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Option 11C and 11C Mini Technical Reference Guide
196
Chapter 5 — Spares planning
Contents
This section contains information on the following topics:
Reference List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Definitions and assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Calculating spares requirements . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Failure rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
NFT values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
NTAK76 battery back-up unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
NTAK75 extended battery back-up unit . . . . . . . . . . . . . . . . . . . . . . . . 195
Reference List
The following are the references in this section:
• Option 11C and 11C Mini Fault Clearing (553-3011-500)
Introduction
Spares planning is used to determine desired inventory levels of spares
(replaceable) items. Spares planning is used by repair houses and centralized
depots in order to ensure that there is an adequate stock of replaceable items
on hand.
This section will provide the information necessary to calculate spares for the
Option 11C system.