Precision Approach Path Indicator Lights

This article explains the fundamental operating principle, optical beam projection, glide path indication, and electronic control mechanisms of the L-880(L) and L-881(L) LED Precision Approach Path Indicator (PAPI) system.

This article lists all replacement parts, subassemblies, and spare components with descriptions and part numbers for the L-880(L) LED PAPI and L-881(L) LED APAPI to support field service and maintenance.

This article details the peak VA ratings, power consumption values, and required isolation transformer specifications for the L-880(L), L-881(L) Precision Approach Path Indicator Lights

This article details the catalog numbering system, configuration options, leg lengths, voltage types, and accessory selections for ordering the L-880(L) LED PAPI and L-881(L) LED APAPI Precision Approach Path Indicators.

This article provides the step-by-step procedures for installing the Light Head Assembly (LHA), mounting legs, and related hardware for the L-880(L) LED PAPI and L-881(L) LED APAPI systems.

This article provides the complete step-by-step procedure for safely removing and replacing the Power Conditioning Board (part number 88-00400) in the Light Head Assembly of the L-880(L) and L-881(L) LED Precision Approach Path Indicator system.

This article provides the complete step-by-step procedure for safely removing and replacing the RS485 Communications Board (part number 88-00300) in the Light Head Assembly of the L-880(L) and L-881(L) LED Precision Approach Path Indicator system.

This article provides the complete step-by-step procedure for safely removing and replacing the Control and Tilt Board (part number 88-00100) in the Light Head Assembly of the L-880(L) and L-881(L) LED Precision Approach Path Indicator system.

This article lists the recommended regular maintenance actions for the L-880(L) LED PAPI and L-881(L) LED APAPI to ensure continued trouble-free operation and reliable glide path guidance.

A step by step procedure for adjusting the baffles on an L-880(L), L-881(L) Precision Approach Path Indicator Lights (PAPI)