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Ps-855b Maintenance Manual [verified] -

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Ps-855b Maintenance Manual [verified] -

A significant frustration is discovering that your physical PS-855B unit is a while the available manual is for revision 1 . What then?

Performing the procedures in the manual requires specific specialized tools and materials:

PS-855B Maintenance Manual (specifically part number ) is the essential technical document for servicing the L-3 Avionics (formerly JET or B.F. Goodrich) emergency power supply. This unit is a critical safety component that provides 24 VDC and 5 VDC backup power to aircraft instruments like attitude gyros during a total electrical failure. Southeast Aerospace Inc. Key Maintenance Requirements ps-855b maintenance manual

: Use of specialized tools like the BFG Capacitance Test Box for in-house testing. 4. Safety & Handling

The PS-855B Maintenance Manual provides detailed troubleshooting guides and repair procedures for common issues and faults. The manual includes: A significant frustration is discovering that your physical

, search for the numbers printed on the circuit board inside the device (e.g., PCB-855B ).

: Instructions on how the unit automatically maintains full charge during normal flight, reaching 50% capacity within just one hour of operation. Goodrich) emergency power supply

The PS-855B (P/N 501-1712-02) lead-acid emergency power supply, manufactured by L3Harris/Avionics Systems, requires regular maintenance guided by CMM TP-483 and Service Letter SL-170, including visual checks for outgassing and annual capacity tests. Essential procedures involve a 5-second push-to-test for capacity, a 7.0-ohm load test for 48 minutes, and specific 8 to 23-hour recharging requirements to ensure continued airworthiness. For detailed procedures, refer to the L3Harris CMM TP-483 documentation at seaerospace.com Southeast Aerospace Inc. L3Harris PS-855B | SEAEROSPACE.COM