LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

No Fault Found

Sensor Verdict: The LCM system generated an alert on the BLACK circuit, which governs Clearance and License Plate lighting on trailer WV2501894 at site DEN4. The sensor result is classified as Inconclusive with a confidence of 35%. While the vendor claims all lights are functional, the absence of any supporting photographic or app-based verification evidence makes it impossible to confirm or deny the original sensor alert with reasonable certainty. The LCM system has a strong track record of identifying real circuit anomalies, and a lack of documentation does not equate to a confirmed no-fault condition.

Photo Evidence: Two photos were submitted, both labeled 'MUDFLAPS.jpeg.' Photo 1 shows the rear undercarriage of a trailer from a low angle, featuring dual rear tires, trailer clearance lights in the background, and mudflap hardware — but no illuminated lights and no nosebox wiring. Photo 2 is a similarly angled, very dark shot of the undercarriage and tires with no discernible lighting components visible. Neither photo shows any light illuminated, no close-up of the clearance or license plate lamps, no nosebox wiring image, and critically, no TechAssist app screenshot showing green 'Verified' status across all five circuits. The photo submission does not meet any of the required documentation standards for this LCM campaign.

Vendor Compliance: The vendor (TA) did not follow the LCM troubleshooting procedure as instructed. The procedure explicitly required: (1) photos of each light illuminated, (2) a clear picture of the nosebox wiring, and (3) a TechAssist app completion screenshot showing green 'Verified' beside each of the 5 circuits. None of these three requirements were fulfilled. The technician notes mention using the TechAssist app and checking that all nuts are tight in the Smart7, which is a positive indicator of some engagement with the procedure, but without the required screenshot, PCT app use cannot be formally confirmed. The failure category selected ('no defect found') requires PCT confirmation per the defined subcategory list, which was not provided.

Repair Summary: No repairs were made on this work order, and no parts or labor line items were submitted. This is consistent with a no-fault finding, but only if properly documented. The alerting BLACK circuit (Clearance/License Plate) was reportedly inspected but no targeted repair or part replacement was performed. Without evidence that the specific circuit was tested and cleared through the TechAssist app, it is not possible to confirm the alerting circuit was adequately addressed.

Key Concerns: There are several significant concerns with this work order. First, the submitted photos are entirely non-compliant — mudflap images have no relevance to a lighting circuit inspection and suggest the technician may not have understood the photo documentation requirements. Second, the absence of a TechAssist PCT screenshot is a critical documentation gap that undermines the no-fault claim. Third, no line items were submitted, which while acceptable for a no-fault outcome, further reduces the evidentiary record. This WO should be flagged for vendor feedback and a follow-up inspection may be warranted to confirm the BLACK circuit is genuinely functional, particularly given the original LCM alert.