Here at ASAP AOG, we carry MRO 55E89-1 from the (Plate-Diaphragm) class as well as other parts produced by responsible companies like Honeywell Inc. We supply over 6 billion new, old and obsolete aircraft MRO parts, and aircraft maintenance parts. As the only independent distributor with a No China Sourcing pledge, our team has established a strong trusting relationship with our customers.