[Federal Register Volume 60, Number 201 (Wednesday, October 18, 1995)]
[Rules and Regulations]
[Pages 53859-53860]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-25601]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 94-NM-242-AD; Amendment 39-9405; AD 95-21-18]
Airworthiness Directives; Jetstream Model ATP 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 ATP airplanes, that requires an
inspection to ensure that various components of the retraction actuator
of the nose landing gear (NLG) are secure, and an inspection of the
bearing cap mounting holes for correct hole and thread length. This AD
also requires a later inspection for certain discrepancies of the
retraction actuator; installation of revised tolerance bushings; and
correction of any discrepancy found. This amendment is prompted by
reports of failure of the attachment bolts of the bearing cap of the
retraction actuator of the NLG. The actions specified by this AD are
intended to prevent the inability to raise or lower the NLG, or
possible collapse of the NLG, due to failure of the attachment bolts of
the bearing cap.
DATES: Effective November 17, 1995.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of November 17, 1995.
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 (206)
227-2148; fax (206) 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 ATP
airplanes was published in the Federal Register on June 12, 1995 (60 FR
30797). That action proposed to require an inspection to ensure that
the bearing caps, bolts, and special washers are secure; and an
inspection of the bearing cap mounting holes for correct hole and
thread length. That action also proposed to require a later inspection
for discrepancies of the retraction actuator; installation of revised
tolerance bushings; and alignment of the outboard support bracket, if
necessary. That action also proposed to require corrective actions for
any discrepancy found.
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.
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.
The FAA estimates that 10 airplanes of U.S. registry will be
affected by this AD, that it will take approximately 17 work hours per
airplane to accomplish the required actions, and that the average labor
rate is $60 per work hour. Required parts will be provided by the
manufacturer at no cost to the operator. Based on these figures, the
total cost impact of the AD on U.S. operators is estimated to be
$10,200, or $1,020 per airplane.
The total 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.
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 USC 106(g), 40101, 40113, 44701.
Sec. 39.13 [Amended]
2. Section 39.13 is amended by adding the following new
airworthiness directive:
95-21-18 Jetstream Aircraft Limited (Formerly, British Aerospace
Commercial Aircraft Limited): Amendment 39-9405. Docket 94-NM-242-
AD.
[[Page 53860]]
Applicability: Model ATP airplanes, constructor's numbers 2002
through 2056 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 use the authority
provided in paragraph (c) of this AD to request approval from the
FAA. This approval may address either no action, if the current
configuration eliminates the unsafe condition; or different actions
necessary to address the unsafe condition described in this AD. Such
a request should include an assessment of the effect of the changed
configuration on the unsafe condition addressed by this AD. In no
case does the presence of any modification, alteration, or repair
remove any airplane from the applicability of this AD.
Compliance: Required as indicated, unless accomplished
previously.
To prevent the inability to raise or lower the nose landing gear
(NLG), or a possible collapse of the NLG, accomplish the following:
(a) Within 300 hours time-in-service or 90 days after the
effective date of this AD, whichever occurs first: Perform an
inspection to ensure that the components of the bracket attachment
assembly of the retraction actuator of the NLG are secure, and to
ensure that the inboard and outboard support brackets of the
mounting holes of the bearing cap have correct hole and thread
lengths, in accordance with paragraph 2.A. of the Accomplishment
Instructions of Jetstream Service Bulletin ATP-53-30-10372A, dated
November 3, 1994. If any discrepancy is found, prior to further
flight, correct the discrepancy in accordance with the service
bulletin.
(b) Within 3,000 landings, or 12 months after the effective date
of this AD, whichever occurs first: Install revised tolerance
bushings in the bearing cap/bracket attachment assemblies of the NLG
retraction actuator, test the actuator for freedom of movement, and
inspect for any discrepancy of the actuator, in accordance with
paragraph 2.B. of the Accomplishment Instructions of Jetstream
Service Bulletin ATP-53-30-10372A, dated November 3, 1994.
(1) If no discrepancy is found no further action is required by
this AD.
(2) If any discrepancy is found, prior to further flight,
correct the discrepancy in accordance with the service bulletin.
(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, 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.
(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) The actions shall be done in accordance with Jetstream
Service Bulletin ATP-53-30-10372A, dated November 3, 1994. 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.
(f) This amendment becomes effective on November 17, 1995.
Issued in Renton, Washington, on October 10, 1995.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 95-25601 Filed 10-17-95; 8:45 am]
BILLING CODE 4910-13-U
