L-880 / L-881 LED PAPI System

The L-880 and L-881 are Precision Approach Path Indicator (PAPI) systems that give landing pilots a calibrated visual glideslope reference — the standard red-over-white colour transition that indicates above, on, or below the defined approach angle. The L-880 is a four-unit system for full PAPI installations on CAT I and non-precision runways; the L-881 is a two-unit reduced-aperture variant suitable for shorter runways or Abbreviated PAPI (APAPI) applications.

Each lamp housing assembly draws a nominal 300 W, positioning the L-880 at around 1,200 W total for a four-box installation — a significant reduction against older halogen PAPI systems. Hughey & Phillips cite up to 30% reduction in size and weight versus competing LED PAPI units of equivalent photometric output, which matters in retrofit scenarios where the existing PAPI foundation and cabling infrastructure is being reused without upgrade. Four additional mounting configurations beyond the standard 22-inch-front × 16-inch-deep footprint provide compatibility with the range of three-leg PAPI bases already in the ground across legacy airfield installations globally.

The system is positioned approximately 300 metres beyond the landing threshold on the runway's left side. Tool-less access to routine maintenance components (lens assemblies, internal modules) reduces the skill level and downtime associated with glidepath verification and lamp replacement visits. Approved to FAA AC 150/5345-28 and Engineering Brief 67D, with Buy American compliance, the L-880/881 is directly procurable under standard FAA AIP grant programmes.

For GCC and ICAO-regulated aerodromes outside US jurisdiction, the photometric and angular calibration criteria are consistent with ICAO Annex 14 PAPI specifications, and the physical interface to standard three-leg mounting hardware means the unit integrates into existing airfield infrastructure without civil works.