Includes
Oxygen Pressure Signals and Warning Devices; such as Air Pressure Warning Signals, Aircraft Crew Warning Signals, Altitude Warning Signals, Alarm Controls, Audible Landing Gear Alarms.

Excludes
Aircraft Engine Oil and Fuel Warning Devices.

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
334290 – Other Communications Equipment Manufacturing
561621 – Security Systems Services (except Locksmiths)
333999 – All Other Miscellaneous General Purpose Machinery Manufacturing
334419 – Other Electronic Component Manufacturing
423610 – Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
811219 – Other Electronic and Precision Equipment Repair and Maintenance
488190 – Other Support Activities for Air Transportation
336412 – Aircraft Engine and Engine Parts Manufacturing