LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Lighting - Failed Light

Sensor Verdict: The LCM sensor alert on the GREEN (Right Turn) circuit is validated as a true positive with high confidence (88%). The technician's own diagnosis confirmed a mid right turn signal that was only partially illuminated — a classic partial LED array failure that modern LCM sensors are well-suited to detect. The partial nature of the failure (rather than a full outage) slightly tempers confidence, as partial failures can sometimes produce borderline sensor readings, but in this case the technician's notes align cleanly with the alert. There is no indication of a wiring anomaly, nosebox bypass, or Smart7 issue that might have caused a false trigger.

Photo Evidence: No photos were provided with this work order. The LCM troubleshooting procedure explicitly requires photos of each light illuminated, a clear picture of the nosebox wiring, and a TechAssist app completion screenshot showing a green 'Verified' status beside each of the 5 circuits. None of these documentation requirements were fulfilled. The complete absence of photographic evidence means there is no independent visual confirmation of the defect, the repair, the condition of remaining lights, or the post-repair state of the trailer's lighting system. This is a significant documentation gap that prevents full verification of repair quality.

Vendor Compliance: Vendor COX did not follow the prescribed LCM troubleshooting procedure. There is no mention of the Phillips Connect TechAssist (PCT) app being used at any point during the inspection or repair. No PCT completion screenshot was submitted, and the vendor did not confirm all 5 circuits as verified. While the technician did identify the correct defective component and used an appropriate failure description ('partially lit'), the feedback was not framed within the required category list (the correct term would be 'light partial failure (portion of LEDs failed)'). The line item entered is a placeholder ('Details to Follow'), which means parts information — including brand, part number, and quantity specifics — has not been formally documented, contributing further to compliance concerns.

Repair Summary: The repair involved the removal and replacement of the mid right turn signal lamp on the GREEN circuit, which is the correct circuit identified by the LCM alert. The cause was documented as 'worn out,' consistent with LED array degradation. The repair appears to directly address the alerting circuit. However, because no part number, manufacturer, or brand information was captured in the line items (placeholder only), it is not possible to confirm whether a compliant/approved brand was used — this has been flagged as 'NO' due to the lack of verifiable brand data. Labor was captured across two lines: one for diagnosis and one for the repair itself, which is appropriate.

Key Concerns: There are several notable concerns with this work order. First, the complete absence of photos and TechAssist app documentation is a serious procedural shortfall — without these, there is no way to confirm the condition of the other four circuits or validate that the repaired circuit is fully functional post-repair. Second, the placeholder line item must be resolved with actual part details before the work order can be considered fully closed. Third, while the repair appears logically sound, the lack of PCT verification means there is residual risk that additional lighting defects on this trailer were missed. Fleet reviewers should flag this vendor for a documentation compliance reminder and consider requiring photo resubmission or a follow-up PCT verification scan before releasing this trailer to active service.