2011-14397. Airworthiness Directives; Bombardier, Inc. Model CL-215-1A10, CL-215-6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant) Airplanes

AGENCY:

Federal Aviation Administration (FAA), DOT.

ACTION:

Notice of proposed rulemaking (NPRM).

SUMMARY:

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

The emergency water dump pulley support bracket assembly, Part Number (P/N) 215-94711-2, has been found cracked or broken on a number of aeroplanes. Failure of the emergency water dump pulley support bracket assembly in combination with other system failures such as an engine failure during take off or pitch control system jam, may result in a loss of control of the aeroplane.

* * * * *

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

DATES:

We must receive comments on this proposed AD by July 25, 2011.

ADDRESSES:

You may send comments by any of the following methods:

• Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
• Fax: [phone].
• Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590.
• Hand Delivery: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-40, 1200 New Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.

For service information identified in this proposed AD, contact Bombardier, Inc., 400 Côte-Vertu Road West, Dorval, Québec H4S 1Y9, Canada; telephone [phone]; fax [phone]; e-mail [e-mail]; Internet http://www.bombardier.com. You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425-227-1221.

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 proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Operations office (telephone [phone]) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT:

Andy Rambalakos, Aerospace Engineer, Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone [phone]; fax [phone].

SUPPLEMENTARY INFORMATION:

Comments Invited

We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include “Docket No. FAA-2011-0565; Directorate Identifier 2010-NM-280-AD” at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD based on those comments.

We will post all comments we receive, without change, to http://www.regulations.gov,, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD.

Discussion

Transport Canada Civil Aviation, which is the aviation authority for Canada, has issued Canadian Airworthiness Directive CF-2010-38R2, dated March 17, 2011 (referred to after this as “the MCAI”), to correct an unsafe condition for the specified products. The MCAI states:

The emergency water dump pulley support bracket assembly, Part Number (P/N) 215-94711-2, has been found cracked or broken on a number of aeroplanes. Failure of the emergency water dump pulley support bracket assembly in combination with other system failures such as an engine failure during take off or pitch control system jam, may result in a loss of control of the aeroplane.

Revision 2 of this AD is issued to ensure that terminating action for this AD is carried out prior to the 2011 fire season.

The required actions include a general visual inspection to determine if either universal solid (round head) rivets or flush rivets of the bracket assembly of the emergency water dump pulley are installed; replacing the solid rivets with flush rivets and installing new stiffeners on the bracket assembly of the emergency water dump pulley, if necessary; a detailed inspection and a liquid penetrant inspection of the stiffeners for cracks, deformations, or signs of corrosion, and replacing the stiffeners with new stiffeners if necessary; and re-installing the bracket assembly of the emergency water dump pulley using radius packers. You may obtain further information by examining the MCAI in the AD docket.

Relevant Service Information

Bombardier, Inc. has issued Service Bulletin 215-A543, Revision 1, dated June 23, 2010; and Service Bulletin 215-A4424, Revision 2, dated June 23, 2010. The actions described in this service information are intended to correct the unsafe condition identified in the MCAI.

FAA's Determination and Requirements of This Proposed AD

This product has been approved by the aviation authority of another country, and is approved for operation in the United States. Pursuant to our bilateral agreement with the State of Design Authority, we have been notified of the unsafe condition described in the MCAI and service information referenced above. We are proposing this AD because we evaluated all pertinent information and determined an unsafe condition exists and is likely to exist or develop on other products of the same type design.

Differences Between This AD and the MCAI or Service Information

We have reviewed the MCAI and related service information and, in general, agree with their substance. But we might have found it necessary to use different words from those in the MCAI to ensure the AD is clear for U.S. operators and is enforceable. In making these changes, we do not intend to differ substantively from the information provided in the MCAI and related service information.

We might also have proposed different actions in this AD from those in the MCAI in order to follow FAA policies. Any such differences are highlighted in a Note within the proposed AD.

Costs of Compliance

Based on the service information, we estimate that this proposed AD would affect about 6 products of U.S. registry. We also estimate that it would take about 40 work-hours per product to comply with the basic requirements of this proposed AD. The average labor rate is $85 per work-hour. Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $20,400, or $3,400 per product.

