STC SH770NW

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number S1770N4 This certificate issued to: Onboard Systems Purt 6 of the CIVil Air Regulations:

Original Product -TypeCertificate Number: 1H4 1H11 Make: Sikorsky Sikorsky Model: (See Continuation Sheet) (See Continuation Sheet) Descriplion Type Designestation raving a merre brationitar. : Installation of a weighing system in accordance witr Systems Model H-46 Cargo Hook Load Cell System in accordance with FAA approved Onboard System Master Drawing List No. 155-008-00, dated January 10, 1990, or later FAA approved revision; and, Installation of this system in accordance with FAA approved Onboard Systems Owners Manual No. 120-014-00, Revision "B", dated October 20, 1989, Limitations and Conditions: Approval of this change in type design applies to the above model helicopters only. This approval should not be extended to other helicopters of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the relationship between this change and any of those other previously approved moditications, including changes in type design, will introduce no adverse effect upon the airworthiness of that helicopter. (See Continuation Sheet)

Date of Application: March 19, 1979 Jule missued: August 2, 1990 Date of Issuance: May 15, 1979 Jale unended: August 2, 1990 FEDERAL AVIATION By Direction of the Administrator Btenant him illen ( Sighature) TAMINISTRAIO Assistant Manager, Seattle Aircraft Certification Office (Title)

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United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SH770N4 MODEL 1H4 - S-55, S-55B, S-55C 1H11 - S-58A, 5-58B, 5-586, 5-580, 5-581, 5-58F, 5-586, 5-587, 5-580, 5-98B1, S-58DT, S-58ET, S-58FT, and S-58HT Description of Type Design Change: (continued) or later FAA approved revision. Inspect load cell in accordance with Section 4.6 of Onboard Systems Owners Manual No. 120-014-00, Revision "B", dated October 20, 1989, or later FAA approved revision.

Limitations and Conditions: (continued) Rotorcraft modified in accordance with this STC must be operated in accordance with an FAA approved copy of the Rotorcraft Flight Manual Supplement revised August 2, 1990, or later FAA approved revision. A copy of this Certificate, Continuation Sheet No.

SH770NW, the maintenance manual and FAA approved Rotorcraft Flight Manual Supplement must be maintained as part of the permanent records of the modified helicopter.

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