AD 2016-20-04 Airworthiness Directives; Airbus Helicopters

This AD becomes effective October 18, 2016.

(1) The Manager, Safety Management Group, FAA, may approve AMOCs for this AD. Send your proposal to: Matt Fuller, Senior Aviation Safety Engineer, Safety Management Group, Rotorcraft Directorate, FAA, 10101 Hillwood Pkwy, Fort Worth, TX 76177; telephone (817) 222-5110; email 9-ASW-FTW-AMOC-Requests@faa.gov. (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, we suggest that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office, before operating any aircraft complying with this AD through an AMOC.

(1) Aerospatiale (now Airbus Helicopters) Flight Manuals SA 341G, Issue 2, dated December 1974, and SA 342J, Issue 1, dated April 27, 1976, which are not incorporated by reference, contain additional information about the subject of this proposed rule. For service information identified in this proposed rule, contact Airbus Helicopters, 2701 N. Forum Drive, Grand Prairie, TX 75052; telephone (972) 641-0000 or (800) 232-0323; fax (972) 641-3775; or at http://www.airbushelicopters.com/techpub. You may review the referenced service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy, Room 6N-321, Fort Worth, TX 76177. (2) The subject of this AD is addressed in European Aviation Safety Agency (EASA) Emergency AD No. 2016-0073-E, dated April 13, 2016. You may view the EASA AD on the Internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2016-9168.

(1) Before further flight: (i) Amend the rotorcraft flight manual (RFM) by inserting a copy of this AD or by making pen-and-ink changes in Section 1, Limitations, by adding the following: AUTOROTATION TRAINING FLIGHTS ARE PROHIBITED. (ii) Install a placard on the instrument panel in full view of the pilots that states the following: AUTOROTATION TRAINING FLIGHTS ARE PROHIBITED. (2) Within 25 hours time-in-service: (i) Inspect the crosstube to determine whether the metal is coated. Make a copper sulfate solution by following the Accomplishment Instructions, paragraph 3.B.2.b.1., of Airbus Helicopters Alert Service Bulletin (ASB) No. SA341/342-32.08, Revision 0, dated March 24, 2016 (ASB 32.08). Apply 2 to 3 drops of the solution to Area Z in Figure 1 of ASB 32.08 and wait 10 to 15 seconds. If a dark mark appears as shown in Area 2 of Figure 3 of ASB 32.08, there is no metal coating. If a light mark appears as shown in Area 4 of Figure 3 of ASB 32.08, remove all metal coating in Area Z of Figure 1 of ASB 32.08. (ii) Inspect the hardness of the crosstube by using the criteria in the table under Paragraph 3.B.2.c. of ASB 32.08. If the hardness is not within the value range in the table, before further flight, replace the crosstube. If the hardness is within the value range in the table, apply corrosion protectant to Area Z in Figure 1 of ASB 32.08. (iii) Remove the RFM limitation and the instrument panel placard required by paragraphs (e)(1)(i) and (e)(1)(ii) of this AD.

This AD defines the unsafe condition as incorrect hardness of the crosstube, which could result in failure of the crosstube and subsequent dropping or tipping of the helicopter.