unscheduled preventive maintenance

unscheduled maintenance

crew (preventive) maintenance

preventive maintenance checks and services (PMCS)

preventive-maintenance overhaul

preventive maintenance

periodic preventive maintenance service

unscheduled safing procedure

unscheduled radio contact

unscheduled repair

unscheduled flight

preventive & precautionary measures

preventive deployment

preventive diplomacy

preventive medicine (PVNTMED)

preventive options

United Nations Preventive Deployment Force (UNPREDEP)

preventive action

preventive deployment force

wear-preventive additive

preventive inspection

wear-preventive

corrosion-preventive treatment

preventive repair

preventive actions

preventive inoculation

contingency maintenance / special maintenance

depot maintenance (beyond O and I level activities, performed in an industrial-type facility) / D-level maintenance

maintenance checks / routine maintenance, scheduled tasks

maintenance idling (periodic running of engine for maintenance purposes)

organizational maintenance (O-level) (day-to-day work that standard airfield maintenance groups perform in support of airfield operations)

routine maintenance / scheduled tasks, maintenance checks

scheduled tasks / routine maintenance, maintenance checks