We have received no definitive data that would enable us to provide a cost estimate for the on-condition actions specified in this AD.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. “Subtitle VII: Aviation Programs,” describes in more detail the scope of the Agency's authority.

We are issuing this rulemaking under the authority described in “Subtitle VII, Part A, Subpart III, Section 44701: General requirements.” Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.

Regulatory Findings

We determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would 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.

For the reasons discussed above, I certify this proposed regulation:

1. Is not a “significant regulatory action” under Executive Order 12866;

2. Is not a “significant rule” under the 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.

We prepared a regulatory evaluation of the estimated costs to comply with this proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

• Air transportation
• Aircraft
• Aviation safety
• Incorporation by reference
• Safety

The Proposed Amendment

Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39—AIRWORTHINESS DIRECTIVES

1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

§ 39.13

[Amended]

2. The FAA amends § 39.13 by adding the following new AD:

Bombardier, Inc.: Docket No. FAA-2011-0565; Directorate Identifier 2010-NM-280-AD.

Comments Due Date

(a) We must receive comments by July 25, 2011.

Affected ADs

(b) None.

Applicability

(c) This AD applies to Bombardier, Inc. Model CL-215-1A10 airplanes, serial numbers 1051 through 1125 inclusive; Model CL-215-6B11 (CL-215T Variant) airplanes, serial numbers 1056 through 1125 inclusive; and Model CL-215-6B11 (CL-415 Variant) airplanes, serial numbers 2001 through 2085 inclusive; certificated in any category.

Subject

(d) Air Transport Association (ATA) of America Code 25: Equipment/Furnishings.

Reason

(e) The mandatory continuing airworthiness information (MCAI) states:

The emergency water dump pulley support bracket assembly, Part Number (P/N) 215-94711-2, has been found cracked or broken on a number of aeroplanes. Failure of the emergency water dump pulley support bracket assembly in combination with other system failures such as an engine failure during take off or pitch control system jam, may result in a loss of control of the aeroplane.

* * * * *

Compliance

(f) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.

Inspections and Corrective Actions

(g) Within 50 flight cycles or 30 days after the effective date of this AD, whichever occurs first, do a general visual inspection to determine if either universal solid (round head) rivets or flush rivets of the bracket assembly of the emergency water dump pulley are installed, in accordance with the Accomplishment Instruction of Bombardier Service Bulletin 215-A543, Revision 1, dated June 23, 2010 (for Model CL-215-1A10 and CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Service Bulletin 215-A4424, Revision 2, dated June 23, 2010 (for Model CL-215-6B11 (CL-415 Variant) airplanes).

(h) If, during the inspection required by paragraph (g) of this AD, universal solid rivets are determined to be installed: Within 50 flight cycles or 30 days after the effective date of this AD, whichever occurs first, replace the solid rivets with flush rivets, and install new stiffeners on the bracket assembly of the emergency water dump pulley, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 215-A543, Revision 1, dated June 23, 2010 (for Model CL-215-1A10 and CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Service Bulletin 215-A4424, Revision 2, dated June 23, 2010 (for Model CL-215-6B11 (CL-415 Variant) airplanes).

(i) If, during the inspection required by paragraph (g) of this AD, flush rivets are determined to be installed; and for airplanes on which flush rivets are installed in accordance with paragraph (h) of this AD: Within 100 flight cycles or 60 days after the effective date of this AD, whichever occurs first, do a detailed inspection of the stiffeners for cracks, deformation, and signs of corrosion, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 215-A543, Revision 1, dated June 23, 2010 (for Model CL-215-1A10 and CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Service Bulletin 215-A4424, Revision 2, dated June 23, 2010 (for Model CL-215-6B11 (CL-415 Variant) airplanes). Thereafter, at intervals not to exceed 100 flight cycles, repeat the detailed inspections of the stiffeners. If any crack, deformation, or signs of corrosion are found, before further flight, replace the stiffeners with new stiffeners, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 215-A543, Revision 1, dated June 23, 2010 (for Model CL-215-1A10 and CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Service Bulletin 215-A4424, Revision 2, dated June 23, 2010 (for Model CL-215-6B11 (CL-415 Variant) airplanes).

