2002-22-11: Injection wheel

2002-22-11 Turbomeca: Amendment 39-12937. Docket No. 99-NE-33-AD. Supersedes AD 2000-06-12, Amendment 39-11653. Applicability: This airworthiness directive (AD) is applicable to Turbomeca Artouste III B, B1, and D series turboshaft engines with injection wheels part numbers (P/N's) 218.25.700.0, 218.25.704.0, 243.25.709.0, 243.25.713.0, 0.218.27.705.0, 0.218.27.709.0, and 0.218.27.713.0. These engines are installed on, but not limited to Eurocopter SA 315 LAMA and SA 316 Alouette III helicopters. Note 1: This AD applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Compliance with this AD is required as indicated, unless already done. To prevent injection wheel cracks and excessive central labyrinth wear, which could result in an in-flight shutdown (IFSD), do the following: Smoke Check (a) Do the following in accordance with Turbomeca Artouste III Alert Service Bulletin (ASB) No. A218 72 0099, Update 1, dated June 6, 2001: (1) After the last flight of every day, check for smoke emission through the exhaust pipe, air intake, or turbine casing drain during rundown. (2) If smoke is detected, inspect for fuel flow in accordance with paragraph 2.B.(1) and 2.B.(2) of the ASB. (i) If fuel flow is not detected, remove the engine from service and replace with a serviceableengine before further flight. (ii) If fuel flow is detected, remove the electric fuel cock from service and replace with a serviceable part in accordance with section 2.B.(4) and 2.B.(5) of the referenced ASB. (iii) Before entry into service, perform an engine ground run and check the fuel system again for smoke emission through the exhaust pipe, air intake, or turbine casing drain during engine rundown and after shutdown. If smoke emission still remains after replacement of the electric fuel cock, before further flight, remove the engine from service and replace with a serviceable engine. Central Labyrinth Inspection (b) If the central labyrinth has not been inspected or replaced since engine accumulation of 1,500 flight hours (FH) or more time- since-new (TSN) or time-since-last-overhaul (TSO), perform the checks and inspections, and, if necessary, replace the central labyrinth, in accordance with paragraph 2 of the Instructions of Turbomeca Artouste III ASB No. A218 72 0100, Update 1, dated March 13, 2001 and the following Table 1: Table 1.--Inspection Schedule For engine hours TSN, or TSO that are: And cycles/FH ratio is: Then inspect central labyrinth: (1) More than 1,500 but fewer than 2,000. (i) Above 2 cycles. (ii) Below or equal to 2 cycles. Within 250 FH time- in-service (TIS) after the effective date of this AD. Within 500 FH TIS after the effective date of this AD. (2) 2,000 or more Not applicable Within 50 FH TIS or 6 months after the effective date of this AD, whichever occurs first. (c) For the purpose of this AD, a serviceable engine is defined as an engine that does not exhibit smoke emission. Alternative Methods of Compliance (d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Engine Certification Office (ECO). Operators must submit their request through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, ECO. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the ECO. Special Flight Permits (e) Special flight permits may be issued in accordance with 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the helicopter to a location where the requirements of this AD can be done. Documents That Have Been Incorporated by Reference (f) The checks, inspections, and replacements must be done in accordance with the following Turbomeca Artouste III alert service bulletins (ASB's): Document No. Pages Revision Date ASB A218 72 0099. Total pages: 5 All 1 June 6, 2001. ASB A218 72 0100 Total pages: 7 All 1 March 13, 2001. These incorporations by reference were approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Turbomeca, 40220 Tarnos, France; telephone +33 05 59 64 40 00; fax +33 05 59 64 60 80. Copies may be inspected at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Note 3: The subject of this AD is addressed in Direction Generale de L'Aviation Civile airworthiness directive 2001-235(A), dated June 13, 2001. Effective Date (g) This amendment becomes effective on December 13, 2002.