# Compliance evidence pack (UNOFFICIAL)

- **Question:** UFC 3-520-02
- **Generated:** 2026-07-21 17:00 UTC
- **e-Publishing catalog checked:** 2026-07-12
- **Supplement layer:** none selected
- **Source:** CheckMyAFI (https://checkmyafi.com) — unofficial reference

> **UNOFFICIAL — VERIFY BEFORE CITING.** Quotes come from indexed copies of public publications. The certified PDF on e-Publishing is the only authoritative source. Your MAJCOM/unit supplement may be stricter.

## Synthesized answer (unofficial)

I need a specific question about UFC 3-520-02 to answer. The passages provided show that UFC 3-520-02 is titled "Facility Energy System Resilience and Reliability" [UFC 3-520-02], current as of 27 July 2023 with Change 1 dated 29 January 2025, but they contain only page headers, a glossary of acronyms/formulas (including MTBF, MTTR, MDT, and reliability calculations), and cross-references from other UFC publications.

What is your specific question about UFC 3-520-02? For example, are you asking about:
- Requirements for facility energy system design?
- Reliability metrics or calculations?
- Resilience standards?
- A particular section or appendix?

Please provide your question so I can answer from the indexed passages.

Unofficial — answered from indexed publication text, which may be incomplete or out of date. Your MAJCOM/unit supplement may be stricter. Verify the official PDF before acting or writing a finding.

## Controlling Air Force guidance (quoted)

**DAFI 21-101 para 15.8.11, p. 268** (effective/current as of 2026-03-16)

> ates. (T-2) 15.8.9.1. Electrical power system design will be IAW AFMAN 32-1062, Electric Systems, Power Plants and Generators, AFMAN 32-1065. Reference UFC 3-501-01, Electrical Engineering, UFC 3-520-01, Interior Electrical Systems, UFC 3-530-01, and UFC 3-550- 01, Exterior Electrical Power Distribution, UFC 3-600-01, Fire Protection Engineering for Facilities, and Engineering Technical Letter 02-15, Fire Protection Engineering Criteria - New Aircraft Facilities. 15.8.10. The cost of running power (such as, lighting, and electrical) from prime or temporary power sources to the sunshades will be included in the cost estimate and will be borne by the owning unit. (T-2) 15.8.11. In no case will the loss of parking spots resulting from the purchase or installation of aircraft sunshades be a pr

Official source: https://static.e-publishing.af.mil/production/1/af_a4/publication/dafi21-101/dafi21-101.pdf

## Supplement deltas

_No supplement passage retrieved — check the supplement chain before citing._

## Federal / DoD standards implemented (quoted)

_No federal/DoD passage retrieved._

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Retrieval confidence: 100.0 · CheckMyAFI is not an official Air Force product. Verify every citation against the certified publication.