2011-23-13: Power turbine governors (PTG)

Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PART 39--AIRWORTHINESS DIRECTIVES 0 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): 2011-23-13 Honeywell International Inc.: Amendment 39-16864; Docket No. FAA-2011-1159; Directorate Identifier 2011-NE-34-AD. (a) Effective Date This AD is effective November 29, 2011. (b) Affected ADs None. (c) Applicability This AD applies to Honeywell International Inc. LTS101-600A-2, - 3, -3A, and LTS101-700D-2 turboshaft engines with a power turbine governor (PTG) model AL-AB1, part number 4-301-289-03, 4-301-289-05, 4-301-289-09, 4-301-101-16, or 4-301-101-18, installed, that is marked with compliance symbol N or P, orwith no compliance symbol, on the PTG identification plate. (d) Unsafe Condition This AD was prompted by reports of two accidents where the engines suddenly lost power and the helicopters had to make emergency autorotation landings, leading to substantial damage to the helicopters. We are issuing this AD to prevent loss of engine power, leading to emergency autorotation landing and damage to the helicopter. (e) Compliance Comply with this AD within the compliance times specified, unless already done. (f) PTGs Marked With Compliance Symbol N, or With No Compliance Symbol (g) For PTGs that are marked with compliance symbol N, or with no compliance symbol, on the PTG identification plate: (1) If the PTG has more than 150 operating hours time-since-new (TSN), time-since-overhaul (TSO), or time-since-replacement (TSR), on the effective date of this AD, replace it with a PTG that is eligible for installation, within the next 50 operating hours. (2) If the PTG has 150 or fewer operating hours TSN, TSO, or TSR, on the effective date of this AD, replace it with a PTG that is eligible for installation, before accumulating 200 total operating hours. (3) Thereafter, replace it with a PTG that is eligible for installation, within every 200 operating hours TSN, TSO, or TSR. (h) PTGs Marked With Compliance Symbol P (i) For PTGs that are marked with compliance symbol P, on the PTG identification plate: (1) Replace it with a PTG that is eligible for installation, before accumulating 900 operating hours. (2) Thereafter, replace it with a PTG that is eligible for installation within every 900 operating hours TSN, TSO, or TSR. (j) Alternative Methods of Compliance (AMOCs) The Manager, Los Angeles Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. (k) Related Information (1) For more information about this AD, contactRobert Baitoo, Aerospace Engineer, Los Angeles Aircraft Certification Office, FAA, 3960 Paramount Blvd., Lakewood, CA 90712; phone: (562) 627-5245; fax: (562) 627-5210; email: [email protected]. (2) Honeywell International Inc. Service Bulletin No. LTS101-73- 20-A0268, dated August 23, 2011, also pertains to this AD. (3) For service information identified in this AD, contact Honeywell International Inc., P.O. Box 52181, Phoenix, AZ 85072- 2181, phone: (800) 601-3099; Web site: http://portal.honeywell.com/wps/portal/aero. (l) Material Incorporated by Reference None.