An acronym for remembering all the FAA-required maintenance operations ***Meaning*** :: <u>A</u>nnual, <u>A</u>Ds <u>V</u>OR, <u>1</u>00 Hour, <u>A</u>ltimeter, <u>T</u>ransponder, <u>E</u>LT ***Details***: A - Annual Inspection / every 12 calendar months (§ [[FAR 91.409 Inspections|91.409]]) A - [[AD|AD]]s complied with (§ [[FAR 91.409 Inspections|91.409]]) V - VOR check / every 30 days (IFR only) (§ [[FAR 91.171 VOR Check|91.171]]) 1 - 100 hour inspection (if for training or hire) (§ [[FAR 91.409 Inspections|91.409]]) A - Altimeter (pitot static) / every 24 calendar months (IFR only) (§ [[FAR 91.411 Altimeter and Pitot-Static Inspections|91.411]]) T - Transponder / every 24 calendar months (§ [[FAR 91.413 Transponder Inspections|91.413]]) E - ELT / every 12 calendar months, 1 hour cumulative or 1/2 battery life (§ [[FAR 91.207 Emergency Locator Transmitter|91.207]], [[121.5 for ELT Usage Regs]]) #acronym