LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

No Fault Found

Sensor Verdict: The LCM system generated a 'Defect Detected' alert on the RED (Brake) circuit for trailer V564690 at site MDW2. However, confidence in this determination is rated at 35% — not because the sensor is suspected of error, but because the work order was closed as a dry run with zero diagnostic activity performed. The alert remains unvalidated; it is impossible to confirm or refute whether a genuine brake circuit defect exists based on the available evidence.

Photo Evidence: No photos were provided with this work order. The LCM troubleshooting procedure explicitly requires photos of each illuminated light, a clear image of the nosebox wiring, and a TechAssist app screenshot showing a green 'Verified' status for all five circuits. None of these deliverables were submitted. The complete absence of photographic evidence is a significant documentation gap and renders any technical assessment of the circuit condition impossible.

Vendor Compliance: The vendor (TA) did not follow the LCM troubleshooting procedure in any meaningful respect. No TechAssist (PCT) app was used, no circuit inspection was performed, no nosebox was examined, and no feedback from the required diagnostic category list was provided. The technician searched the yard, located the trailer on Dock Door DD124 rather than the expected parking slip PS729, and determined the trailer was inaccessible for service. While the dry run circumstance may be operationally understandable, the work order was closed without any attempt to reschedule or escalate for a follow-up inspection. The notation 'override for LCM pilot' at the top of the notes also raises concern, as it suggests the work order may have been administratively overridden rather than resolved through proper diagnostic channels.

Repair Summary: No repairs were made. The only line items billed were a shop supply/environmental fee ($2.36) and 0.5 hours of lot service hourly labor ($75.00), both categorized as indirect charges consistent with a dry run. No parts were replaced, no circuit was addressed, and the faulted RED (Brake) circuit remains in an uninspected state. There is no compliant or non-compliant brand determination applicable here given the absence of any repair activity.

Key Concerns: Several flags warrant attention from the fleet maintenance reviewer. First, the 'override for LCM pilot' note at the top of the technician's remarks is unexplained and potentially indicates an intentional bypass of the LCM workflow rather than a good-faith troubleshooting attempt. Second, the trailer's location discrepancy (expected at PS729, found at DD124 on a dock door) suggests a yard management or communication breakdown that prevented service — this should be addressed to prevent recurrence. Third, the RED (Brake) circuit alert remains open and unresolved; if the LCM sensor is functioning correctly, this trailer may be operating with a genuine brake light defect, which is a safety-critical concern. A follow-up work order should be dispatched immediately with confirmed trailer availability to complete a proper LCM diagnostic inspection.