# AD 2000-26-12: Hydraulic Line Shielding Hose - Type: Airworthiness directive - Status: Current - Products: Airbus Helicopters Deutschland EC135P1 and EC135T1 - Effective: February 6, 2001 - Published: January 2, 2001, 66 FR 1–2 - Issued: December 18, 2000 - Issued as: Final rule - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Rotorcraft - Amendment: 39-12062 - Docket: 2000-SW-23-AD - Registered aircraft: 28 may be affected, by airframe or engine model (OpenAirDocs) - Official PDF: https://openairdocs.org/files/sha256/59/6e/596e9514819633bce102775fe1900c58728d2061837a1f569a043f88134834c5 (from https://www.govinfo.gov/content/pkg/FR-2001-01-02/pdf/00-33334.pdf) - Federal Register: https://www.federalregister.gov/documents/2001/01/02/00-33334/airworthiness-directives-eurocopter-deutschland-gmbh-model-ec135-p1-and-ec135-t1-helicopters - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3A85769CC9C7DBC086256A4600590BDB.0001 - DRS record last changed: November 21, 2025 - Page: https://openairdocs.org/ad/2000-26-12 ## Summary This amendment adopts a new airworthiness directive (AD) for Eurocopter Deutschland GmbH (ECD) Model EC135 P1 and EC135 T1 helicopters that requires inspecting the hydraulic line shielding hose (hose), replacing any unairworthy hose with an airworthy hose, and installing a nylon cable tie. This amendment is prompted by the tail rotor drive shaft Thomas coupling contacting and chafing the hose that shields the fenestron tail rotor hydraulic lines. The actions specified by this AD are intended to prevent damage to the hose, leaking of accumulated hydraulic fluid to an area with an ignition source, inflight fire, and subsequent loss of control of the helicopter. ## The airworthiness directive ### Adoption of the Amendment Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: ## Rule preamble ### Dates Effective February 6, 2001. The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of February 6, 2001. ### Addresses The service information referenced in this AD may be obtained from American Eurocopter Corporation, 2701 Forum Drive, Grand Prairie, Texas 75053-4005, telephone (972) 641-3460, fax (972) 641-3527. This information may be examined at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. ### For further information contact Richard Monschke, Aviation Safety Engineer, FAA, Rotorcraft Directorate, Rotorcraft Standards Staff, Fort Worth, Texas 76193-0110, telephone (817) 222-5116, fax (817) 222-5961. ### SUPPLEMENTARY INFORMATION A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an airworthiness directive (AD) for ECD Model EC135 P1 and EC135 T1 helicopters was published in the Federal Register on September 18, 2000 (65 FR 56273). That action proposed to require, within 50 hours time-in-service (TIS), inspecting the hose for damage. If damage is found, replacing the unairworthy hose with an airworthy hose within 25 hours TIS was proposed. Also proposed was installing a nylon cable tie to increase the clearance between the drive shaft and the hose. Interested persons have been afforded an opportunity to participate in the making of this amendment. No comments were received on the proposal or the FAA's determination of the cost to the public. The FAA has determined that air safety and the public interest require the adoption of the rule as proposed. The FAA estimates that 25 helicopters of U.S. registry will be affected by this AD, that it will take approximately 9.75 work hours per helicopter to accomplish the required actions, and that the average labor rate is $60 per work hour. Based on these figures, the total cost impact of the AD on U.S. operators is estimated to be $14,625 assuming no parts will be required. The regulations adopted herein will not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. Therefore, it is determined that this final rule does not have federalism implications under Executive Order 13132. For the reasons discussed above, I certify that this action (1) is not a “significant regulatory action” under Executive Order 12866; (2) is not a “significant rule” under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. A final evaluation has been prepared for this action and it is contained in the Rules Docket. A copy of it may be obtained from the Rules Docket at the location provided under the caption ADDRESSES. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS H88EU](https://openairdocs.org/tcds/H88EU): Airbus Helicopters Deutschland GmbH (AHD); names 2 of 9 models: EC135P1, EC135T1 ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 28 (28 by airframe model, 0 by engine model) - Makers: Eurocopter Deutschland 28 Models with the most aircraft: - [Eurocopter Deutschland EC135T1](https://openairdocs.org/model/eurocopter-deutschland-ec135t1): 14 aircraft (airframe model) - [Eurocopter Deutschland EC135P1](https://openairdocs.org/model/eurocopter-deutschland-ec135p1): 14 aircraft (airframe model) All 2 models: https://openairdocs.org/ad/2000-26-12/models.md Every aircraft: https://openairdocs.org/ad/2000-26-12/aircraft.md ## Related documents - [Proposed rule 2000-SW-23-AD](https://openairdocs.org/proposed/2000-SW-23-AD): Notice of proposed rulemaking (NPRM), published Sep 18, 2000 Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.