AD 98-07-04

This amendment adopts a new airworthiness directive (AD), applicable to certain Dornier Model 328-100 series airplanes, that requires a one-time inspection for discrepancies of certain engine control cables, and replacement of the cables with new or serviceable control cables, if necessary. It also requires modification of the cable fairleads on the nose rib firewall. Additionally, this amendment requires modification of the mounting brackets of the control cable pulleys in the pulley box. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent chafing of engine control cables, which could cause the cables to break and result in loss of engine control and consequent reduced controllability of the airplane.

Final rule

98-07-04 DORNIER: Amendment 39-10422. Docket 97-NM-108-AD.
Applicability: Model 328-100 series airplanes; as listed in Dornier Service Bulletins SB-328- 76-152 and SB-328-76-168, both dated May 6, 1996; certificated in any category.

NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Compliance: Required as indicated, unless accomplished previously.

To prevent chafing of engine control cables, which could cause the control cables to break and result in loss of engine control and consequent reduced controllability of the airplane, accomplish the following:

(a) Within 90 days after the effective date of this AD, perform a one-time inspection to detect chafing or discrepancies of the engine control cables in the areas of the cable fairleads on the nose rib firewall, and the cable fairleads in the fuselage; in accordance with Dornier Service Bulletins SB- 328-76-152 and SB-328-76-168, both dated May 6, 1996; respectively. If any discrepancy or chafing is found, prior to further flight, replace the damaged cables with new or serviceable cables in accordance with the applicable service bulletin.

(b) For airplanes listed in Dornier Service Bulletin SB-328-76-152, dated May 6, 1996: Prior to further flight following the inspection required in paragraph (a) of this AD,modify the cable fairleads on the nose rib firewall in accordance with the service bulletin.

(c) For airplanes listed in Dornier Service Bulletin SB-328-76-168, dated May 6, 1996: Prior to further flight following the inspection required in paragraph (a) of this AD, modify the mounting brackets of the control cable pulleys in the pulley box in accordance with the service bulletin.

(d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, International Branch, ANM-116.

NOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the International Branch, ANM-116.

(e) Specialflight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished.

(f) The actions shall be done in accordance with Dornier Service Bulletin SB-328-76-152, dated May 6, 1996, and Dornier Service Bulletin SB-328-76-168, dated May 6, 1996. 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 may be obtained from FAIRCHILD DORNIER, DORNIER Luftfahrt GmbH, P.O. Box 1103, D-82230 Wessling, Germany. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

NOTE 3: The subject of this AD is addressed in German airworthiness directives 96-288 and 96-290, both dated October 10,1996.

(g) This amendment becomes effective on May 4, 1998.

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 Dornier Model 328-100 series airplanes was published in the Federal Register on January 22, 1998 (63 FR 3270). That action proposed to require a one-time inspection for discrepancies of certain engine control cables, and replacement of the cables with new or serviceable control cables, if necessary. That action also proposed to require modification of the cable fairleads on the nose rib firewall. Additionally, that action proposed to require modification of the mounting brackets of the control cable pulleys in the pulley box.

Comments
Interested persons have been afforded an opportunity to participate in the making of this amendment. Due consideration has been given to the single comment received.

The commenter supports the proposed rule.

Conclusion
After careful review of the available data, including the comment noted above, 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 59 Dornier Model 328-100 series airplanes of U.S. registry will be affected by this AD.

The actions specified in Dornier Service Bulletin SB-328-76-152 will be required to be accomplished on 56 Dornier Model 328-100 series airplanes of U.S. registry. It will take approximately 4 work hours per airplane to accomplish the required actions, at an average labor rate of $60 per work hour. Required parts will be provided by the manufacturer at no cost to operators. Based on these figures, the cost impact of this action on the 56 affected U.S.-registered airplanes is estimated to be $13,440, or $240 per airplane.

The actions specified in Dornier Service Bulletin SB-328-76-168 will be required to be accomplished on 29 Dornier Model 328-100 series airplanes of U.S. registry. It will take approximately 12 work hours per airplane to accomplish the required actions, at an average labor rate of $60 per work hour. Required parts will be provided by the manufacturer at no cost to operators. Based on these figures, the cost impact of this action on the 29 affected U.S.-registered airplanes is estimated to be $20,880, or $720 per airplane.

The cost impact figures discussed above are 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.

Regulatory Impact
The regulations adopted herein will not have substantial direct effects 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, in accordance with Executive Order 12612, it is determined that this final rule does not have sufficient federalism implications towarrant the preparation of a Federalism Assessment.

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 CFRpart 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: