LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

No Fault Found

Sensor Verdict: The LCM sensor flagged the GREEN (Right Turn) circuit on trailer V505503 at site DET3. The sensor result is rated as Inconclusive with 35% confidence. While the vendor reported no active faults at the time of service, the inability to locate the unit via the Phillips Connect TechAssist (PCT) app means the GREEN circuit was never electronically verified as healthy. The tightening of a loose ATIS through-tee connection could plausibly explain an intermittent fault that self-cleared, but this cannot be confirmed without PCT data.

Photo Evidence: Only one photo was provided, showing the curbside/rear-side exterior of the trailer with the Amazon branding and trailer number V505503 visible. This image serves only as an asset identification photo. No photos of illuminated lights, individual lamp circuits, nosebox wiring, or the TechAssist app completion screenshot were provided. This represents a significant documentation gap and falls well short of the required photo evidence outlined in the LCM troubleshooting procedure.

Vendor Compliance: The vendor did not follow the LCM troubleshooting procedure. The notes explicitly state the PCT app would not locate the unit, meaning the TechAssist guided workflow was not completed. No TechAssist 'Verified' screenshot was captured for any of the 5 circuits. No photos of each light illuminated were provided, and no clear nosebox wiring photo was submitted. The vendor selected their own diagnostic path (tightening an ATIS tee) without completing the required structured PCT troubleshooting. This work order does not meet the minimum compliance standard for LCM-generated work orders.

Repair Summary: The only repair action noted was tightening the LF (Left Front) ATIS through-tee connection. No parts were replaced, and no line items were submitted. This action addresses a potential loose connection at the front of the trailer but does not directly correspond to the GREEN (Right Turn) rear lamp circuit that triggered the LCM alert. It is possible a loose ATIS tee caused an intermittent signal issue upstream, but without circuit-specific verification, this link is speculative.

Key Concerns: There are several notable concerns with this work order. First, the PCT app failed to locate the unit — this is a critical failure point, as the entire LCM troubleshooting protocol depends on TechAssist connectivity. Second, the repair performed (LF ATIS tee tightening) does not align with the faulted GREEN circuit, raising questions about whether the correct defect was identified and addressed. Third, zero compliant photos were submitted — no lit lamp photos, no nosebox photo, no app screenshot. Fourth, no parts were billed, which is consistent with a connection tighten but does not inspire confidence that a root cause was found. This WO should be flagged for vendor follow-up and the trailer should be reinspected with a functioning PCT connection to verify the GREEN circuit status.