Overhead Crane Inspection Records Audit
A fabrication shop operates a 10-ton electric overhead traveling bridge crane on a 60-ft runway. The inspector reviews the crane file before the annual outage. The file contains monthly frequent-inspection sheets for the last 12 months, but every entry is initialed by the same operator, has no date, and says only 'OK.' The last annual periodic inspection was 18 months ago. The load-test certificate is dated 2014. The wire rope was replaced two years ago, but there is no rope certificate or replacement record. The hook inspection sheet says 'hook good' but has no throat-opening measurement. Six months ago the crane derailed and the runway rail was realigned and shimmed; there is no post-repair inspection or runway survey. The crane has been in daily use. You are auditing the inspection program.
1. Which records fail to demonstrate compliance, and what risk does each gap represent?
Read the worked answer
The monthly sheets are not verifiable: no dates and only 'OK' do not show what was checked or what measurements were taken. The same operator is not automatically a violation, but the entries do not demonstrate a competent inspection. The annual periodic inspection is 18 months old, so the required periodic inspection is overdue. The 2014 load-test certificate may be a baseline record, but it does not replace periodic inspections; it also does not document the 2-year-old rope replacement. The rope record lacks a certificate or installation entry, so the rope's grade, construction, and date in service are unknown. The hook sheet lacks throat-opening and twist measurements. The runway realignment after derailment has no post-repair inspection or alignment survey. These gaps can hide rope degradation, hook deformation, and runway misalignment that could cause another derailment.
2. The plant manager argues that daily use without failure proves the crane is safe. How do you respond, and what immediate inspection steps do you require?
Read the worked answer
Daily operation without a failure is not proof of safety; it only means a failure has not yet occurred. Inspections are intended to find deterioration before it becomes a load drop or derailment. Immediately restrict use until the overdue periodic inspection is performed by a qualified inspector. That inspection should cover the bridge, trolley, hoist, wire rope, hook with throat and twist measurements, brakes, limit switches, controls, runway rails, and alignment. If the derailment damaged the bridge or end trucks, require NDT or engineering review. Correct all deficiencies and document them before returning the crane to normal service.
3. Draft the documentation package and sequence needed to close the identified gaps.
Read the worked answer
Create a dated inspection file with specific checklists and measurements, not 'OK' entries. Include the inspector's name and qualification, the annual/periodic report, hook throat and twist readings, wire-rope certificate and installation date, runway alignment survey, and post-repair inspection after the rail work. Add a corrective-action log showing each deficiency, the repair, and the sign-off. If the runway repair or any structural repair is a modification, obtain the manufacturer's or engineer's acceptance and perform any required load test. Retain the old load-test certificate as history, but do not present it as the current periodic inspection.