Extension of main rotor blade, P/N 61170-20201 series. For model S-61A, serial numbers 61-063, 61-147, 61-232, 61-272; for model S-61N, 61-216, 61-220, 61-242, 61-744; for model S-61R, 61-551.

Please contact modification supplier for further details.

STC Status: Amended
STC Date: 17/10/03
Responsible Office: New York Aircraft Certification Office (ANE-170), Tel: (516) 228-7300

Sikorsky Aircraft Corporation

• S-61A (U.S. Navy HSS-2)
• S-61A (U.S. Navy SH-3A)
• S-61A (USAF CH-3B)
• S-61N
• S-61R (USAF CH-3C)
• S-61R (USAF CH-3E)