### 11421 Federal Register / Vol. 77, No. 38 / Monday, February 27, 2012 / Proposed Rules

that could jeopardize flight safety. We are issuing this AD to eliminate this hazard and ensure that all lavatories have a supplemental oxygen supply.
(f) Compliance

Comply with this AD within the compliance times specified, unless already done.
(g) Restatement of Requirements of AD 2011– 04–09, Amendment 39–16630 (76 FR 12556, March 8, 2011): Oxygen Generator Deactivation

Within 21 days after March 14, 2011 (the effective date of AD 2011–04–09, Amendment 39–16630 (76 FR 12556, March 8, 2011)), do the actions specified in paragraphs (g)(1) and (g)(2) of this AD.

(1) Activate all chemical oxygen generators in the lavatories until the generator oxygen supply is expended. An operator may also remove the oxygen generator(s), in accordance with existing maintenance practice, in lieu of activating it.

(2) For each chemical oxygen generator, after the generator is expended (or removed), remove or re-stow the oxygen masks and close the mask dispenser door.

Note 1 to paragraph (g) of this AD: Chemical oxygen generators are considered a hazardous material and subject to specific requirements under Title 49 CFR for shipping. Oxygen generators must be expended prior to disposal but are considered a hazardous waste; therefore, disposal must be in accordance with all Federal, State, and local regulations. Expended oxygen generators are forbidden in air transportation as cargo. For more information, contact 1–800–HMR–4922.

Note 2 to paragraph (g) of this AD: Design approval holders are not expected to release service instructions for the action specified in paragraph (g) of this AD.
(h) Restatement of Requirements of AD 2011–04–09, Amendment 39–16630 (76 FR 12556, March 8, 2011): Compliance With Federal Aviation Regulations

Notwithstanding the requirements of Sections 25.1447, 121.329, 121.333, and 129.13 of the Federal Aviation Regulations (14 CFR 25.1447, 121.329, 121.333, and 129.13), operators complying with this AD are authorized to operate affected airplanes until accomplishment of the actions specified in paragraph (k) of this AD.
(i) Restatement of Requirements of AD 2011– 04–09, Amendment 39–16630 (76 FR 12556, March 8, 2011): Parts Installation

After March 14, 2011, and until accomplishment of the actions specified in paragraph (k) of this AD, no person may install a chemical oxygen generator in any lavatory on any affected airplane.
(j) Restatement of Requirements of AD 2011– 04–09, Amendment 39–16630 (76 FR 12556, March 8, 2011): Special Flight Permit

Special flight permits, as described in Section 21.197 and Section 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199), are not allowed for the accomplishment of the actions specified in paragraph (g) of this AD. (k) New Requirements of This AD: Oxygen System Restoration

Within 24 months after the effective date of this AD, install a supplemental oxygen system that meets the requirements of Sections 25.1447, 121.329, 121.333, and 129.13 of the Federal Aviation Regulations (14 CFR 25.1447, 121.329, 121.333, and 129.13) in each lavatory, as specified in paragraph (k)(1) or (k)(2) of this AD, as applicable.

(1) If compliance with paragraph (k) of this AD is achieved using a chemical oxygen generator, the actions specified in paragraph (k) of this AD must be done in accordance with a method approved by the Manager of the responsible FAA oversight office having responsibility over the modification. For a method to be approved, it must meet the certification basis of the airplane, and the approval must specifically refer to this AD.

(2) If compliance with paragraph (k) of this AD is achieved without a chemical oxygen generator, the specifications of paragraphs (k)(2)(i) and (k)(2)(ii) of this AD apply.

(i) The modification must receive FAA approval in accordance with 14 CFR part 21 as a major design change. Notwithstanding operations specification restrictions to the contrary, organizational approval holders may exercise their full authority in approving installations that meet the installation requirements of this AD.

(ii) Deviation from approved service instructions and subsequent modifications may be handled by normal operator procedures without requiring approval of an alternative method of compliance.
(l) Alternative Methods of Compliance (AMOCs)

(1) The Manager, Transport Standards Staff, ANM–110, 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 Transport Standards Staff, send it to the attention of the person identified in the Related Information section of this AD.

(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.

(m) Related Information

For more information about this AD, contact Jeff Gardlin, Aerospace Engineer, Airframe and Cabin Safety Branch, ANM– 115, FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington 98057–3356; phone: 425–227–2136; fax: 425– 227–1149; email: jeff.gardlin@faa.gov.

Issued in Renton, Washington, on January 27, 2012. Ali Bahrami, Manager,Transport Airplane Directorate, Aircraft Certification Service.

