[Federal Register Volume 63, Number 171 (Thursday, September 3, 1998)]
[Rules and Regulations]
[Pages 46873-46875]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-23602]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 98-NM-167-AD; Amendment 39-10734; AD 98-18-18]
RIN 2120-AA64
Airworthiness Directives; British Aerospace (Jetstream) Model
4101 Airplanes
AGENCY: Federal Aviation Administration, DOT.
[[Page 46874]]
ACTION: Final rule.
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SUMMARY: This amendment adopts a new airworthiness directive (AD),
applicable to certain British Aerospace (Jetstream) Model 4101
airplanes, that requires modification of the attach points of the
uplock system of the nose landing gear (NLG). 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 wear of the attach points of the uplock
system of the NLG; such wear could result in damage to the adjacent
emergency hydraulic system, or jamming of the uplock system and
consequent inability to extend and retract the NLG.
DATES: Effective October 8, 1998.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of October 8, 1998.
ADDRESSES: The service information referenced in this AD may be
obtained from AI(R) American Support, Inc., 13850 Mclearen Road,
Herndon, Virginia 20171. This information may be examined at the
Federal Aviation Administration (FAA), Transport Airplane Directorate,
Rules Docket, 1601 Lind Avenue, SW., Renton, Washington; or at the
Office of the Federal Register, 800 North Capitol Street, NW., suite
700, Washington, DC.
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: 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 British Aerospace
(Jetstream) Model 4101 airplanes was published in the Federal Register
on July 7, 1998 (63 FR 36630). That action proposed to require
modification of the attach points of the uplock system of the nose
landing gear (NLG).
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 58 airplanes of U.S. registry will be
affected by this AD, that it will take approximately 10 work hours per
airplane to accomplish the required modification, and that the average
labor rate is $60 per work hour. Required parts will cost approximately
$170 per airplane. Based on these figures, the cost impact of the AD on
U.S. operators is estimated to be $44,660, or $770 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.
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 to warrant 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 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. Section 39.13 is amended by adding the following new
airworthiness directive:
98-18-18 British Aerospace Regional Aircraft [Formerly Jetstream
Aircraft Limited; British Aerospace (Commercial Aircraft) Limited];
Amendment 39-10734. Docket 98-NM-167-AD.
Applicability: Jetstream Model 4101 airplanes, constructor's
numbers 41004 through 41100 inclusive; 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 (b) 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 wear of the attach points of the uplock system of the
nose landing gear (NLG), which could result in damage to the
adjacent emergency hydraulic system, or jamming of the uplock
system, and consequent inability to extend and retract the NLG,
accomplish the following:
(a) Prior to the accumulation of 9,000 total landings, or within
1,000 landings after the effective date of this AD, whichever occurs
later, modify the attach points of the uplock system of the NLG, in
accordance with Jetstream Alert Service Bulletin J41-53-041, dated
July 25, 1997.
(b) 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.
(c) Special flight 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
[[Page 46875]]
a location where the requirements of this AD can be accomplished.
(d) The modification shall be done in accordance with Jetstream
Alert Service Bulletin J41-53-041, dated July 25, 1997. 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 AI(R) American Support, Inc., 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 Office of the Federal Register, 800
North Capitol Street, NW., suite 700, Washington, DC.
Note 3: The subject of this AD is addressed in British
airworthiness directive 009-07-97.
(e) This amendment becomes effective on October 8, 1998.
Issued in Renton, Washington, on August 26, 1998.
Vi L. Lipski,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 98-23602 Filed 9-2-98; 8:45 am]
BILLING CODE 4910-13-P
