# AD 2011-12-10: Main rotor blade - Type: Airworthiness directive - Status: Historical - Products: Robinson Helicopter R22, R22 ALPHA, R22 BETA, R22 MARINER, R44 and R44 II - Effective: July 5, 2011 - Published: June 17, 2011, 76 FR 35330–35334 - Issued: June 2, 2011 - Issued as: Final rule; request for comments - Supersedes: [AD 2007-26-12](https://openairdocs.org/ad/2007-26-12) - Superseded by: [AD 2014-23-16](https://openairdocs.org/ad/2014-23-16) - Product type: Aircraft, Rotorcraft - Amendment: 39-16717 - Docket: FAA-2011-0588 (https://www.regulations.gov/docket/FAA-2011-0588) - Project: 2010-SW-074-AD - Registered aircraft: 2,755 may be affected, by airframe or engine model (OpenAirDocs) - Official PDF: https://openairdocs.org/files/sha256/f6/06/f606675473210766ceb952c536a1401869b07116b24a4100e3e989fe2ad89d6f (from https://www.govinfo.gov/content/pkg/FR-2011-06-17/pdf/2011-14246.pdf) - Federal Register: https://www.federalregister.gov/documents/2011/06/17/2011-14246/airworthiness-directives-robinson-helicopter-company-model-robinson-r22-r22-alpha-r22-beta-r22 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7950DFF2185691FA862578B2004D6912.0001 - DRS record last changed: August 7, 2025 - Page: https://openairdocs.org/ad/2011-12-10 ## Summary The FAA is correcting an airworthiness directive (AD) that was published in the Federal Register. That AD applies to Robinson Helicopter Company (Robinson) Model R22, R22 Alpha, R22 Beta, R22 Mariner, R44, and R44 II helicopters. The paragraph reference in paragraph (b) of the Compliance section is incorrect. Paragraph (b) references paragraph (d), when it should reference paragraph (c). This document corrects that error. Additionally, the word “inspection” has been added in paragraph (b) for clarification. In all other respects, the original document remains the same. ## The airworthiness directive In the Federal Register of June 17, 2011, on page 35333 in the second column, paragraph (b) of AD 2011-12-10 is corrected to read as follows: (b) If you find any bare metal in the area of the skin-to-spar bond line, before further flight, inspect the blade by following the inspection requirements of paragraph (c) of this AD. ## Rule preamble ### Dates The effective date of this final rule is March 5, 2012. The effective date for AD 2011-12-10 remains July 5, 2011. Examining the AD Docket: You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations Office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, any incorporated-by-reference service information, the economic evaluation, any comments received, and other information. The street address for the Docket Operations Office (phone: 800-647-5527) is U.S. Department of Transportation, Docket Operations Office, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590. ### For further information contact Eric D. Schrieber, Aerospace Engineer, Los Angeles Aircraft Certification Office, Transport Airplane Directorate, FAA, 3960 Paramount Blvd., Lakewood, CA 90712; telephone (562) 627-5348; email eric.schrieber@faa.gov (regarding Model R22 helicopters); or Fred Guerin, Aerospace Engineer, Los Angeles Aircraft Certification Office, Transport Airplane Directorate, FAA, 3960 Paramount Blvd., Lakewood, CA 90712; telephone (562) 627-5232; email fred.guerin@faa.gov (regarding Model R44 helicopters). ### SUPPLEMENTARY INFORMATION Airworthiness Directive 2011-12-10, Amendment 39-16717 (76 FR 35330, June 17, 2011), currently includes the following paragraph (b) in the compliance section: “(b) If you find any bare metal in the area of the skin-to-spar bond line, before further flight, inspect the blade by following the requirements of paragraph (d) of this AD.” As published, the reference to paragraph (d) is incorrect. The correct reference is to paragraph (c). Paragraph (c) contains the inspection requirements, and the incorrect reference to paragraph (d) is confusing. We have also added the word “inspection” to clarify that the requirements we are referring to are the inspection requirements, not the compliance times. No other part of the preamble or regulatory information has been changed; therefore, only the changed portion of the final rule is being published in the Federal Register. ## Affected data sheets (2) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS H10WE](https://openairdocs.org/tcds/H10WE): Robinson Helicopter Company; names 4 of 4 models: R22, R22 MARINER, R22 ALPHA, R22 BETA - [TCDS H11NM](https://openairdocs.org/tcds/H11NM): Robinson Helicopter Company; names 2 of 2 models: R44 II, R44 ## 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: 2,755 (2,755 by airframe model, 0 by engine model) - Makers: Robinson Helicopter 2,755 Models with the most aircraft: - [Robinson Helicopter R44 II](https://openairdocs.org/model/robinson-helicopter-r44-ii): 1,381 aircraft (airframe model) - [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta): 634 aircraft (airframe model) - [Robinson Helicopter R44](https://openairdocs.org/model/robinson-helicopter-r44): 551 aircraft (airframe model) - [Robinson Helicopter R22](https://openairdocs.org/model/robinson-helicopter-r22): 131 aircraft (airframe model) - [Robinson Helicopter R22 MARINER](https://openairdocs.org/model/robinson-helicopter-r22-mariner): 34 aircraft (airframe model) - [Robinson Helicopter R22 ALPHA](https://openairdocs.org/model/robinson-helicopter-r22-alpha): 16 aircraft (airframe model) - [Robinson Helicopter R44 ASTRO](https://openairdocs.org/model/robinson-helicopter-r44-astro): 6 aircraft (airframe model) - [Robinson Helicopter R22 BETA II](https://openairdocs.org/model/robinson-helicopter-r22-beta-ii): 2 aircraft (airframe model) All 10 models: https://openairdocs.org/ad/2011-12-10/models.md Every aircraft: https://openairdocs.org/ad/2011-12-10/aircraft.md ## Related documents - [AD 2007-26-12](https://openairdocs.org/ad/2007-26-12) (historical): Blade skin debond · Robinson Helicopter R22, R22 ALPHA, R22 BETA and 3 more. Effective Jan 18, 2008. Replaced by this AD - [AD 2014-23-16](https://openairdocs.org/ad/2014-23-16): Main Rotor Blades · Robinson Helicopter R22, R22 ALPHA, R22 BETA and 3 more. Effective Jan 9, 2015. Supersedes this AD No proposed rule in this release led to it. 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.