[FR Doc. 2012–4031 Filed 2–24–12; 8:45 am]

**BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION** 

**Federal Aviation Administration**

**14 CFR Part 39**

**[Docket No. FAA–2012–0071; Directorate Identifier 2012–NE–05–AD]** 

**RIN 2120–AA64**

**Airworthiness Directives; Pratt & Whitney Canada, Auxiliary Power Units** 

**AGENCY :**  Federal Aviation Administration (FAA), DOT.

**ACTION :**  Notice of proposed rulemaking (NPRM).

**SUMMARY :**  We propose to adopt a new airworthiness directive (AD) for certain serial numbers of Pratt & Whitney Canada (P&WC) PW901A auxiliary power units (APUs) approved under Technical Standard Order TSO–C77A and installed on, but not limited to, Boeing 747–400 series airplanes. This proposed AD was prompted by several events of high-pressure turbine blade fracture leading to separation of the rear gas generator case and release of high energy debris. This proposed AD would require modifications of the rear gas generator case, exhaust duct support, and turbine exhaust duct flanges. We are proposing this AD to prevent separation of the rear gas generator case and release of high energy debris, which could result in injury and damage to the airplane.

**DATES :**  We must receive comments on this proposed AD by April 27, 2012.

**ADDRESSES :**  You may send comments by any of the following methods:

• Federal eRulemaking Portal: Go to http://www.regulations.gov and follow the instructions for sending your comments electronically.

• Mail: Docket Management Facility, U.S. Department of Transportation, 1200 New Jersey Avenue SE., West Building Ground Floor, Room W12–140, Washington, DC 20590–0001.

• Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.

• Fax: 202–493–2251. For service information identified in this proposed AD, contact Pratt &Whitney Canada Corp., 1000 MarieVictorin, Longueuil, Quebec, Canada J4G 1A1; phone: 450–677–9411. You may review copies of the referenced service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125.


### 11422 Federal Register / Vol. 77, No. 38 / Monday, February 27, 2012 / Proposed Rules

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 (phone: 800–647–5527) is the same as the Mail address provided in the **ADDRESSES** section. Comments will be available in the AD docket shortly after receipt.

**FOR FURTHER INFORMATION CONTACT :**  Mazdak Hobbi, Aerospace Engineer, New York Aircraft Certification Office, FAA, Engine & Propeller Directorate, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516–228– 7330; fax: 516–794–5531; email: mazdak.hobbi@faa.gov.

**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–2012–0071; Directorate Identifier 2012–NE–05–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 with FAA personnel concerning this proposed AD. Using the search function of the Web site, anyone can find and read the comments in any of our dockets, including, if provided, the name of the individual who sent the comment (or signed the comment on behalf of an association, business, labor union, etc.). You may review the DOT’s complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477–78).

Discussion

Transport Canada, which is the aviation authority for Canada, has issued Canada AD CF–2011–40, dated October 26, 2011 (referred to after this as ‘‘the MCAI’’), to correct an unsafe condition for the specified products. The MCAI states: The PW901A Auxiliary Power Units have experienced several events of High Pressure Turbine (HPT) blade fracture, some of which have resulted in the separation of the rear gas generator case, exhaust duct support, the turbine exhaust duct flanges and the release of high energy debris. Subsequent investigation revealed the turbine exhaust duct can separate under excessive load conditions resulting from extreme engine distress such as HPT blade fractures. You may obtain further information by examining the MCAI in the AD docket.

Relevant Service Information

P&WC has issued Service Bulletin No. A16255R2, dated March 1, 2011. 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

These APUs have been approved by Canada, and are approved for operation in the United States. Pursuant to our bilateral agreement with Canada, they have notified us of the unsafe condition described in the MCAI and service information referenced above. We are proposing this AD because we evaluated all information provided by Canada, and determined the unsafe condition exists and is likely to exist or develop on other APUs of the same type design. This proposed AD would require modification of the APU rear gas generator case, exhaust duct support, and turbine exhaust duct flanges. Costs of Compliance

Based on the service information, we estimate that this proposed AD would affect about 135 APUs installed on airplanes of U.S. registry. The average labor rate is $85 per work-hour. Required parts would cost about $39,899 per APU. Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $5,386,365. 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 airworthiness directive (AD):
Pratt & Whitney Canada: Docket No. FAA– 2012–0071; Directorate Identifier 2012– NE–05–AD.
(a) Comments Due Date

We must receive comments by April 27,
2012.
(b) Affected ADs

None.


### 11423 Federal Register / Vol. 77, No. 38 / Monday, February 27, 2012 / Proposed Rules

(c) Applicability

This AD applies to Pratt & Whitney Canada (P&WC) PW901A auxiliary power units (APUs) approved under Technical Standard Order TSO–C77A and installed on, but not limited to, Boeing 747–400 series airplanes. The affected APU serial numbers are PCE 900001 through PCE 900776 inclusive.

(d) Reason

This AD was prompted by several events of high-pressure turbine blade fracture leading to separation of the rear gas generator case and release of high energy debris. We are issuing this AD to prevent separation of the rear gas generator case and release of high energy debris, which could result in injury and damage to the airplane.
(e) Actions and Compliance

Unless already done, do the following
actions.

(1) Within 42 months after the effective date of this AD or the first time any maintenance is done other than preventative maintenance, whichever occurs first, modify the rear gas generator case, exhaust duct support, and turbine exhaust duct flanges.

