Installation of Collier Model 1AC internally mounted ADF sense antenna.

Please contact modification supplier for further details.

STC Status: Amended
STC Date: 21/11/68
Responsible Office: Chicago Aircraft Certification Office (ACE-115C), Tel: (847) 294-7358

Twin Commander Aircraft Corporation

• 500
• 500-A
• 500-B
• 500-S
• 500-U
• 560
• 560-A
• 560-E
• 560F
• 680
• 680-E
• 680-F
• 680FL
• 680FL(P)
• 680V
• 680W
• 720