Subjgrp 193. General
- § 27.1301 - Function and installation.
- § 27.1303 - Flight and navigation instruments.
- § 27.1305 - Powerplant instruments.
- § 27.1307 - Miscellaneous equipment.
- § 27.1309 - Equipment, systems, and installations.
- § 27.1316 - Electrical and electronic system lightning protection.
- § 27.1317 - High-intensity Radiated Fields (HIRF) Protection.