, airflow characteristics, and physical dimensions required for the specific pneumatic systems in the King Air and Beechcraft 1900 platforms.

Technical Specifications

• Part Number: 101-380039-1
• Component Type: Central Instrument Air Filter (Gyro Filter)
• Filter Media: Pleated Micronic Paper Element
• Primary Function: Filters air for pressure-driven or vacuum-driven gyroscopic instruments.
• Certification: FAA Production Approval

Aircraft Compatibility

The 101-380039-1 is the specified OEM instrument air filter for the world's most popular family of turboprop aircraft.

• Primary Aircraft Models:
  • Beechcraft King Air: 90, A90, B90, C90, E90, F90 Series
  • Beechcraft King Air: 100, A100, B100 Series
  • Beechcraft Super King Air: 200, B200, 300, B300 (350) Series
  • Beechcraft 1900/1900C/1900D Airliner

Applications

The 101-380039-1 is a vital component for ensuring the reliability of primary flight instruments:

• Gyroscopic Instrument Protection: Its sole function is to purify the air that spins the gyros in the attitude indicator and directional gyro, preventing contamination and premature failure.
• Preventative Maintenance: A key part of the aircraft's scheduled maintenance program to ensure the continued airworthiness and reliability of the flight instrument systems.

Why Choose 101-380039-1?

The gyroscopic attitude and heading indicators are primary instruments required for instrument flight (IFR). Their failure in instrument meteorological conditions (IMC) can be catastrophic. The most common cause of gyro failure is contamination of the rotor bearings by microscopic carbon dust from the vacuum pump. The Textron Aviation 101-380039-1 is the certified, engineered solution designed specifically to trap these damaging particles. Using a genuine OEM filter guarantees you are providing the exact level of protection intended by the aircraft manufacturer, safeguarding your avionics and your safety.

Order Your 101-380039-1 Instrument Air Filter Now

Protect your valuable gyroscopic instruments and ensure the reliability of your flight deck. Visit Airparts.aero to order your genuine Textron Aviation 101-380039-1 instrument air filters today.

In a typical aircraft pneumatic system, a dry air pump (either pressure or vacuum) provides the airflow needed to spin the instrument gyros at very high speeds (up to 15,000 RPM or more). These pumps use carbon vanes that wear down over time, releasing a fine, abrasive carbon dust into the system plumbing. The 101-380039-1 filter is strategically placed in the system after the pump and before the instruments. Its micronic media is designed to capture these fine particles before they can be blasted into the instrument cases. Once inside an instrument, this conductive and abrasive dust quickly destroys the miniature, high-precision rotor bearings, leading to sluggishness, precession errors, and eventual seizure of the gyro. A clean, high-quality filter is the only thing protecting these vital instruments.

Note: This is a flight-critical component with a mandatory replacement interval. Installation must be performed by a certified A&P mechanic in strict accordance with the current Textron Aviation maintenance manual. The replacement date and aircraft hours should be logged in the aircraft's permanent records.