BOEING INTRODUCES PORTABLE MAINTENANCE AID With the Boeing-developed Portable Maintenance Aid (PMA), aircraft line mechanics can quickly troubleshoot technical problems at the gate, instead of searching through volumes of maintenance manuals that are usually located a considerable distance away. The PMA is actually a digital database containing key maintenance documents and retrieval software and is loaded into a portable computer. It also may be used effectively in a desktop computer or office network. News and Media Kits From Paris | Commercial Airplanes | Commercial Airplanes @ Paris