[Federal Register Volume 63, Number 110 (Tuesday, June 9, 1998)]
[Rules and Regulations]
[Page 31347]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-15133]



[[Page 31347]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-NM-321-AD; Amendment 39-10444; AD 98-12-17]
RIN 2120-AA64


Airworthiness Directives; British Aerospace Model Viscount 744, 
745, 745D, and 810 Series Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Direct final rule; confirmation of effective date.

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SUMMARY: This document confirms the effective date of a direct final 
rule published on April 2, 1998, which adopted a new airworthiness 
directive (AD) that is applicable to all British Aerospace Model 
Viscount 744, 745, 745D, and 810 series airplanes. This amendment 
requires repetitive inspections to detect cracking and corrosion of 
components of the engine nacelle subframe structure, and corrective 
action, if necessary; and replacement of any component that has reached 
its life limit (safe life) with a new or serviceable component. This 
amendment is prompted by issuance of mandatory continuing airworthiness 
information by a foreign civil airworthiness authority. The actions 
specified in this AD are intended to ensure periodic replacement of 
certain engine nacelle subframe components that have reached their 
maximum life limits. Cracking and corrosion of these components, if not 
detected and corrected in a timely manner, could result in reduced 
structural integrity of the engine nacelle subframe structure, 
separation of the engine from the airframe, and reduced controllability 
of the airplane.

EFFECTIVE DATE: The direct final rule published at 63 FR 16111 is 
effective on July 1, 1998.

FOR FURTHER INFORMATION CONTACT: Norman B. Martenson, Manager, 
International Branch, ANM-116, FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 
227-2110; fax (425) 227-1149.

SUPPLEMENTARY INFORMATION: The FAA published this direct final rule 
with request for comments in the Federal Register on April 2, 1998 (63 
FR 16111). The FAA uses the direct final rulemaking procedure for a 
non-controversial rule where the FAA anticipates that there will be no 
adverse public comment. This direct final rule advised the public that 
no adverse comments were anticipated, and that unless a written adverse 
comment, or a written notice of intent to submit such an adverse 
comment, was received within the comment period, the regulation would 
become effective on July 1, 1998. No adverse comments were received, 
and thus this document confirms that this final rule will become 
effective on that date, with the airworthiness directive (AD) number 
shown at the beginning of this document.

    Issued in Renton, Washington, on June 2, 1998.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 98-15133 Filed 6-8-98; 8:45 am]
BILLING CODE 4910-13-P