The applicability of FAR 121.377 is not eliminated by a person's performing a mix of work such as you describe. Such an interpretation would defeat the purpose of the regulation which is to insure that person's performing part 121 maintenance or preventive maintenance are provided relief from duty.
The cause of rheumatoid arthritis is unknown, although it appears to be an autoimmune disease. When the body's immune system does not operate as it should, white blood cells that normally attack bacteria or viruses attack healthy tissue instead â in this case, the synovium, or joint tissue.
Rheumatoid arthritis is a disease where the immune system attacks the lining of some joints. This cause pain and swelling in those joints.The cause of rheumatoid arthritis is not completely understood. We know that it effects women more than men and that it is more common in people that smoke.his cause pain and swelling in those joints. The cause of rheumatoid arthritis is not completely understood. We know that it effects women more than men and that it is more common in people that smoke.