Controlled procedures for runway edge, centreline, threshold, threshold wing-bar, runway-end and touchdown-zone lighting — fixture installation, height and optical alignment, secondary connection, fixture and lamp/LED module replacement, prism and lens cleaning, and mechanical, electrical, optical and operational verification of runway light fixtures. Applicable SOP range: SOP-165 to SOP-184.
Golden Rule — A runway light is not considered satisfactory simply because it illuminates. Correct location, elevation, alignment, optical performance, color, intensity, electrical connection, mechanical security and operational reliability must all be verified against the approved aerodrome lighting requirements.
To ensure runway edge lights are installed at the approved locations, elevations and orientations and provide the required visual guidance.
Verify:
The fixture shall be:
Important — Do not visually align a fixture solely by eye when the project requires a defined aiming/reference method.
To ensure runway edge lights are correctly aligned with the approved runway lighting geometry.
To verify that elevated runway edge lights are installed at the approved height and do not create unacceptable operational hazards.
Check for:
Critical Requirement — The fixture shall not create an unacceptable pavement obstruction or operational hazard.
To ensure inset runway centreline lights are installed according to the approved runway centreline lighting system.
To ensure centreline fixtures are aligned with the approved runway centreline and optical requirements.
To ensure runway threshold lights are installed in the correct pattern, position, color and orientation.
To establish a controlled method for installation of threshold wing-bar lighting where provided by the approved runway lighting system.
To ensure runway end lights are installed according to the approved runway-end lighting configuration.
To ensure touchdown-zone lights are installed at the correct locations, spacing and orientation.
Verify:
Important — TDZ alignment shall be assessed using the approved fixture-specific aiming/reference procedure rather than relying solely on visual judgment.
To ensure TDZ lights are correctly aligned with the approved optical and runway geometry requirements.
To safely replace defective runway lighting fixtures.
To maintain optical performance by removing contamination from runway light fixtures.
Inspect for:
To maintain the optical performance of runway light prisms.
There is:
Critical Rule — Never install a lamp with an incorrect rating or optical specification.
To establish a controlled method for replacing lamps in applicable conventional runway light fixtures.
Important — Do not mix incompatible LED modules, drivers or optical assemblies.
To ensure defective LED modules are replaced correctly without compromising optical or environmental performance.
To identify optical defects that may reduce runway lighting performance.
To verify the electrical condition of runway light fixtures and connections.
To ensure fixtures and mounting arrangements remain mechanically sound.
Critical Rule — Never use a generic torque value for a runway fixture when the manufacturer specifies a different value.
To verify that applicable fixture mounting hardware is tightened to the manufacturer's/project-specified torque.
To verify correct operation of runway lighting after installation, maintenance or replacement.
Verify:
Check For
The master installation workflow, quality hold points, common failure modes, the master inspection checklist and the golden rule that governs all 20 Division 08 procedures.
For runway edge, centreline, threshold, wing-bar, runway-end and touchdown-zone fixtures:
"A runway light is not considered satisfactory simply because it illuminates. Correct location, elevation, alignment, optical performance, color, intensity, electrical connection, mechanical security and operational reliability must all be verified against the approved aerodrome lighting requirements."
Technical references behind the procedures in this division:
References are given at document or chapter level for technical orientation. Confirm the current edition, amendments and national adoption (for example DGCA CAR Section 4, FAA Advisory Circulars or EASA material) for each project. Approved project specifications, manufacturer instructions and the airport's own procedures take precedence, as stated in the precedence note above.
A short answer on installation depth, taken from the Division 08 procedures. Confirm all values against the approved drawing and the manufacturer's instructions.
Runway light installation depth is the depth at which the base can and fixture mounting sit below the finished surface, so that the fixture ends up at the approved elevation. The depth is set by the approved design and the fixture manufacturer, not by a generic figure, and this division gives no universal value. In practice it is controlled through the checks in SOP-165 and SOP-167: verify the base can and foundation condition before fitting, install the frangible coupling and fixture, maintain the specified mounting height, and then measure the finished height against the project tolerance (HP-02 Base/Can and HP-04 Height). A fixture installed too deep or too shallow shows up as an uneven height against its neighbours and is corrected before final release.
Quick answers about Runway Lighting SOPs in the AGL SOP Library.
Division 08 is a set of 20 procedures (SOP-165 to SOP-184, Rev 0) for runway edge, centreline, threshold, threshold wing-bar, runway-end and touchdown-zone lighting. It covers fixture installation, height and optical alignment, secondary connection, fixture and lamp or LED module replacement, prism and lens cleaning, and mechanical, electrical, optical and operational verification.
No. The Golden Rule says correct location, elevation, alignment, optical performance, color, intensity, electrical connection, mechanical security and operational reliability must all be verified against the approved aerodrome lighting requirements.
Approved drawing, location verification, base/can inspection, transformer and secondary cable verification, fixture inspection, mounting, then height, alignment, connector and torque verification. Then optical, mechanical and electrical inspection, FOD inspection, controlled energization, operational verification, photometric verification where required, and documentation and release.
HP-01 Location, HP-02 Base/Can, HP-03 Fixture, HP-04 Height, HP-05 Alignment, HP-06 Connection, HP-07 Torque, HP-08 Optical Condition, then FOD, Operational Test, Photometry and Final Release.
SOP-167 requires verifying the approved height, using calibrated measuring equipment and a reference surface, measuring the fixture, comparing with project tolerance, checking neighboring fixtures, correcting deviations and recording measurements. Inspection looks for uneven elevations, settlement, foundation movement, incorrect hardware and damaged couplings.
Never install a lamp with an incorrect rating or optical specification (SOP-178). Confirm the lamp type, isolate the circuit, verify a safe condition, allow the lamp and fixture to cool, replace per manufacturer instructions, check the optical assembly and sealing and perform an operational test.
No. Never use a generic torque value when the manufacturer specifies a different one (SOP-183). Use a calibrated torque wrench, do not exceed the specified torque and record verification where required.
After confirming the work area, personnel and tools are clear, FOD inspection is done and permission to energize is obtained, the circuit is energized through the approved control system at the required intensity step. The team checks ON/OFF condition, color, intensity behavior, flickering, intermittent operation, abnormal brightness and optical direction (SOP-184).
Runway light installation depth is how deep the base can and fixture mounting sit so that the fixture reaches the approved elevation. It comes from the approved design and the manufacturer, not a generic figure. It is checked through base/can verification and then finished-height measurement against project tolerance (SOP-165, SOP-167).
Knowing the maintenance procedure is essential. Understanding how runway lighting fixtures, circuits and photometric performance work together takes deeper technical knowledge.
Learn through structured training covering:
Develop the technical foundation to work with AGL systems systematically, safely and confidently.
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