Activities in Level 3 were divided over four main operations: production, quality, logistics and maintenance.

Many private airlines operate out of Zaire, with relatively few controls over safety and maintenance.

The commissioners also function as the county drainage board, exercising control over the construction and maintenance of legal drains.

The total monthly shortfall of rents over maintenance was $2,000, or $250 for each resident shareholder.

The plants were temporarily taken out of service last year after a scandal over falsified inspections and poor maintenance.

This led to disputes over maintenance and over who should control the vendors.

Orders for supplies or services identified as "red ball" are given highest priority, taking precedent over other more routine maintenance and service work.

Ever since Constant had taken over maintenance of the pool, the algae had been building up.

The highway commissioner was also given complete control over the planning and maintenance of the state trunklines.

Over time, and without proper maintenance, they can become unserviceable.