turn-around maintenance

management by walking around (wandering around)

turn-around inspection

turn-around servicing

180º turn / U-turn

U-turn / 180º turn

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

special maintenance / contingency maintenance

all-around security

go around the flank

knife-edge around

perimeter defense (all-around defense)

all-around field of fire

all-around field-of-fire emplacement

all-around efficiency

all-around vision

around-the-clock fire support

drive around

all-around fire trench

frame around opening

walk-around inspection

turbulent flow around a body

flow around a body

go-around (GA)

no-go-around situation

around-the-clock fire support capability

draw a pocket (around the enemy)