(2) Use paragraphs 3.A. through 3.B(3)(f) of Accomplishment Instructions, and paragraph 4.A. of Appendix, of P&WC Service Bulletin (SB) No. A16255R2, dated March 1, 2011, to do the modifications.

(f) Credit for Previous Action

APUs modified previously using P&WC SB No. A16255R1, dated September 12, 2008, or P&WC SB No. A16255, dated December 12, 2007, meet the modification requirements of this AD.
(g) Alternative Methods of Compliance (AMOCs)

The Manager, New York Aircraft Certification Office, FAA, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request.

(h) Related Information

(1) For more information about this AD, contact Mazdak Hobbi, Aerospace Engineer, New York Aircraft Certification Office, FAA, Engine & Propeller Directorate, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516–228–7330; fax: 516–794–5531; email: mazdak.hobbi@faa.gov.

(2) Refer to Transport Canada AD CF– 2011–40, dated October 26, 2011, and P&WC SB No. A16255R2, dated March 1, 2011, for related information.

(3) For service information identified in this AD, contact Pratt & Whitney Canada Corp., 1000 Marie-Victorin, Longueuil, Quebec, Canada J4G 1A1; phone: 450–677– 9411. You may review copies of the referenced service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125. Issued in Burlington, Massachusetts, on February 17, 2012. Peter A. White, Manager, Engine & Propeller Directorate, Aircraft Certification Service.
[FR Doc. 2012–4448 Filed 2–24–12; 8:45 am]

**BILLING CODE 4910–13–P**

**DEPARTMENT OF HOMELAND SECURITY** 

**Coast Guard**

**33 CFR Part 165**

**[Docket No. USCG–2012–0001]**

**RIN 1625–AA00**

**Safety Zone; Magothy River, Sillery Bay, MD** 

**AGENCY :**  Coast Guard, DHS.

**ACTION :**  Notice of proposed rulemaking.

**SUMMARY :**  The Coast Guard proposes to establish a safety zone in certain waters of the Magothy River, in Sillery Bay, Maryland. This safety zone is necessary to provide for the safety of life, property and the environment. This safety zone restricts the movement of vessels throughout the regulated area during The Bumper Bash, held annually on the fourth Saturday of July.

**DATES :**  Comments and related material must be received by the Coast Guard on or before March 28, 2012. Requests for public meetings must be received by the Coast Guard on or before March 12,
2012.

**ADDRESSES :**  You may submit comments identified by docket number USCG– 2012–0001 using any one of the following methods:

(1) Federal eRulemaking Portal: http://www.regulations.gov.

(2) Fax: 202–493–2251. (3) Mail: Docket Management Facility (M–30), U.S. Department of Transportation, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590–
0001.

(4) Hand delivery: Same as mail address above, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The telephone number is 202–366–9329.

To avoid duplication, please use only one of these four methods. See the ‘‘Public Participation and Request for Comments’’ portion of the

**SUPPLEMENTARY INFORMATION** section below for instructions on submitting
comments.

**FOR FURTHER INFORMATION CONTACT :**  If you have questions on this proposed rule, call or email Mr. Ronald Houck, Sector Baltimore Waterways Management Division, Coast Guard; telephone 410–576–2674, email Ronald.L.Houck@uscg.mil. If you have questions on viewing or submitting material to the docket, call Renee V. Wright, Program Manager, Docket Operations, telephone 202–366–9826.

**SUPPLEMENTARY INFORMATION :**  Public Participation and Request for Comments

We encourage you to participate in this rulemaking by submitting comments and related materials. All comments received will be posted without change to http:// www.regulations.gov and will include any personal information you have provided. Submitting comments

If you submit a comment, please include the docket number for this rulemaking (USCG–2012–0001), indicate the specific section of this document to which each comment applies, and provide a reason for each suggestion or recommendation. You may submit your comments and material online (via http:// www.regulations.gov ) or by fax, mail, or hand delivery, but please use only one of these means. If you submit a comment online via www.regulations.gov, it will be considered received by the Coast Guard when you successfully transmit the comment. If you fax, hand deliver, or mail your comment, it will be considered as having been received by the Coast Guard when it is received at the Docket Management Facility. We recommend that you include your name and a mailing address, an email address, or a telephone number in the body of your document so that we can contact you if we have questions regarding your submission.

To submit your comment online, go to http://www.regulations.gov, click on the ‘‘submit a comment’’ box, which will then become highlighted in blue. In the ‘‘Document Type’’ drop down menu select ‘‘Proposed Rule’’ and insert ‘‘USCG–2012–0001’’ in the ‘‘Keyword’’ box. Click ‘‘Search’’ then click on the balloon shape in the ‘‘Actions’’ column. If you submit your comments by mail or hand delivery, submit them in an unbound format, no larger than 8 1 ⁄ 2 by 11 inches, suitable for copying and electronic filing. If you submit comments by mail and would like to know that they reached the Facility, please enclose a stamped, self-addressed postcard or envelope. We will consider all comments and material received