Upgrade of the S6135-20600 series main gearbox by replacing input free-wheeling units in accordance with Carson drawing. IFWU INSTL Carson S-61 No. CHI-R-001, no revision, dated 12-15-04 and Carson Installation Instructions Report CHI-R-INSTALL, no revision, dated 12-14-04.

Please contact modification supplier for further details.

STC Status: Issued
STC Date: 10/02/05
Responsible Office: New York Aircraft Certification Office (ANE-170), Tel: (516) 228-7300

Sikorsky Aircraft Corporation

• S-61A
• S-61L
• S-61N
• S-61NM