You must take corrective action if any flow tube or the breathing circuit pressure
gauge fails any test.
a. Corrective Action for Flow Tube Failure. If the flow tube fails to calibrate,
execute the following steps in the order given.
(a) Remove the valve stem and seat of the affected flow tube.
(b) Replace the valve stem and seat of the affected flow tube.
(d) Execute step 2 if the flow tube fails to calibrate.
(a) Remove the entire flow tube assembly (flow tube, float, gaskets,
scale, and seals) affected.
(b) Replace the entire flow tube assembly.
Recalibrate the unit.
(d) Evacuate the unit to depot level maintenance if the unit still fails to
calibrate. To do this, you must prepare a work order for depot maintenance, repack the
unit in a shipping container with the work order inside, and send it.
b. Corrective Action for Pressure Gauge Failure. Replace the gauge if it is
reading inaccurately during any of the tests. Refer to the manufacturer's service
literature or the manufacturer's service representative for further information on
replacing malfunctioning components of the anesthesia apparatus.