Cylinder and Regulator Records That Do Not Match
You are inspecting a commercial dive locker supporting bridge inspection work. The equipment log lists 12 cylinders, but 14 are on the rack. Two aluminum 80s have hydrostatic test dates 6 years old; one shows a '+' stamp and a fill pressure of 3,300 psi, but the log has no evidence of the required requalification. A regulator set used that morning has no service record since purchase 4 years ago; the manufacturer recommends annual service. The second-stage mouthpiece is torn, and the first-stage DIN O-ring is flattened. The dive supervisor says the torn mouthpiece was 'noted but not failing' and that the extra cylinders belong to a subcontractor. The subcontractor's cylinders have no visual inspection stickers. You must decide what to remove from service, what to document, and how to handle the subcontractor equipment.
1. Identify each equipment nonconformity and state whether it is an immediate removal from service.
Read the worked answer
Remove the two aluminum 80s from service immediately: their hydrostatic tests are 6 years old, and the '+' stamp at 3,300 psi requires evidence of plus-rated requalification that the log does not show. Do not fill or use them until requalified by an authorized facility. Remove the regulator set from service immediately: no annual service in 4 years, a torn mouthpiece, and a flattened DIN O-ring are all fitness-for-service defects, and the mouthpiece is a contamination/airway risk. Quarantine the two unlogged cylinders and the subcontractor cylinders pending identity and record verification; missing visual inspection stickers means they cannot be treated as compliant. The inventory mismatch is also a finding because the log cannot demonstrate control of equipment. The supervisor's 'noted but not failing' comment does not override the defect-equipment with a known deficiency that affects safety is out of service until repaired.
2. Describe the tagging, documentation, and release-to-service process you would require.
Read the worked answer
Apply a red 'out of service-do not use' tag to each affected item, recording the reason, date, inspector, and required action. Segregate tagged equipment from ready-use racks. Open a repair or requalification order for each cylinder and regulator; for cylinders, require hydrostatic requalification and visual inspection by an authorized facility, and verify the allowable fill pressure before returning the '+' cylinder to 3,300 psi service. For regulators, require service by a qualified technician, replacement of the mouthpiece and O-ring, and a functional check. Update the equipment log with the tag number, repair order, completion date, and return-to-service authorization. For subcontractor cylinders, obtain the owner's inspection and test records, verify visual inspection status, and enter them into the site inventory before use. Release only on documented evidence; a verbal assurance is not closure.
3. How would you handle the supervisor's statement that the mouthpiece was 'noted but not failing'?
Read the worked answer
Treat the statement as evidence of a weak equipment-control culture, not as an acceptable risk decision. A torn mouthpiece can leak, be swallowed, or compromise breathing and rescue, so the supervisor's personal threshold is below the program requirement. Document the statement in the inspection report, classify the finding as a significant nonconformity, and require retraining on defect recognition and stop-use authority. Check whether other equipment was informally 'noted' and returned to service; sample the last month's equipment records and interview divers. If the pattern is repeated, escalate to management because it suggests normalization of deviance. The corrective action should include a clear rule that any known defect affecting safety removes the item from service, plus a verification audit after 30 days.