Proposed Rules. Notice of proposed rulemaking (NPRM)
/register/2013/02/25/2013-04220·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Agency: Federal Aviation Administration (FAA), DOT
Action: Notice of proposed rulemaking (NPRM)
Citation: FR Doc. 2013-04220 · RIN 2120-AA64 · Docket No. FAA-2013-0146; Directorate Identifier 2012-SW-060-AD · 14 CFR 39
Summary
We propose to supersede an existing airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model A109E helicopters that requires reducing the tail rotor (T/R) blade life limit, modifying a T/R hub and grip assembly, re-identifying two T/R assemblies, clarifying the never-exceed speed (Vne) limitation and reducing the inspection interval. Since we issued that AD, the manufacturer has redesigned a T/R grip bushing (bushing) that reduces the loads, which caused the T/R cracking, on the T/R blades. This action would require installing the new bushing and re-identifying the T/R hub-and-grip and hub-and-blade assemblies and require a recurring inspection of each bushing. The proposed actions are intended to prevent fatigue failure of a T/R blade and subsequent loss of control of the helicopter.
Dates
We must receive comments on this proposed AD by April 26, 2013.
Connectionstraces to 6
- Content, form, and disposition of maintenance, preventive maintenance, rebuilding, and alteration records (except inspections performed in accordance with part 91, part 125, § 135.411(a)(1), and § 135.419 of this chapter).§ 43.9
- Maintenance records.§ 91.417
- ATC clearance and flight plan required.§ 91.173
- 14 CFR 39
- 14 CFR 119
- 14 CFR 91