What is the difference between Rotable, Repairable, expendable and consumbale aircraft Spares ?

Question

I would you to kindly give me detail reponse. I will also appreciate any references to websources for further reading.

Answer 1

Rotable: Anything that needs periodic replacement. Engines, generators, pumps, actuators, tires, etc.

Repairable: Any component that is typically repaired and returned to service as repaired/overhauled or "as new" conditon. Engines, generators, pumps, large actuators, many electric motors, etc.

Expendable: Any component that is discarded at the end of its useful life, i.e is not worth repairing or cannot be repaired or overhauled due to it's construction. Hoses, some brake components, small actuators, switches, etc. Expendables can normally be removed from service on one aircraft or assembly and reused if still in serviceable condition.

Consumable: Any component that is rendered unsuitable for reuse when it's installed. Gaskets, sealants, compression fittings, etc.

Answer 2

Expendables Definition

Answer 3

This Site Might Help You.

RE:
What is the difference between Rotable, Repairable, expendable and consumbale aircraft Spares ?
I would you to kindly give me detail reponse. I will also appreciate any references to websources for further reading.

Answer 4

Bostonian is correct.

However, what determines if the item is a Rotable (needs periodic replacement) is the maintenance program that the aircraft is on. All commercial aircraft have a maintenance program that is approved (in the US) by the FAA, and it is strictly adhered to. It is typically generated by the manufacturer. In Boeing and Airbus' case, the document is called "Maintenance Planning Data" commonly referred to as the MPD.

The larger air carriers are allowed to deviate from this by using reliability data that they develop over the years of experience with the aircraft.

In either case, they may require that certain parts are routinely overhauled in order to prevent problems with them during usage. An example of this would be a rotoray actuator on the leading edges of a B757-200. These units (there are 2 per slat, for a total of 20) must be replaced with overhauled units every 20,000 cycles.

Answer 5

Definition Of Expendable

Answer 6

First of all, I agree with Bostonian. It is up to the operator in some cases to determine what is what. At my company, we use these rules of thumb (there are exceptions to any rule).
Rotables : any part with a tracked serial number.
Repairables: anything above a set dollar amount that has overhaul criteria and is tracked by records. It does not need to be a serialized part. (tracked by batch number)
Expendable: any part below a set dollar amount that does not have repair criteria or it is cheaper to buy than repair.
Consumable: any part that is used once and then discarded.
Our parts tags, equivilant to an 8130, list parts as;
R- rotables- engines, actuators, avionics boxes, flight controls, etc.
F- repairable- structural fittings, exterior panels, etc
E- expendable- hoses, o rings, gaskets, rivets, hardware, etc

Answer 7

could you advise what is the difference between class :- A , B & C Materials.
My email : [e-mail]