Document ID: chunk:federal_register_of_legislation:F2019L01073:body:0:p2
Version: federal_register_of_legislation:F2019L01073
Segment Type: other
Provision Reference: 
Character Range: 2776–5102

due to corrosion, inspect the positioning rod assembly and side brace rod end for corrosion in accordance with Section 2 of SB 76A-32-03 Revision 1, as in force on 15 September 2000.
                     b. Replace any applicable part that is corroded with a serviceable part.
                Note 1:  Federal Aviation Administration of USA AD 2001-01-04 Amendment 39-12074 refers.
                     Note 2:  The words "as in force from time to time" require compliance with the most recent version of the referenced document.
Compliance:          1. a. Unless previously accomplished, within 14 days after the commencement of this AD.
                     b. Before further flight.
                     2. a. Unless previously accomplished, within 42 days after the commencement of this AD.
                     b. Before further flight.
                     3. a. At intervals not to exceed 90 days.
                     b. Before further flight.
                     4. a. At intervals not to exceed 12 months or 1,500 hours' time in service, whichever occurs first.
                     b. Before further flight.
                This AD commences on 23 August 2019.
Background:     The FAA received a report of a landing gear collapse cause by corrosion due to dissimilar metals in the landing gear rod end.  The actions specified by this Directive are intended to detect corrosion of the threaded joint in the rod assembly to prevent a collapse of the landing gear, and subsequent loss of control of the helicopter during landing.
                Amendment 1 of this AD is issued to expand the applicability of the AD by removing the aircraft serial number range, thereby making the AD applicable to all S‑76 helicopters that have the applicable part numbers for positioning rod assembly or side brace rod ends installed.
                This amendment action is considered necessary to address the possibility that the affected parts can be installed on all S-76 helicopters, including those models of later serial numbers.  This possibility is confirmed by the effectivity of BFGoodrich Service Bulletin 76A-32-03, Revision 1, dated 15 September 2000 which includes all S-76A, S-76B and S-76C helicopters fitted with the affected parts.

Pieter van Dijk
Delegate of the Civil Aviation Safety Authority
13 August 2019