Shop-replaceable unit

A shop-replaceable unit (SRU) or shop-replaceable component (SRC) is a modular component of an airplane, ship or spacecraft that is designed to be replaced by a technician at a backshop. Repair at backshops is known as field-level maintenance or intermediate-level (I-level) maintenance.[1]

SRUs are similar in nature to line-replaceable units (LRUs), but rather than being complete functional units, represent component functions, such as circuit card assemblies, of a larger LRU. SRUs are typically assigned logistics control numbers (LCNs) or work unit codes (WUCs) to manage logistics operations.[1]

SRUs can be stocked to allow for quick remove and replace (R&R) operations on their parent LRUs or LLRUs, while also allowing for more extended repair operations at the backshop.[1]

Calibration and repair of United States Air Force test equipment is conducted at shops known as precision measurement equipment laboratories.

See also

References

  1. 1 2 3 Kritzinger, Duanne (2017). Aircraft System Safety: Assessing and Managing Hazards in Complex Aviation Systems. Woodhead Publishing. p. 399. ISBN 9780081009321.
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