gambit
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My opinion is at least 20yrs. This is assuming these F-16s will not be used the way the USAF and other Western powers uses theirs, which are more stressful, and that these Asian customers follows strict periodic maintenance schedules.Could you give an opinion as to how many years of typical operating life you expect that the newly received, upgraded Indonesian F-16s would have? As I understand, the upgrade and life extension that those aircraft have received is very comprehensive. I believe they are upgraded to Block 52 standard and at a total price of $31 million a pop (everything included), that's not bad at all. I think it would be very possible for Vietnam to receive a similar deal.
Aside from the typical 'repairs as needed' situations that are simply unpredictable, there are two major forms of periodic maintenance:
- Phase
- Depot
Phase maintenance is organizational level, meaning that air force can perform on its own.
Aircraft maintenance: It's just a phase > U.S. Air Force > Article Display
"We break down the jet, tear it apart and put it back together," said Tech. Sgt. Michael Schuler, a 442nd MXS phase dock technician. "A flying product is a working product; we open up all panels to inspect engine, frame, canopy and other critical components for any discrepancies."
The crews operate in two different phases, which are based on the amount of time necessary to breakdown the aircraft, the severity of any discrepancies and what repairs are needed.
"Every 500 flight hours, a jet is brought into a phase," said Senior Master Sgt. Kellie Askew, the 442nd MXS phase dock flight chief. "When one is rolled in, it takes approximately 15 days to complete a number one phase. A number two phase is more critical and can last from 19 to 20 days. In between these phases, we sometimes have a week break but other times we roll right from one phase into the next."
Depot maintenance is much more intensive, more time consuming, and essentially is manufacturer's level. It does not mean the manufacturer must perform the inspection, it mean the level of tear down and rebuild requires manufacturer's level of resources. The jet is stripped down even more in-depth than the phase maintenance.
14292_13
Depot-level maintenance supports O- and I-levelsof maintenance by providing engineering assistance and performing maintenance that is beyond the capability of O- and I-level activities. Depot maintenance is work that must be done in an industrial-type facility. Such a facility may either be civilian, military, or both. If the work is contracted out to a civilian facility, the type of work is still depot maintenance.
A simple example...
At phase maintenance, the wire harness is inspected, cleaned, and repaired if necessary, but essentially left in place.
At depot level maintenance, the wire harness will be removed from the aircraft, put on an electrical bench tester for various checks, connections are disassembled and replaced, then reinstalled. However, throughout the flow, if the inspector judge the harness unacceptable at any point, it is discarded and a new one built.
Literally any part that can be removed -- will be removed -- including major structures like the wings. Non destructive inspection (NDI) ranging from stress to X-ray testings will be performed, especially on critical airframe structures. Fuel tanks are chemically cleaned and/or bladders are replaced if necessary. All avionics are bench tested and replaced if necessary. All pneudraulics components are rebuilt.
Kunsan Air Base - Media Gallery
In the above media source from Kunsan AFB, South Korea, there are a couple of images that shows just a glimpse of the differences between the two types of major periodic maintenance.
If Indonesia or any customer follows these schedules, these used jets will serve them for a long time.