The phrase "as proper maintenance" is correct and usable in written English.
It can be used when discussing the importance or necessity of maintaining something in an appropriate manner.
Example: "The equipment will function optimally only if it is used as proper maintenance is followed regularly."
Alternatives: "as adequate upkeep" or "as suitable care".
The study revealed that the faculties shared similar problems such as no proper maintenance documentation, no local suppliers for spares and inadequate expertise.
The ride was also heavily criticised as "unsafe" as it had no proper maintenance schedules, and extensive cracking and corrosion, with parts of the structure "propped up with timber".
Through this diversity, Sox2 and its partner proteins are able to precisely control both the expression of the gene networks necessary for the proper maintenance of ESC, as well as the programs necessary to direct differentiation and development.
The proper use of the machine during its operation phase and its proper maintenance as intended by the designer also play a vital role in keeping the machine safe.
Evaluation of pavement performance along with proper maintenance and rehabilitation (M&R) activities as well as application of high quality construction materials can prevent premature failures in road networks and supply safety and convenience for road users.
Such data must be reported to the State as an indication of whether proper maintenance and operating procedures are being utilized by source operators to maintain emission levels at or below emission standards.
Furthermore, a host of cytoskeletal proteins [ 178], as well as local protein translation [ 197], is required for the proper maintenance and turnover of dendritic spines.
Writing of one rural development programme, the report cites "leakages, misappropriation of funds, violation of programme guidelines, selection of the non-poor as a target group, absence of proper maintenance of accounts and poor quality of assets".
The energy savings achieved by implementing energy efficiency (EE) lighting retrofit projects are sometimes not sustainable and vanish rapidly given that lamp population decays as time goes by if without proper maintenance activities.
