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Case Study 01

Resolving 7,000+ Plinth Fastener Non-Conformances Without Delaying Project Completion

K-Line · LACMTA Transportation Quality Management
7,000+

Fasteners inspected, documented &
repaired

8 miles

Corridor assessed under structured
procedure

Zero

Schedule impact from resolution

Two construction workers in safety vests and helmets inspecting railway tracks on an outdoor construction site.

THE CHALLENGE

Late in construction of the $2.2 billion Crenshaw/LAX Light Rail project, plinth fastener non-conformances were identified across the corridor — a condition affecting thousands of individual fasteners along eight miles of track. With the project approaching completion, an unstructured response risked exactly what the program could not afford: open-ended rework, an unmanageable documentation burden, and schedule delay on a high-visibility public program.


THE APPROACH

A1MI developed a structured assessment and resolution procedure covering the full corridor. Every affected fastener was individually inspected, documented, and dispositioned under a defined workflow — creating a complete, traceable record tying each repair to its inspection and acceptance.

Rather than treating the issue as thousands of isolated defects, A1MI managed it as a single controlled program: standardized inspection criteria, batch tracking by corridor segment, and disposition logic agreed with the owner and design-builder up front, so resolution didn't stall in case-by-case debate.


THE OUTCOME

More than 7,000 fasteners were inspected, documented, and repaired under the structured procedure, with the full eight-mile corridor assessed. The non-conformance was resolved with zero impact to the project completion schedule — and the complete documentation record supported final acceptance without reopening the issue at closeout.

An underground train tunnel with train tracks and a concrete wall on the left side, illuminated by a series of lights along the tunnel ceiling. The end of the tunnel appears bright and the rails are mounted on concrete sleepers with cables and pipes running alongside.
Related Project

Crenshaw/LAX Light Rail — K-Line

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