---
kind: "section"
citation: "14 C.F.R. § 25.1705"
title: "14"
number: "25.1705"
heading: "Systems and functions: EWIS."
url: "https://uscodex.org/cfr/14/25.1705"
---

# §25.1705. Systems and functions: EWIS.

- (a) EWIS associated with any system required for type certification or by operating rules must be considered an integral part of that system and must be considered in showing compliance with the applicable requirements for that system.
- (b) For systems to which the following rules apply, the components of EWIS associated with those systems must be considered an integral part of that system or systems and must be considered in showing compliance with the applicable requirements for that system.
  - (1) [§ 25.773(b)(2)](/cfr/14/25.773.md?p=b-2) Pilot compartment view.
  - (2) [§ 25.981](/cfr/14/25.981.md) Fuel tank ignition prevention.
  - (3) [§ 25.1165](/cfr/14/25.1165.md) Engine ignition systems.
  - (4) [§ 25.1310](/cfr/14/25.1310.md) Power source capacity and distribution.
  - (5) [§ 25.1316](/cfr/14/25.1316.md) System lightning protection.
  - (6) [§ 25.1331(a)(2)](/cfr/14/25.1331.md?p=a-2) Instruments using a power supply.
  - (7) [§ 25.1351](/cfr/14/25.1351.md) General.
  - (8) [§ 25.1355](/cfr/14/25.1355.md) Distribution system.
  - (9) [§ 25.1360](/cfr/14/25.1360.md) Precautions against injury.
  - (10) [§ 25.1362](/cfr/14/25.1362.md) Electrical supplies for emergency conditions.
  - (11) [§ 25.1365](/cfr/14/25.1365.md) Electrical appliances, motors, and transformers.
  - (12) § [25.1431(c)](/cfr/14/25.1431.md?p=c) and [(d)](/cfr/14/25.1431.md?p=d) Electronic equipment.

## Notes

### Source

Source: Docket No. FAA-2004-18379, 72 FR 63406, Nov. 8, 2007, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702 and 44704; Pub. L. 115-254, 132 Stat 3281 (49 U.S.C. 44903 note).

### Source

Source: Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted.