APU Availability Report 2026-2028 | GTCP131-9 & APS3200 Shortage | Safe Fly Aviation APU Availability Report 2026-2028 GTCP131-9 and APS3200 shortage analysis: lead times, OEM constraints, exchange programs, and strategic solutions for operators worldwide. Safe Fly Aviation Team June 2026 12 min read Honeywell GTCP131-9...