(j) Within 100 flight cycles or 60 days after the effective date of this AD, whichever occurs first, do the actions specified in paragraphs (j)(1) and (j)(2) of this AD. Installation of the radius packers terminates the repetitive detailed inspections of the support bracket assembly of the emergency water dump pulley required by paragraph (i) of this AD.

(1) Do a liquid penetrant inspection of the stiffeners having P/N 215-94711-6 and P/N 215-94711-8 for cracks, deformation, or signs of corrosion, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 215-A543, Revision 1, dated June 23, 2010 (for Model CL-215-1A10 and CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Service Bulletin 215-A4424, Revision 2, dated June 23, 2010 (for Model CL-215-6B11 (CL-415 Variant) airplanes). If any crack, deformation, or sign of corrosion is found, before further flight, replace damaged stiffeners with new stiffeners, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 215-A543, Revision 1, dated June 23, 2010 (for Model CL-215-1A10 and CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Service Bulletin 215-A4424, Revision 2, dated June 23, 2010 (for Model CL-215-6B11 (CL-415 Variant) airplanes).

(2) Re-install the bracket assembly of the emergency water dump pulley using radius packers, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 215-A543, Revision 1, dated June 23, 2010 (for Model CL-215-1A10 and CL-215-6B11 (CL-215T Variant) airplanes); or Bombardier Service Bulletin 215-A4424, Revision 2, dated June 23, 2010 (for Model CL-215-6B11 (CL-415 Variant) airplanes).

Credit for Actions Accomplished in Accordance With Previous Service Information

(k) Actions accomplished before the effective date of this AD according to the service bulletins specified in Table 1 of this AD, are considered acceptable for compliance with the corresponding actions specified in this AD.

Table 1—Service Bulletins for Credit

Bombardier service bulletin—	Revision—	Dated—
215-4424	Original	January 25, 2010.
215-A4424	1	May 18, 2010.
215-A543	Original	May 19, 2010.

FAA AD Differences

Note 1:

This AD differs from the MCAI and/or service information as follows:

(1) Although Canadian Airworthiness Directive CF-2010-38R2, dated March 17, 2011, has a compliance time of “No later than 01 June 2011,” for Part II—Terminating Action, this AD has a compliance time of “Within 100 flight cycles or 60 days after the effective date of this AD, whichever occurs first.” We have coordinated this difference with Transport Canada Civil Aviation (TCCA).

(2) Although Canadian Airworthiness Directive CF-2010-38R2, dated March 17, 2011, has an initial compliance time of “within 50 flight cycles after the effective date of this AD” for identifying the type of rivet installed, this AD has a compliance time of “within 50 flight cycles or 30 days after the effective date of this AD, whichever occurs first.” In addition, the follow-on inspections in paragraph (i) of this AD for airplanes on which flush rivets are determined to be installed, is “within 100 flight cycles or 60 days after the effective date of this AD, whichever occurs first.” We have coordinated this difference with TCCA.

Other FAA AD Provisions

(l) The following provisions also apply to this AD:

(1) Alternative Methods of Compliance (AMOCs): The Manager, New York Aircraft Certification Office, ANE-170, 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 ACO, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone [phone]; fax [phone]. 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. The AMOC approval letter must specifically reference this AD.

(2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required to assure the product is airworthy before it is returned to service.

Related Information

(m) Refer to MCAI Canadian Airworthiness Directive CF-2010-38R2, dated March 17, 2011; Bombardier Service Bulletin 215-A543, Revision 1, dated June 23, 2010; and Bombardier Service Bulletin 215-A4424, Revision 2, dated June 23, 2010; for related information.

Issued in Renton, Washington, on June 2, 2011.

Kalene C. Yanamura,

Acting Manager, Transport Airplane Directorate, Aircraft Certification Service.