The technical meaning of maintenance involves functional checks, servicing, repairing or replacing of necessary devices, equipment, machinery, building infrastructure, and supporting utilities in industrial, business, and residential installations. Over time, this has come to include multiple wordings that describe various cost-effective practices to keep equipment operational; these activities occur either before or after a failure.
A tractor being mechanically repaired in Werneuchen, 1966
Field repair of aircraft engine (1915–1916)
Road repair
C-130J Hercules preventive cleaning at Keesler Air Force Base, Mississippi after a period of operation over the Gulf of Mexico (salt and moisture which lead to active corrosion require regular cleaning)
Aircraft maintenance is the performance of tasks required to ensure the continuing airworthiness of an aircraft or aircraft part, including overhaul, inspection, replacement, defect rectification, and the embodiment of modifications, compliance with airworthiness directives and repair.
An Airbus A321 from Iberia having its CFM56 changed
Technicians work on a Bombardier airplane in Dallas, Texas.
Field maintenance on a Cessna 172 being conducted from a van used to carry tools and parts
A Panavia Tornado undergoing maintenance
