2021-26-01: Tail Rotor Control System
FAA order 2021-26-01 is an airworthiness directive in force since December 28, 2021. The FAA's subject line: Tail Rotor Control System. It names Bell 505: about 196 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: rotorcraft systems.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Bell Textron Canada Limited
- Models
- 505
- On this site
- Bell 505 196 registered
Dates and paperwork
- In force since
- December 28, 2021
- Published
- December 13, 2021 (signed December 6, 2021)
- Docket
- FAA-2021-1066
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The FAA's summary their words, unchanged
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 505 helicopters. This AD was prompted by a report of chafing of the right forward tail rotor (T/R) control cable. This AD requires inspecting the right forward T/R cable and, depending on the results, removing the cable assembly from service. This AD also requires measuring the clearance between the right forward T/R control cable and the roller bracket cut out and, depending on the results, adjusting the height of the roller bracket assembly position. The FAA is issuing this AD to address the unsafe condition on these products.
The order itself the regulatory text, as published
Show the full text (4,812 characters)
1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2021-26-01 Bell Textron Canada Limited: Amendment 39-21859; Docket No. FAA-2021-1066; Project Identifier AD-2021-01189-R. (a) Effective Date This airworthiness directive (AD) is effective December 28, 2021. (b) Affected ADs None. (c) Applicability This AD applies to Bell Textron Canada Limited Model 505 helicopters, serial numbers 65011 through 65234 inclusive, 65236 through 65348 inclusive, 65350, and 65352 through 65359 inclusive, with an S-TEC Corporation HeliSAS stability augmentation system and autopilot installed under Supplemental Type Certificate SR09758DS. (d) Subject Joint Aircraft System Component (JASC) Code 6720, Tail Rotor Control System. (e) Unsafe Condition This AD was prompted by a report of chafing of the right forward tail rotor (T/R) control cable caused by contact with an autopilot yaw servo bracket. The FAA is issuing this AD to detect and prevent chafing of the T/R control cable. The unsafe condition, if not addressed, could result in failure of the right forward T/R control cable, loss of T/R control, and subsequent loss of control of the helicopter. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions Within 25 hours time-in-service or 30 days, whichever occurs first after the effective date of this AD, accomplish the following: (1) Using a flashlight, visually inspect the right forward T/R control cable assembly part number M207-20M489-041 in the area of the roller bracket assembly for signs of chafing. Move the T/R pedals through the full range of motion and inspect the T/R control cable for chafing. If there is any chafing, before further flight, remove cable assembly part number M207-20M489-041 from service. (2) Measure the clearance between the right forward T/R control cable and the roller bracket cut out as shown in Figure 1 of Bell Alert Service Bulletin 505-21-27, dated October 7, 2021. If the clearance is less than 0.3? (7.6 mm), before further flight, adjust the height of the roller bracket assembly position until the clearance is a minimum of 0.3? (7.6 mm). (h) Alternative Methods of Compliance (AMOCs) (1) The Manager, DSCO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (i) of this AD. Information may be emailed to: [email protected]. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. (i) Related Information For more information about this AD, contact Hye Yoon Jang, Aerospace Engineer, Delegation Oversight Section, DSCO Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222-5190; email [email protected]. (j) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Bell Alert Service Bulletin 505-21-27, dated October 7, 2021. (ii) [Reserved] (3) For Bell service information identified in this AD, contact Bell Textron Canada Limited, 12,800 Rue de l'Avenir, Mirabel, Quebec J7J 1R4, Canada; telephone 1-450-437-2862 or 1-800-363-8023; fax 1-450-433-0272; email [email protected]; or at https://www.bellflight.com/support/contact-support. (4) You may view this service information at FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N-321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222-5110. (5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email: [email protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html. Issued on December 6, 2021. Ross Landes, Deputy Director for Regulatory Operations, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021-27008 Filed 12-9-21; 4:15 pm]BILLING CODE 4910-13-P
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/2021-26-01.json · aircraft systems.