Purpose

• To determine the impact of a change on the units which have shipped.

Applicability

• All changes which are processed by this CM group.

Policy/Practice

• If the units that have shipped are to be changed by retrofit or return goods repair, it shall not be a result of an interchangeable change.
• Field units to be retrofit should be a result of certain non-interchangeable changes. All non-interchangeable changes are not to be retrofit. Each must be considered on its own merits.
• Allowable categories of retrofit are defined as follows (determine your own categories):
  1. Recall – all units not containing this change must be found/returned to be retrofit. Typically limited to significant safety issues.
  2. At Maintenance – all units not containing this change must have it incorporated when the product is shut down for any regular or special maintenance.
  3. Customer Option – any unit the customer wishes to have this change in will be retrofit on a basis determined by the customer.
  4. On Return – to be retrofit on return to the factory for any reason.
• The field repair organization will retrofit on repair any or all categories of changes above as the customer wishes. The cost of retrofitting all units affected per the above will be included in the change cost calculations and estimates.
• No other changes will be retrofit on repair. Bringing all units to the “latest revision level” or installing changes not so designated is very expensive and will not be done.
• All failed items, worn items or damaged items will be replaced on repair to make the product “like new.” The cost of such activity, however, will not be included in the change cost.

Procedure

• On any change checked “Retrofit: Yes,” the cognizant design engineer must get the Service functions agreement and signature on the change form.
• The Service function will initiate the Field Change Form per that standard.

Primary Responsibility

• CM function will have responsibility for maintaining this standard.
• The cognizant design engineer and service representative may take exception to this standard providing they agree and indicate on the change form why that was done.

Authorization