LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Lighting - Failed Light

Sensor Verdict: The LCM alert on the YELLOW (Left Turn) circuit is assessed as 'Defect Detected' with 92% confidence. The technician's findings directly corroborate the alert — a failed left midship turn/marker lamp and damaged pigtail were found on the exact circuit flagged by the sensor. The repair of those components and subsequent verification via the Phillips Connect PCT app strongly supports that the LCM correctly identified a real lighting defect. Confidence is held just below 100% only because no photographic documentation was provided to independently confirm the pre-repair defect state.

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 five circuits. None of these were provided. While the technician verbally states they used the Phillips app to verify all light circuits, the absence of any supporting imagery means the documented repair outcome cannot be independently validated by a fleet maintenance reviewer. This is a significant documentation gap.

Vendor Compliance: Vendor compliance with the prescribed LCM troubleshooting procedure is rated as incomplete. The technician did reference using the Phillips Connect app to verify all circuits post-repair, which is a positive indicator and aligns with the PCT confirmation requirement. However, the procedure also mandates photographic documentation of each illuminated light circuit, a nosebox wiring photo, and a TechAssist app screenshot showing the 'Verified' green status for all five circuits — none of which were submitted. The technician's notes are descriptive and identify the root cause clearly, but the lack of visual evidence constitutes a meaningful deviation from the required protocol.

Repair Summary: The technician replaced the left midship combination turn/marker lamp (AUX TURN SIG/MARK LED P3, an LED unit at $113.99) and the associated pigtail (R/R LIGHT PIGTAIL), using butt connectors (SEAL-A-CRIMP BUTT 16-14 x3) and a 3-pin right-angle plug for the wiring connection. These repairs directly address the faulted YELLOW (Left Turn) circuit. The Phillips brand lamp used appears to be compliant with the Smart 7 / LCM ecosystem. An unrelated TPMS sensor activation line item is also present on the work order, which may indicate bundled or opportunistic work performed during the same visit. Post-repair PCT app verification was verbally confirmed as passing all circuits.

Key Concerns: The most notable concern is the complete absence of photographic documentation, which is a hard requirement of the LCM troubleshooting SOP. Without TechAssist screenshots or illuminated lamp photos, there is no verifiable audit trail confirming the pre-repair defect or the post-repair verified state. Additionally, the inclusion of a TPMS sensor activation line item (AMAZON PCT SENSOR ACTIVATION) on a lighting work order is unusual and warrants review to confirm it was a legitimate associated service and not an unrelated charge. The trailer was also relocated between two parking slips (PS402 → PS662) before repair, which is routine but worth noting for asset tracking. Overall, the core lighting repair appears sound and correctly targeted, but documentation deficiencies should be addressed with the vendor.