[Federal Register Volume 63, Number 70 (Monday, April 13, 1998)]
[Rules and Regulations]
[Pages 17931-17932]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-9587]
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Rules and Regulations
Federal Register
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This section of the FEDERAL REGISTER contains regulatory documents
having general applicability and legal effect, most of which are keyed
to and codified in the Code of Federal Regulations, which is published
under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.
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Federal Register / Vol. 63, No. 70 / Monday, April 13, 1998 / Rules
and Regulations
[[Page 17931]]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 97-NM-93-AD; Amendment 39-10442; AD 98-07-21]
RIN 2120-AA64
Airworthiness Directives; Lockheed Model 1329-23 and -25 Series
Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
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SUMMARY: This amendment adopts a new airworthiness directive (AD),
applicable to certain Lockheed Model 1329-23 and -25 series airplanes,
that requires replacement of a certain tailpipe V-band coupling with a
new tailpipe V-band coupling. This amendment is prompted by reports
indicating that the flight crew received a fire/overheat warning as a
result of displacement of engine tailpipes, which allowed hot exhaust
gases into the engine bypass duct. The actions specified by this AD are
intended to prevent such displacement, which could result in escape of
the hot exhaust gases from the engine tailpipe, and consequent damage
to adjacent structure.
EFFECTIVE DATE: May 18, 1998.
ADDRESSES: Information pertaining to this amendment may be obtained
from or examined at the Federal Aviation Administration (FAA),
Transport Airplane Directorate, Rules Docket, 1601 Lind Avenue, SW.,
Renton, Washington 98055-4056; or at the FAA, Small Airplane
Directorate, Atlanta Aircraft Certification Office, One Crown Center,
1895 Phoenix Boulevard, Suite 450, Atlanta, Georgia 30349.
FOR FURTHER INFORMATION CONTACT: Thomas Peters, Aerospace Engineer,
Systems and Flight Test Branch, ACE-116A, FAA, Small Airplane
Directorate, Atlanta Aircraft Certification Office, One Crown Center,
1895 Phoenix Boulevard, suite 450, Atlanta, Georgia 30349; telephone
(770) 703-6063; fax (770) 703-6097.
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 Lockheed Model 1329-23 and
-25 series airplanes was published in the Federal Register on January
8, 1998 (63 FR 1076). That action proposed to require replacement of a
certain tailpipe V-band coupling with a new tailpipe V-band coupling.
The FAA has been informed that a substantial number of airplanes
already have been equipped with the subject engine tailpipe V-band
couplings, part number (P/N) NH1003605-10. The FAA finds that, if new
couplings already have been installed and such installation is
reflected in airplane service records, independent confirmation is
unnecessary. Therefore, the body of the AD has been revised to
incorporate a note that allows this compliance option.
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, with the changes previously
described.
Cost Impact
There are approximately 91 Model 1329-25 and -23 series airplanes
of the affected design in the worldwide fleet.
The FAA estimates that 25 Model 1329-25 (JetStar II) series
airplanes of U.S. registry will be affected by this AD, that it will
take approximately 60 work hours per airplane to accomplish the
required actions, and that the average labor rate is $60 per work hour.
Required parts will cost approximately $726 per airplane. Based on
these figures, the cost impact of the AD on U.S. operators is estimated
to be $108,150, or $4,326 per airplane.
The FAA estimates that 35 Model 1329-23 (731 JetStar) series
airplanes of U.S. registry will be affected by this AD, that it will
take approximately 60 work hours per airplane to accomplish the
required actions, and that the average labor rate is $60 per work hour.
Required parts will cost approximately $1,200 per airplane. Based on
these figures, the cost impact of the AD on U.S. operators of these
airplanes is estimated to be $168,000, or $4,800 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 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, 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:
[[Page 17932]]
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:
98-07-21 Lockheed Aeronautical Systems Company: Amendment 39-10442.
Docket 97-NM-93-AD.
Applicability: Model 1329-25 series airplanes equipped with an
engine tailpipe V-band coupling, part number (P/N) NH1002299-10; and
Model 1329-23 series airplanes that have been modified in accordance
with Supplemental Type Certificate (STC) SA2326SW, equipped with an
engine tailpipe V-band coupling, P/N NH1002299-10; certificated in
any category.
Note 1: This AD applies to each airplane identified in the
preceding applicability provision, regardless of whether it has been
otherwise 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 (c) 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 displacement of the engine tailpipes, which could
result in escape of hot exhaust gases from the engine tailpipe, and
consequent damage to adjacent structure, accomplish the following:
(a) Within 12 months after the effective date of this AD,
replace the tailpipe V-band coupling having P/N NH1002299-10 with a
new, redesigned coupling having P/N NH1003605-10, in accordance with
Step 1, Figure 71-1, of Lockheed JetStar II Handbook of Operating
and Maintenance Instructions, undated (for Model 1329-25 series
airplanes); or Step 8, Figure 71-1(S), of Garrett Airesearch
Aviation Company 731 JetStar document, undated (for Model 1329-23
series airplanes); as applicable.
Note 2: Installation of P/N NH1003605-10 prior to the effective
date of this AD is considered acceptable for meeting the replacement
requirement of paragraph (a) of this AD. Compliance may be
demonstrated by confirmation that the airplane maintenance records
reflect installation of P/N NH1003605-10 V-band couplings.
(b) As of 12 months after the effective date of this AD, no
person shall install a tailpipe V-band coupling, P/N NH1002299-10,
on any airplane.
(c) 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, Atlanta Aircraft Certification
Office (ACO), FAA, Small 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, Atlanta ACO.
Note 3: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Atlanta ACO.
(d) 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 a location where
the requirements of this AD can be accomplished.
(e) This amendment becomes effective on May 18, 1998.
Issued in Renton, Washington, on March 25, 1998.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 98-9587 Filed 4-10-98; 8:45 am]
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