Controlled procedures for the planning interface, installation, structures, fixtures, cabling, transformers, connectors, inspection, testing and photometric verification of approach lighting systems — applicable to ALS, SALS, SSALR, MALSR, MALSF, ALSF-type systems, PALS and other approved approach lighting configurations.
Important — The exact approach lighting configuration, length, bar geometry, fixture spacing, elevations, aiming, colors, intensity, structure dimensions, frangibility, obstruction requirements and photometric criteria shall always be taken from the approved aerodrome lighting drawings, applicable ICAO/FAA/DGCA requirements, approved obstacle/approach-lighting study, manufacturer instructions and project specification.
To establish a controlled procedure for installing an approach lighting system in accordance with the approved design and aerodrome requirements.
Verify:
The system shall match the approved:
Geometry + Elevation + Alignment + Optical Configuration + Electrical Configuration + Control Configuration.
Critical Principle — Approach lighting alignment must be assessed as a complete visual guidance pattern, not merely as individual fixture alignment.
To ensure approach light fixtures are correctly aligned with the approved approach lighting geometry.
Alignment shall be established from the approved:
To verify that approach light fixtures and structures are installed at the approved elevations.
Verify:
Important — Do not assume all approach light fixtures use identical aiming requirements. Follow the fixture manufacturer's approved aiming procedure.
To ensure fixtures are oriented correctly toward the intended approach direction.
To establish a safe and controlled procedure for installing approach light poles/support structures.
Verify:
Escalation — Any suspected structural instability, significant deformation or impact damage shall be treated as a safety-critical defect and assessed before continued service.
To identify structural conditions that may affect the safety, alignment or reliability of the approach lighting system.
Check:
To ensure approach light fixtures are correctly installed on their approved structures/supports.
Critical Check — Cable installation shall not compromise fixture alignment, frangible structure, drainage, mechanical safety or electrical integrity.
To ensure approach-lighting cables are installed, protected and identified according to the approved design.
Important — Transformer rating shall be matched to the approved fixture/load and manufacturer requirements.
To establish controlled installation requirements for isolating transformers associated with approach lighting fixtures.
Critical Rule — The connector shall be protected against moisture ingress and mechanical damage in accordance with the approved installation method.
To ensure approach-lighting connectors are correctly installed, sealed and identified.
To establish a safe method for replacing defective approach lighting equipment.
To maintain optical performance through controlled cleaning of approach-lighting fixtures.
Inspect for:
To provide a systematic inspection of the complete approach lighting installation.
A. Structural
B. Mechanical
C. Optical
D. Electrical
E. Environmental
System-Level Principle — Do not accept the system solely because every fixture illuminates. Verify that the complete approach lighting pattern functions correctly.
To verify correct operation of the approach lighting system following installation, repair or maintenance.
Confirm:
Critical Rule — Photometric acceptance values must come from the applicable standard, approved project specification or equipment/system requirement. Do not insert generic acceptance limits into the SOP.
To verify the photometric performance of the approach lighting system against the applicable approved requirements.
Photometric verification may include, as applicable:
Verify:
The master workflow, quality hold points, common failure modes and inspection checklist that apply across all 15 Division 10 procedures.
The following sequence should be applied end-to-end for every approach lighting installation:
The inspection/commissioning team should confirm:
“Approach lighting is a precision visual guidance system. Successful installation is not simply the installation of poles and lights; the complete system must maintain the approved geometry, elevation, alignment, optical performance, structural integrity, electrical reliability and photometric performance from the approach end through the runway threshold.”
Each project should adapt these SOPs to its own approved aerodrome lighting drawings, applicable ICAO/FAA/DGCA requirements, approved obstacle/approach-lighting study, fixture and transformer manufacturer's instructions, and applicable photometric acceptance criteria.
Approved project drawings, the applicable regulatory requirements and manufacturer's instructions shall take precedence wherever they impose more restrictive 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 approach lighting replacement, taken from SOP-214 in Division 10. Confirm all criteria against the approved design and the current standard.
Approach lighting replacement follows SOP-214. Obtain work authorization and coordinate with Airport Operations/ATC as required. Identify the defective fixture, isolate the circuit, apply LOTO where applicable and verify a safe electrical condition. Inspect the surrounding structure, disconnect the connector, remove the defective fixture and inspect the mounting arrangement. Install the approved replacement, connect the secondary cable, then verify orientation, height and alignment and apply the specified torque. Finish with electrical testing, functional testing, photometric verification where required and the work-clearance process.
Quick answers about Approach Lighting SOPs in the AGL SOP Library.
Division 10 is a set of 15 procedures (SOP-204 to SOP-218, Rev 0) for approach lighting systems. It covers the planning interface, installation, structures, fixtures, cabling, transformers, connectors, inspection, testing and photometric verification for ALS, SALS, SSALR, MALSR, MALSF, ALSF-type systems, PALS and other approved configurations.
From the approved aerodrome lighting drawings, applicable ICAO, FAA and DGCA requirements, the approved obstacle/approach-lighting study, manufacturer instructions and the project specification. This includes configuration, length, bar geometry, spacing, elevations, aiming, colors, intensity, structure dimensions and frangibility.
No. The system-level principle in SOP-217 says the complete approach lighting pattern must be verified as functioning correctly, including operation through the applicable intensity levels, not just individual fixtures illuminating.
No. Photometric acceptance values must come from the applicable standard, approved project specification or equipment/system requirement (SOP-218). Verification may cover intensity, distribution, uniformity, color, horizontal and vertical aiming, intensity steps, individual fixture output and the system-level pattern.
Approved design, centreline and threshold reference, structure location, foundation inspection, pole or structure installation, alignment and height check, fixture installation and alignment, cable, transformer and connector installation. Then electrical, mechanical and optical inspection, FOD/area inspection, controlled energization, functional testing, photometric verification, defect rectification, retest and final acceptance.
The approved pole location, type and height, foundation, structural details, frangibility requirement, wind and environmental design, cable route and access arrangements (SOP-208). After installation, verticality, mechanical security and the frangible arrangement where required are checked.
SOP-206 uses approved elevation data and a survey reference to measure pole, fixture and crossbar elevation and compare it with the approved design. It checks consistency between stations, ground clearance, structural settlement and the fixture-to-centreline relationship.
Approach lighting replacement (SOP-214) covers work authorization, isolation and LOTO, structure and mounting inspection, installation of the approved replacement and secondary cable connection, then orientation, height, alignment and torque checks, electrical and functional testing, photometric verification where required, and work clearance.
Knowing the maintenance procedure is essential. Understanding how approach lighting sequencing, circuits and structures 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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