AD 2004-10-11

This amendment adopts a new airworthiness directive (AD), applicable to certain BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ series airplanes equipped with Pacific Scientific engine fire extinguisher bottles. This amendment would require a one- time inspection to detect discrepancies in the wiring installation of the engine fire extinguisher bottles, and related investigative/ corrective actions as necessary. This action is necessary to prevent the inability of the left-hand fire extinguisher on one or more engines to discharge, and consequent inability to control or suppress an engine fire. This action is intended to address the identified unsafe condition.

Final rule.

2004-10-11 Bae Systems (Operations) Limited (Formerly British Aerospace Regional Aircraft): Amendment 39-13641. Docket 2002-NM- 343-AD.

Applicability: Model BAe 146 and Avro 146-RJ series airplanes, equipped with Pacific Scientific engine fire extinguisher bottles, and having BAE Systems (Operations) Limited Modification HCM01688A, and either HCM01582A or HCM01582B installed; certificated in any category;

Compliance: Required as indicated, unless accomplished previously.

To prevent the inability of the left-hand fire extinguisher bottle on one or more engines to discharge, and consequent inability to control or suppress an engine fire, accomplish the following:

Inspection, Test, and Related Investigative/Corrective Actions

(a) Within 6 months after the effective date of this AD: Do a one-time detailed inspection to detect discrepancies in the wiring installation of the fire extinguisher bottles for the engines, a one-time test of the wiring for the indicatingsystem of the engine fire extinguishing system, and all applicable related investigative/ corrective actions, per the Accomplishment Instructions of BAE Systems (Operations) Limited Inspection Service Bulletin ISB.26-065, dated September 16, 2002. Do all of the actions per the service bulletin. Any corrective actions must be done before further flight. Although the service bulletin specifies to submit certain information to the manufacturer, this AD does not include such a requirement.

Note 1: For the purposes of this AD, a detailed inspection is defined as: "An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required."

Credit for Actions Done per Other Service Information

(b) For airplanes with BAE Systems (Operations) Limited Modification HCM01582B installed: Accomplishment of BAE Systems (Operations) Limited Inspections Service Bulletin 26-060 (Inspection for Cross Connection of Wiring on Pacific Scientific Fire Extinguishers) on each engine is considered acceptable for compliance with the requirements of this AD.

Alternative Methods of Compliance

(c) In accordance with 14 CFR 39.19, the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate, is authorized to approve alternative methods of compliance for this AD.

Incorporation by Reference

(d) Unless otherwise specified in this AD, the actions shall be done in accordance with BAE Systems (Operations) Limited Inspection Service Bulletin ISB.26-065, dated September 16, 2002. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies maybe obtained from British Aerospace Regional Aircraft American Support, 13850 Mclearen Road, Herndon, Virginia 20171. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html .

Note 2: The subject of this AD is addressed in British airworthiness directive 003-09-2002.

Effective Date

(e) This amendment becomes effective on June 25, 2004.

A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an airworthiness directive (AD) that is applicable to certain BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ series airplanes equipped with Pacific Scientific engine fire extinguisher bottles was published in the Federal Register on March 17, 2004 (69 FR 12585). That action proposed to require a one-time inspection to detect discrepancies in the wiring installation of the engine fire extinguisher bottles, and related investigative/corrective actions as necessary.

Comments

Interested persons have been afforded an opportunity to participate in the making of this amendment. No comments were submitted in response to the proposal or the FAA's determination of the cost to the public.

Conclusion

The FAA has determined that air safety and the public interest require the adoption of the rule as proposed.

Cost Impact

The FAA estimates that 54 airplanes of U.S. registry will be affected by this AD, that it will take approximately 3 work hours per airplane to accomplish the required actions, and that the average labor rate is $65 per work hour. Based on these figures, the cost impact of the AD on U.S. operators is estimated to be $10,530, or $195 per airplane.

The cost impact figure discussed above is based on assumptions that no operator has yet accomplished any of the 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 adopted herein will not have a substantial directeffect 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 final rule does not have federalism implications under Executive Order 13132.

For the reasons discussed above, I certify that this action (1) is not a "significant regulatory action" under Executive Order 12866; (2) is not a "significant rule" under 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. A final evaluation has been prepared for this action and it is contained in the Rules Docket. A copy of it may be obtained from the Rules Docket at the location provided under the caption ADDRESSES.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

Adoption of the Amendment

Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (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. Section 39.13 is amended by adding the following new airworthiness directive: