As was pointed out in the above post by dsanabrea, 7.5.1f and 7.5.1.4 are somewhat redundant.
The IAQG in their clarifications of AS9100C adds some interesting insight.
7.5.1.4
If a company does not provide service to products after the part is delivered to a customer, can they take exclusion to clause 7.5.1.4?
It depends. IAQG 9100, Clause 7.5.1.4, Post-Delivery Support, is applicable when servicing of your product is performed after initial delivery. The location of the service is irrelevant no matter whether the servicing is taking place at your facility or in the field. If a warranty is applicable to the product, then the servicing clause 7.5.1.4 is applicable.
Since Clause 7.5.1.4 is contained in section 7, it is possible to take a justified exclusion for portions of this clause that may not be applicable.