# -*- mode: org; -*-

#+TITLE: DO-160
#+SUBTITLE: Environmental Conditions and Test Procedures for Airborne Equipment.
#+AUTHOR: Marius Peter
#+DATE: <2022-02-11 Fri>
#+EMAIL: mlnp@tuta.io

#+DESCRIPTION: Environmental Conditions and Test Procedures for Airborne Equipment.
#+KEYWORDS: aerospace, rtca, DO-160


#+begin_abstract
The DO-160 document is a standard for environmental testing for
airborne equipment published by the RTCA.
#+end_abstract


* Introduction

  https://do160.org/rtca-do-160g/

  
* Equipment categories

Equipments are categorized as a function of the environments to which
they are subjected during normal operation.

  
* Sections

Sections 7 and 8 are aircraft dependent.


** List
:PROPERTIES:
:HTML_CONTAINER_CLASS: big-table
:END:

#+NAME: sections
#+CAPTION: List of DO-160 section.
|  § | Name                                     | Concerns the effects of...                                                         | Parameters of interest                                                     |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
|  1 | /Introductory sections/                  | /N/A/                                                                              | /N/A/                                                                      |
|  2 |                                          |                                                                                    |                                                                            |
|  3 |                                          |                                                                                    |                                                                            |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
|  4 | Temperature                              | Temperature on the system.                                                         | Temperature, condensation.                                                 |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
|  4 | Altitude                                 | Altitude & cabin depressurization on performance.                                  | Dielectric strength, (rapidly) varying air pressure.                       |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
|  5 | Temperature Variation                    | Extreme temperature changes.                                                       | Temperature delta, thermal expansion coefficients.                         |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
|  6 | Humidity                                 | High concentrations of humidity; ability to withstand moisture effects.[fn:1]      | Hygrometry.                                                                |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
|  7 | Shock & Crash safety                     | Mechanical shock. Ensures the item does not become a projectile in a crash.        | Potential for projectile behavior.                                         |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
|  8 | Vibration                                | Vibrations.                                                                        | Normal operation in all vibration scenarios.                               |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
|  9 | Explosion proofness                      | Vacuum + gaseous mixture of combustibles.                                          | The unit must be operable without igniting the environment.                |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 10 | Water proofness                          | Dripping water or pooled water.                                                    | Normal operation after exposure.                                           |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 11 | Fluids susceptibility                    | Various fluids including carbonated sugared beverages and cleaners/solvents.       | Normal operation after exposure.                                           |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 12 | Sand & Dust                              | Blowing sand and dust of specific particle sizes.                                  | Normal operation after exposure.                                           |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 13 | Fungus Resistance                        | Fungi under conditions favorable for their development.[fn:3]                      | Fungal proliferation.                                                      |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 14 | Salt & Fog                               | Multiple exposures of salt fog and drying; environmentally accelerated corrosion.  | Normal operation after exposure.                                           |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 15 | Magnetic effect                          | Magnetic effects on the aircraft's compass.                                        | Normal aircraft compass function.                                          |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 16 | Power input                              | Input power emissions, susceptibility, transients, drop-outs, hold-up.[fn:2]       | Voltage, current, phase.                                                   |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 17 | Voltage spike                            | Voltage spikes caused by input power.                                              | AC/DC voltage.                                                             |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 18 | Audio Frequency Conducted Susceptibility | Frequency components during normal operation.                                      | Power source harmonics.                                                    |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 19 | Induced Signal Susceptibility            | Induced voltages in the equipment interconnect circuit configuration.              | power frequency harmonics; audio frequency signals, electrical transients. |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 20 | RF emission and susceptibility           | Normal operation on radio frequency emission energy and susceptibility.            |                                                                            |
| 21 |                                          |                                                                                    |                                                                            |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 22 | Lightning susceptibility                 | Direct and indirect effects, depending on location.                                | induced transients in the airframe or wire bundle.                         |
| 23 |                                          |                                                                                    |                                                                            |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 24 | Icing                                    | Icing conditions arising from rapid changes in temperature, altitude and humidity. | Presence of ice.                                                           |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 25 | ESD                                      | ESD in handling and operation.                                                     | ESD.                                                                       |
|----+------------------------------------------+------------------------------------------------------------------------------------+----------------------------------------------------------------------------|
| 26 | Flammability                             | Normal operation on presenting a fire hazard.                                      | Normal operation not causing a fire.                                       |


* Footnotes

[fn:3] This includes high humidity, a warm atmosphere, and the
presence of inorganic salts.

[fn:2] Full flight mission must be considered, from prior to the
engine start, to after landing---including emergencies.

[fn:1] Moisture sensitive devices may experience issues with this test
and require conformal coat or other types of protection.