Group 1 - AAR Corp. is recognized as an undervalued aerospace stock, with a recent multiyear support services extension signed with Cebu Pacific [1][2] - The deal involves Airinmar, a subsidiary of AAR Corp., providing component repair cycle management and aircraft warranty management to Cebu Pacific, which will help reduce maintenance and repair costs [1][2] - Cebu Pacific currently operates 100 aircraft and has over 100 more on order, indicating significant growth in its fleet [2] Group 2 - AAR Corp. offers a range of aerospace and defense aftermarket solutions, including aircraft parts sales, maintenance and repair services, and fleet operations management [2]