Hydraulic Power Unit Replacement in a 1928 Building

Replacing the power unit and controller is an alteration, not routine maintenance. The controller and power unit are major listed components whose replacement changes the elevator’s operation and safety-related circuits. Under Maryland’s adopted elevator regulations and ASME A17.1, an alteration requires a permit, inspection, and acceptance testing by the authority having jurisdiction before the elevator is placed back in service. The fact that the elevator “passed last year” is irrelevant: the permit and inspection attach to the alteration, not to the prior annual certificate. Because this is an existing installation, the mechanic must also evaluate the altered scope against the adopted existing-elevator requirements (A17.3), not only against new-construction requirements. Practically, the job cannot be completed as a weekend parts swap and energized for passengers without the required permit and inspection. The correct sequence is to confirm the permit before work, keep the unit out of service, complete the alteration, perform the required tests, and schedule the AHJ inspection. If the owner refuses, the mechanic should not energize the elevator for public use and should document the refusal in writing.

The pit access deficiencies are not cosmetic. A 48 in pit exceeds the 3 ft threshold at which a permanent pit ladder is required, so the missing ladder must be addressed as part of the alteration package; a portable ladder is not an acceptable permanent substitute. The pit stop switch must be secure and operational because it is the required means to stop the elevator from the pit. The pit light must work so pit work can be performed safely, and a GFCI receptacle is required in the pit. These items affect safe access and maintenance and should be corrected before the elevator is returned to service, not deferred. The missing car-door restrictor is a separate existing-installation question: it must be evaluated under the applicable A17.3 requirements for existing elevators and cannot be ignored simply because the power unit is being replaced. The correct approach is to make a written deficiency list, correct the items that are part of the alteration scope or that create an immediate hazard, and document any existing-installation item that requires a separate compliance plan. Logging a known pit-access hazard and returning the elevator to service would not be defensible.

The mechanic should stop before energizing the elevator and put the refusal in writing. Maryland requires elevator work to be performed by properly licensed personnel and requires permits and inspections for alterations. Proceeding without the permit would expose the mechanic and contractor to enforcement action, including fines, stop-work orders, and discipline against the elevator mechanic license. It would also leave the building owner without a valid acceptance inspection for the altered equipment. The practical steps are: (1) notify the contractor and owner in writing that the alteration requires a permit and inspection; (2) keep the elevator out of service and tagged; (3) notify the AHJ if the owner insists on occupancy; and (4) preserve the inspection and test records. The mechanic should not sign or imply that the elevator has been accepted. A verbal assurance that “it passed last year” does not substitute for the required alteration permit and inspection. If the owner later authorizes the permit, the job can proceed in the proper sequence.