Hence the importance of a good inspection department with the authority to reject substandard parts.
Actually most of the unique parts for transport catagory aircraft now in use are still manufactured today. I would expect it's difficult to find parts for a JT3D powered 707-100 or DC-8, but other than that most are still available in both new and rebuilt condition.
Even discontinued aircraft such as the L-1011, MD80 and F-28/F-100 family still have parts being manufactured for them either by the original equipment manufacturers (OEMs) or by companies who have purchased the FAA Parts Manufacturing Authorizations (FAA-PMA) from the original manufacturer.
Whether new or rebuilt, there are rather exacting standards the parts must meet. Standards easily verified by the multiple inspections, visual and non-destructive, each part must go through before being installed on an aircraft.
Even with all that; parts still fail and machines still break. These things operate at 400 Kts, six miles above the earth - mechanical or electrical failure are inevitable. If you don't want it to break, don't fly it.
Actually most of the unique parts for transport catagory aircraft now in use are still manufactured today. I would expect it's difficult to find parts for a JT3D powered 707-100 or DC-8, but other than that most are still available in both new and rebuilt condition.
Even discontinued aircraft such as the L-1011, MD80 and F-28/F-100 family still have parts being manufactured for them either by the original equipment manufacturers (OEMs) or by companies who have purchased the FAA Parts Manufacturing Authorizations (FAA-PMA) from the original manufacturer.
Whether new or rebuilt, there are rather exacting standards the parts must meet. Standards easily verified by the multiple inspections, visual and non-destructive, each part must go through before being installed on an aircraft.
Even with all that; parts still fail and machines still break. These things operate at 400 Kts, six miles above the earth - mechanical or electrical failure are inevitable. If you don't want it to break, don't fly it.