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  • English (United States)

Mason and Janco Customer Service

After-Sales Support

Spares and AOG Support

List of distributors and brokers for commercial spares, airline AOG support, and military spares

Product Returns

To arrange for product returns, please contact us at:

Tel: 818-361-3366, ext. 1357


Technical Support

Email for Mason products:

Email for Janco products:

Searchable index of component maintenance manuals, service bulletins, and service information letters 

QA Support

Quality documentation



Sales Help

Sales Reps

Find a sales representative near you in the US or another country.

Purchase Orders

Please submit purchase orders for Mason products to

Buy a Janco Series A Rotary Switch

Product request form for Series A rotary selector switches


General Inquiries

Tel: 818-361-3366

Email for Mason products:

Email for Janco products:

Mailing address:
13955 Balboa Boulevard
Sylmar, CA 91342




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