📄 Engine's mechanical specifications (A20NFT/LHU)
📄 Tightening specifications for fasteners (A20NFT/LHU)
📄 Adhesive, fluids, lubricants and sealants (A20NFT/LHU)
📄 Specifications for thread repair (A20NFT/LHU)
📄 Identification of engine (A20NFT/LHU)