: Use of specialized tools like the BFG Capacitance Test Box for in-house testing. 4. Safety & Handling
| Step | Action | |------|--------| | 1 | Find the and full model on the device label. | | 2 | Search manufacturer website and forums for 855B . | | 3 | If no manual, search for a datasheet or generic SMPS repair guide. | | 4 | For repair: inspect, replace common failure parts (caps, fuses, transistors). | | 5 | Contact support with photos and parent equipment info. |
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
: Use of specialized tools like the BFG Capacitance Test Box for in-house testing. 4. Safety & Handling
| Step | Action | |------|--------| | 1 | Find the and full model on the device label. | | 2 | Search manufacturer website and forums for 855B . | | 3 | If no manual, search for a datasheet or generic SMPS repair guide. | | 4 | For repair: inspect, replace common failure parts (caps, fuses, transistors). | | 5 | Contact support with photos and parent equipment info. | ps-855b maintenance manual
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 : Use of specialized tools like the BFG
