| AD Number | 76-03-02 | Status | Active |
| Effective Date | February 17, 1976 | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | 39-2507 |
| Product Type | ["Aircraft"] | Product Subtype | ["Rotorcraft"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Sikorsky Aircraft Corporation |
| Model(s) | S-61L S-61N S-61NM S-61R |
76-03-02 SIKORSKY AIRCRAFT: Amendment 39-2507. Applies to S-61L, S-61N, S- 61NM, and S-61R helicopters certified in all categories including Military CH-3C, HH-3C, CH- 3E, and HH-3E helicopters using NAS 577-10 or NAS 577-10A barrel nuts for attaching the transmission main gearbox to the fuselage structure.
Compliance required as indicated.
To prevent fractures in the attaching nuts accomplish the following:
Remove the NAS 577-10 or NAS 577-10A barrel nuts and replace with RMLH 2577-108 barrel nuts within the next 30 days after the effective date of this AD, unless already accomplished. (NOTE: Sikorsky Service Bulletin No. 61B35-36B covers this subject.)
This supersedes Amendment 39-2202 (40 FR 24355), AD 75-12-13.
This amendment becomes effective February 17, 1976.