Ps-855b Maintenance Manual · Extended

The PS-855B Maintenance Manual (formally identified as Component Maintenance Manual TP-483) is the primary technical document used for the installation, operation, and servicing of the L3Harris (formerly JET or B.F. Goodrich) PS-855B Emergency Power Supply. This self-contained unit is critical for aviation safety, providing backup power to essential flight instruments like attitude gyros and standby indicators during a total aircraft electrical failure. Core Technical Specifications

If You're Looking for the Manual:

  1. D. Contact the Manufacturer or Distributor

    If the brand is known, email their technical support. Provide: ps-855b maintenance manual

    Understand the Structure: Typically, a maintenance manual is structured to include safety precautions, technical specifications, maintenance schedules, troubleshooting guides, and detailed instructions for repair or replacement of parts. A concise summary of typical maintenance procedures and

    The PS-855B is an Emergency Power Supply (EPS) manufactured by L3Harris (formerly JET/L-3 Communications) that provides backup power to attitude gyros and other critical avionics during a total aircraft power failure. Maintenance for this unit is primarily governed by the Component Maintenance Manual (CMM) TP-483, which includes an Illustrated Parts List (IPL). Primary Maintenance Manual: TP-483 where to look).

    • A concise summary of typical maintenance procedures and safety precautions.
    • Step‑by‑step troubleshooting for specific subsystems (power, cooling, controls).
    • A checklist of routine inspections and parts to replace with suggested intervals.
    • Diagrams explained (if you upload an image or excerpt).
    • Guidance on finding an official manual (what keywords to search, where to look).
    1. Read and understand the manual: Familiarize yourself with the manual's contents, organization, and procedures.
    2. Follow procedures: Adhere to the procedures and guidelines outlined in the manual.
    3. Keep the manual up-to-date: Ensure the manual is current and reflects any updates or changes to the system.
    4. Train personnel: Ensure that personnel responsible for maintaining, operating, or repairing the PS-855B system are properly trained and familiar with the manual.

    Emergency Power Supply (EPS) unit manufactured by (formerly J.E.T. / BFGoodrich) and now supported by Extant Aerospace

    • Always disconnect power to the equipment before starting work.
    • Wear protective gear, including gloves and safety glasses.
    • Ensure the work area is well-ventilated and free from flammable materials.