[Federal Register Volume 62, Number 102 (Wednesday, May 28, 1997)]
[Rules and Regulations]
[Pages 28795-28796]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-12858]
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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
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The Code of Federal Regulations is sold by the Superintendent of Documents.
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Federal Register / Vol. 62, No. 102 / Wednesday, May 28, 1997 / Rules
and Regulations
[[Page 28795]]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 96-NM-85-AD; Amendment 39-10031; AD 97-11-02]
RIN 2120-AA64
Airworthiness Directives; Jetstream Model 4101 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 Jetstream Model 4101 airplanes, that requires an
inspection to determine the thickness of the intercostal that attaches
the third crew member seat to the floor structure in the flight
compartment, and replacement, if necessary. This amendment is prompted
by a report from the manufacturer indicating that intercostals have
been installed that are not of sufficient thickness (and consequent
strength) to support the third crew member seat during emergency
landing dynamic conditions. The actions specified by this AD are
intended to prevent the failure of this intercostal during an emergency
landing, which could consequently result in injury to the flight crew.
DATES: Effective July 2, 1997.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of July 2, 1997.
ADDRESSES: The service information referenced in this AD may be
obtained from Jetstream Aircraft, Inc., P.O. Box 16029, Dulles
International Airport, Washington, DC 20041-6029. 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: William Schroeder, Aerospace Engineer,
Standardization Branch, ANM-113, FAA, Transport Airplane Directorate,
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425)
227-2148; 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 Jetstream Model 4101
airplanes was published in the Federal Register on October 28, 1996 (61
FR 55585). That action proposed to require inspection of the
intercostal that attaches the third crew member seat to the floor
structure in the flight compartment to determine the thickness of this
part; and replacement with a new intercostal of the correct thickness,
if necessary.
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 15 Jetstream Model 4101 airplanes of U.S.
registry will be affected by this AD, that it will take approximately 1
work hour per airplane to accomplish the required actions, and that the
average labor rate is $60 per work hour. Based on these figures, the
cost impact of the AD on U.S. operators is estimated to be $900, or $60
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:
97-11-02 Jetstream Aircraft Limited: Amendment 39-10031. Docket 96-
NM-85-AD.
Applicability: Model 4101 airplanes, as listed in Jetstream
Alert Service Bulletin J41-A53-030, dated January 19, 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
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
[[Page 28796]]
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 failure during emergency landing dynamic conditions
of the intercostal that attaches the third crew member seat (``third
crew seat'') to the floor structure in the flight compartment, which
could consequently result in injury to the flight crew, accomplish
the following:
(a) Within 30 days after the effective date of this AD, inspect
the intercostal in the floor structure that supports the third crew
seat in the flight compartment to determine the thickness of this
part, in accordance with Part 1 of Jetstream Alert Service Bulletin
J41-A53-030, dated January 19, 1996.
(b) If the thickness of the intercostal is 0.064 inch, no
further action is required by this AD.
(c) If the thickness of the intercostal is 0.048 inch,
accomplish the actions specified in either paragraph (c)(1) or
(c)(2) of this AD.
(1) Prior to further flight, replace the intercostal with a new
part manufactured from material having the correct thickness, in
accordance with Jetstream Alert Service Bulletin J41-A53-030, dated
January 19, 1996. After replacement, no further action is required
by this AD. Or
(2) Prior to further flight, install a placard, in accordance
with Jetstream Alert Service Bulletin J41-A53-030, dated January 19,
1996, to prohibit use of the third crew seat when the total weight
of carry-on items stored in the forward right stowage area is more
than 100 pounds. Within 6 months after installation of the placard,
replace the intercostal with a new part manufactured from material
having the correct thickness, in accordance with the service
bulletin. After installation of the new intercostal, the placard may
be removed.
(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, Standardization Branch, ANM-113,
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,
Standardization Branch, ANM-113.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Standardization Branch, ANM-113.
(e) 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.
(f) The actions shall be done in accordance with Jetstream Alert
Service Bulletin J41-A53-030, dated January 19, 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 Jetstream Aircraft, Inc., P.O. Box
16029, Dulles International Airport, Washington, DC 20041-6029.
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.
(g) This amendment becomes effective on July 2, 1997.
Issued in Renton, Washington, on May 12, 1997.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 97-12858 Filed 5-27-97; 8:45 am]
BILLING CODE 4910-13-U
