The FAA proposed to amend 14 CFR part 39 with an AD for certain Avcraft Dornier Model 328-100 and -300 series airplanes. That action, published in the Federal Register on April 6, 2005 (70 FR 17357), proposed to require a pressure test and detailed inspection of each fuselage drain line to determine if there is a blockage, and related investigative/corrective actions if necessary.
Comments
We provided the public the opportunity to participate in the development of this AD. No comments have been submitted on the proposed AD or on the determination of the cost to the public.
Explanation of Change to Applicability
We have revised the applicability of the proposed AD to identify model designations as published in the most recent type certificate data sheet for the affected models. In addition, we noticed that we had inadvertently reversed the qualifiers of the airplane models specified in the applicability of the proposed AD. The applicability for this AD has been corrected for this AD and now reads, "This AD applies to Avcraft Dornier Model 328-100 series airplanes having serial numbers 3005 through 3119 inclusive, and Avcraft Dornier Model 328-300 series airplanes without option 033F003 "Extended Range" installed; certificated in any category."
Conclusion
We have carefully reviewed the available data and determined that air safety and the public interest require adopting the AD with the changes described previously. We have determined that these changes will neither increase the economic burden on any operator nor increase the scope of the AD.
Costs of Compliance
We estimate that this AD affects about 53 Model 328-100 airplanes and 57 Model 328-300 airplanes of U.S. registry. The following table provides the estimated costs for U.S. operators to comply with this AD.
Estimated Costs
Action
Work hours
Average labor rate per hour
Parts
Cost per airplane
Number of U.S.-
registered airplanes
Fleet cost
Pressure test
2
$65
None
$130
110
$14,300
Detailed inspection
5
65
None
325
110
35,750
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 have determined that this AD will not have federalism implications under Executive Order 13132. This AD will 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 that this AD:
(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.
We prepared a regulatory evaluation of the estimated costs to comply with this AD. See the ADDRESSES section for a location to examine the regulatory evaluation.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Adoption of the Amendment
Accordingly, under the authority delegated to me by the Administrator, the FAA amends 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.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD):