Browse: Departments   Dates   Agencies  

CFR Citation: 14 CFR Part 39

Docket ID: [Docket No. 2004-NM-36-AD]

RIN ID: RIN 2120-AA64

NOTICE: PROPOSED RULES

ACTION: Airworthiness directives:

DOCUMENT ACTION: Notice of proposed rulemaking (NPRM).

SUBJECT CATEGORY: Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135BJ and EMB-145XR Series Airplanes

DATES: Comments must be received by June 2, 2004.

DOCUMENT SUMMARY: This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB135BJ and EMB145XR series airplanes. This proposal would require installation of an additional indication device to the clear ice indication system. This action is necessary to prevent an undetected inflight buildup of clear ice on airplane control surfaces, which could lead to reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

SUMMARY: Empresa Brasileira de Aeronautica S.A. (EMBRAER),

SUPPLEMENTAL INFORMATION

Interested persons are invited to participate in the making of the proposed rule by submitting such written data, views, or arguments as they may desire. Communications shall identify the Rules Docket number and be submitted in triplicate to the address specified above. All communications received on or before the closing date for comments, specified above, will be considered before taking action on the proposed rule. The proposals contained in this action may be changed in light of the comments received.

Submit comments using the following format:
Organize comments issuebyissue. For example, discuss a request to change the compliance time and a request to change the service bulletin reference as two separate issues.
For each issue, state what specific change to the proposed AD is being requested.
Include justification (e.g., reasons or data) for each request.

Comments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the proposed rule. All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. A report summarizing each FAApublic contact concerned with the substance of this proposal will be filed in the Rules Docket.

Commenters wishing the FAA to acknowledge receipt of their comments submitted in response to this action must submit a selfaddressed, stamped postcard on which the following statement is made: ``Comments to Docket Number 2004NM36AD.'' The postcard will be date stamped and returned to the commenter.

Availability of NPRMs

Any person may obtain a copy of this NPRM by submitting a request to the FAA, Transport Airplane Directorate, ANM114, Attention: Rules Docket No. 2004NM36AD, 1601 Lind Avenue, SW., Renton, Washington 980554056.

Discussion

The Departamento de Aviacao Civil (DAC), which is the airworthiness authority for Brazil, notified the FAA that an unsafe condition may exist on certain EMBRAER Model EMB135BJ and EMB145XR series airplanes. The DAC advises that a risk assessment has shown that the reliability level of the clear ice indication system is not sufficient. This condition, if not corrected, could result in undetected inflight buildup of clear ice on airplane control surfaces, which could lead to reduced controllability of the airplane.

Explanation of Relevant Service Information

EMBRAER has issued Service Bulletins 145300035, Revision 01 (for Model EMB145XR series airplanes), dated September 2, 2003; and 145LEG 300002 (for Model EMB135BJ series airplanes), dated September 2, 2003. These service bulletins describe procedures for installation of an additional indication device to the clear ice indication system. The DAC classified these service bulletins as mandatory and issued airworthiness directive 20040101, dated January 27, 2004, to ensure the continued airworthiness of these airplanes in Brazil.

Operators should be aware that Service Bulletin 145LEG300002 (for Model EMB135BJ series airplanes), dated September 2, 2003, specifies prior or concurrent accomplishment of EMBRAER Service Bulletin 145LEG 250027, dated May 7, 2003, which describes procedures for removal of the Inlet Turbine Temperature (ITT)related placard from the main panel of the cockpit.
[[Page 24096]]

FAA's Conclusions

These airplane models are manufactured in Brazil and are type certificated for operation in the United States under the provisions of section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and the applicable bilateral airworthiness agreement. Pursuant to this bilateral airworthiness agreement, the DAC has kept the FAA informed of the situation described above. The FAA has examined the findings of the DAC, reviewed all available information, and determined that AD action is necessary for products of this type design that are certificated for operation in the United States.

Explanation of Requirements of Proposed Rule

Since an unsafe condition has been identified that is likely to exist or develop on other airplanes of the same type design registered in the United States, the proposed AD would require accomplishment of the actions specified in the applicable service bulletins described previously, except as discussed below.
Differences Between Proposed Rule and Foreign Airworthiness Directive

The Brazilian airworthiness directive applies to ``all EMB145XR and EMB135BJ aircraft in operation.'' The service bulletins apply to certain EMB145XR and EMB135BJ series airplanes having certain serial numbers. As coordinated with the DAC, this proposed AD applies only to those airplanes having serial numbers listed in the service bulletins. Cost Impact

The FAA estimates that 49 airplanes of U.S. registry would be affected by this proposed AD. The average labor rate is $65 per work hour. Costs per airplane are listed in Table 1 of this proposed AD. Based on these figures, the cost impact of the proposed AD on U.S. operators is estimated to be $74,475.
Table 1.Cost Estimates No. of Cost per Airplane model airplanes Work hours Parts cost airplane EMB145XR................................................... 41 15 $460 $1,435 EMB135BJ................................................... 8 23 460 1,955

The cost impact figures discussed above are based on assumptions that no operator has yet accomplished any of the proposed requirements of this AD action, and that no operator would accomplish those actions in the future if this AD were not adopted. The cost impact figures discussed in AD rulemaking actions represent only the time necessary to perform the specific actions actually required by the AD. These figures typically do not include incidental costs, such as the time required to gain access and close up, planning time, or time necessitated by other administrative actions.

Regulatory Impact

The regulations proposed herein 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. Therefore, it is determined that this proposal would not have federalism implications under Executive Order 13132.

For the reasons discussed above, I certify that 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) if promulgated, 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 copy of the draft regulatory evaluation prepared for this action is contained in the Rules Docket. A copy of it may be obtained by contacting the Rules Docket at the location provided under the caption ADDRESSES. List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Safety. The Proposed Amendment

Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration proposes to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows:

PART 39AIRWORTHINESS DIRECTIVES

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

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

Sec. 39.13 [Amended]

2. Section 39.13 is amended by adding the following new airworthiness directive:
Empresa Brasileira de Aeronautica S.A. (EMBRAER): Docket 2004NM36 AD.

Applicability: Model EMB135BJ and EMB145XR series airplanes, certificated in any category, as listed in EMBRAER Service Bulletin 145300035, Revision 01, dated September 2, 2003; or 145LEG30 0002, dated September 2, 2003.

Compliance: Required as indicated, unless accomplished previously.

To prevent undetected inflight buildup of clear ice on airplane control surfaces, which could lead to reduced controllability of the airplane, accomplish the following:
Service Bulletin References
(a) The term ``service bulletin,'' as used in this AD, means the Accomplishment Instructions of the following service bulletins, as applicable:
(1) For Model EMB145XR series airplanes: EMBRAER Service Bulletin 145300035, Revision 01, dated September 2, 2003; and (2) For Model EMB135BJ series airplanes: EMBRAER Service Bulletin 145LEG300002, dated September 2, 2003.
(b) Actions accomplished before the effective date of this AD in accordance with EMBRAER Service Bulletin 145300035, dated July 16, 2003, are considered acceptable for compliance with the
corresponding actions specified in this AD.
Modification of Clear Ice Indication System
(c) Within 24 months or 5,000 flight hours after the effective date of this AD, whichever comes first, install an additional indication device to the clear ice indication system in accordance with the Accomplishment Instructions of the applicable service bulletin.
Concurrent Service Bulletin
(d) For airplanes listed in EMBRAER Service Bulletin 145LEG30 0002, dated September 2, 2003: Prior to or concurrent with the accomplishment of paragraph (c) of this AD, remove the Inlet Turbine Temperature (ITT)related placard from the main panel of the cockpit in accordance with the Accomplishment Instructions of EMBRAER Service Bulletin 145LEG250027, dated May 7, 2003.
Alternative Methods of Compliance
(e) In accordance with 14 CFR 39.19, the Manager, International Branch, ANM116,
[[Page 24097]]
FAA, Transport Airplane Directorate, is authorized to approve alternative methods of compliance for this AD.

Note 1: The subject of this AD is addressed in Brazilian airworthiness directive 20040101, dated January 27, 2004.

Issued in Renton, Washington, on April 23, 2004. Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification Service.
[FR Doc. 049905 Filed 43004; 8:45 am]
BILLING CODE 491013P

FOR FURTHER INFORMATION CONTACT Todd Thompson, Aerospace Engineer; International Branch, ANM116, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 980554056; telephone (425) 2271175; fax (425) 2271149.