937．Maintenance Practices which are a combination of servicing, removal installation, adjustment/ testinspection / check, cleaning /painting, and approved repairs should follow the Troubleshooting Section. 维护实践包括维修、拆卸安装、调整/测试检查/检查、清洁/喷漆和经批准的维修，应遵循故障排除部分。

551、If the Specification is used to prepare a Continuing Airworthiness Program for acceptance by an airworthiness authorityother than FAA the appropriate authority and its regulations may be substituted.

550、If the pump Tis unserviceable ,replace it

549、if the probes touch each other ,they can become demagnetized

548、If the indications do not clearly show that a fastener is loose, make a red line across the head and the adjacent material.

547、If the circuit breaker opens, de-energize circuit.

546、If the airplane has a built in auxiliary power unit, describe it and explain how it fits in with the electrical system.

545、If the airplane experiences repeated failures of ta pump at one location, there may be debris in the case drain line, casedrain hose or case drain hose quick disconnect that cannot be flushed by accomplishing this procedure.

544、If the air intake flap is not serviceable, do the deactivation procedure of the air inlet valve.

543.If one or more blades are missing make an entry in the engine logbook

542、If it is possible that the temperature values will be more than the permitted limits, decrease the power.