LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

No Fault Found

Sensor Verdict: The LCM sensor flagged the YELLOW (Left Turn) circuit on trailer WV2500310 at site ORD5. Based on the available work order data, the sensor result is rated Inconclusive with a confidence of only 32%. The technician verbally asserted that all circuits were verified using the Phillips app and the unit is ready for service, but there is no corroborating documentation — no TechAssist screenshots, no photos of illuminated lights, and no circuit-specific diagnostic findings — to either confirm a real defect was present and corrected, or to credibly rule one out. The sensor alert cannot be validated or dismissed with the evidence provided.

Photo Evidence: No photos were attached to this work order. The LCM troubleshooting procedure explicitly requires photos of each light illuminated, a clear image of the nosebox wiring, and a TechAssist app completion screenshot showing a green 'Verified' status beside each of the 5 circuits. None of these deliverables were provided. The absence of photo documentation is a significant compliance gap and prevents any independent verification of the trailer's lighting condition at the time of inspection.

Vendor Compliance: Vendor compliance with the LCM troubleshooting procedure is poor. While the technician claims to have used the Phillips TechAssist app, no completion screenshot was included to substantiate this. The notes are brief and non-specific ('ALL SHOWS VERIFIED AND UNIT IS READY FOR SERVICE'), offering no detail about what was observed on the YELLOW Left Turn circuit specifically, no reference to any of the expected feedback categories (e.g., 'no defect found (confirmed with PCT)'), and no indication of steps taken during diagnosis. The note 'pv' at the close may reference a pre-verification step but is unexplained. The procedure was not followed in any documentable way.

Repair Summary: No lighting-related repairs were made. The line items billed include an 'AMAZON PCT SENSOR ACTIVATION' under the tire pressure monitoring/speed sensor category, standard service labor (0.1 hr at $109.90), lot service hourly labor (0.2 hr at $75.00), two 'LITE MECHANICAL' indirect charges, and a shop supply/environmental fee ($1.64). None of these line items correspond to a Left Turn lighting circuit repair or replacement. The PCT sensor activation charge is particularly anomalous — it appears related to a tire/TPMS sensor and has no clear connection to the LCM light circuit alert. The alerting YELLOW circuit was not addressed by any documented repair.

Key Concerns: Several red flags are present in this work order. First, the complete absence of photos or TechAssist screenshots makes it impossible to verify the vendor's claim of a clean inspection. Second, the line items are mismatched to the work order purpose — billing for a tire sensor activation on an LCM lighting work order raises questions about whether the correct trailer or correct scope of work was serviced. Third, the technician notes are vague and do not follow the structured feedback format required by the LCM troubleshooting procedure. Fourth, the claimed 'all verified' outcome is unsubstantiated and cannot be accepted as a confirmed 'no defect found (confirmed with PCT)' result. This work order should be flagged for vendor follow-up, requiring submission of TechAssist screenshots and light illumination photos before the LCM alert can be closed as a valid no-fault finding.