Oliver Holmes Engineering has years of experience in ATR maintenance on all ATR types, so we can provide reliable support. Heavy structural repairs, prepurchase inspections, line maintenance, all CCA and CFH-Checks, 33,000 and 36.000 Cycle Checks, SBs, maintenance cost calculation, sourcing special tools and spare parts for difficult spare parts, and logistical solutions are among the areas of expertise. Almost any question about ATR maintenance can be answered with practical and affordable guidance.