[Federal Register Volume 62, Number 15 (Thursday, January 23, 1997)]
[Rules and Regulations]
[Pages 3449-3451]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-881]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 96-NM-243-AD; Amendment 39-9889; AD 97-02-05]
RIN 2120-AA64
Airworthiness Directives; Jetstream Model 4101 Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
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SUMMARY: This amendment supersedes an existing airworthiness directive
(AD), applicable to certain Jetstream Model 4101 airplanes, that
currently requires, among other things, replacing certain yaw damper
servos in the autopilot system, or rendering the servo inoperative. The
actions specified by that AD are intended to prevent overheat failure
of the Flight Control Computer (FCC), which could result in smoke in
the flight deck that could inhibit the ability of the flightcrew to
safely operate and land the airplane. This new amendment requires
installation of circuit breakers on the avionics relay panel, which,
when accomplished, constitutes terminating action for the previous
requirements of the AD.
DATES: Effective February 27, 1997.
The incorporation by reference of Jetstream Service Bulletin J41-
22-006, dated July 1, 1996, as listed in the regulations, is approved
by the Director of the Federal Register as of February 27, 1997.
The incorporation by reference of Jetstream Alert Service Bulletin
J41-22-005, dated July 1, 1996, as listed in the regulations, was
approved previously by the Director of the Federal Register as of
October 1, 1996 (61 FR 48614, September 16, 1996).
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) by superseding AD 96-19-06,
amendment 39-9754 (61 FR 48614, September 16, 1996), which is
applicable to certain Jetstream Model 4101 airplanes, was published in
the Federal Register on October 23, 1996 (61 FR 54967). The action
proposed to supersede AD 96-19-06 to continue to require the actions
currently specified in that AD:
1. A one-time inspection of the airplane records to determine:
--the serial number,
--the total number of hours time-in-service accumulated,
--the date of installation of the yaw damper servo in the autopilot
system; and
--the date of installation of a particular kit, if installed.
2. Removal and replacement of certain yaw damper servos, or
rendering the yaw damper servo inoperative.
The action also proposed to add a requirement to install circuit
breakers on the avionics relay panel. When accomplished, this
installation would constitute terminating action for the previous
requirements of the AD.
Interested persons have been afforded an opportunity to participate
in the making of this amendment. No
[[Page 3450]]
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
There are approximately 55 Jetstream Model 4101 airplanes of U.S.
registry that will be affected by this AD.
The actions that are currently required by AD 96-19-06 take
approximately 2 to 5 work hours per airplane to accomplish, at an
average labor rate of $60 per work hour. Based on these figures, the
cost impact of the previously required actions on U.S. operators is
estimated to be between $6,600 and $16,500, or between $120 and $300
per airplane.
The new action (installation of circuit breakers) that is required
by this new AD will take approximately 3 work hours per airplane to
accomplish, at an average labor rate of $60 per work hour. Required
parts will be provided by the manufacturer at no cost to operators.
Based on these figures, the cost impact of the installation requirement
of this AD on U.S. operators is estimated to be $9,900, or $180 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, 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 removing amendment 39-9754 (61 FR
48614, September 16, 1996), and by adding a new airworthiness directive
(AD), amendment 39-9889, to read as follows:
97-02-05 Jetstream Aircraft Limited: Amendment 39-9889. Docket 96-
NM-243-AD. Supersedes AD 96-19-06, Amendment 39-9754.
Applicability: Model 4101 airplanes having serial numbers 41004
through 41092, inclusive; on which Jetstream Service Bulletin J41-
22-006, dated July 1, 1996 (Kit JK42867), has not been accomplished;
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 (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 overheat failure of the Flight Control Computer
(FCC), which could result in smoke in the flight deck that could
inhibit the ability of the flightcrew to safely operate and land the
airplane, accomplish the following:
(a) Within 14 days after October 1, 1996 (the effective date of
AD 96-19-06), perform a one-time inspection of the airplane records
to determine the serial number, the total number of hours time-in-
service accumulated, and the date of installation of the yaw damper
servo in the autopilot system; and to determine the date of
installation of Kit JK42716 (reference Jetstream Service Bulletin
J41-53-016 or J41-22-007), if installed. Accomplish the inspection
in accordance with Part 1 of the Accomplishment Instructions of
Jetstream Alert Service Bulletin J41-A22-005, dated July 1, 1996.
Thereafter, either remove and replace the yaw damper servo and
install Kit JK42716 (if not installed previously), or render the yaw
damper servo inoperative, in accordance with Part 2 or 3 of the
alert service bulletin, respectively, at the time specified in
paragraph (a)(1), (a)(2), or (a)(3) of this AD, as applicable.
(1) If Kit JK42716 has not been installed: Prior to the
accumulation of 1,000 hours total time-in-service on the yaw damper
servo, or within 30 days after October 1, 1996, whichever occurs
later.
(2) If Kit JK42716 has been installed and the yaw damper servo
was installed prior to the installation of Kit JK42716: Prior to the
accumulation of 1,000 hours total time-in-service on the yaw damper
servo, or within 30 days after October 1, 1996, whichever occurs
later.
(3) If Kit JK42716 has been installed and the yaw damper servo
was installed after the installation of Kit JK42716: Prior to the
accumulation of 3,000 total hours time-in-service on the yaw damper
servo, or within 30 days after October 1, 1996, whichever occurs
later.
(b) Within 90 days after the effective date of this AD, install
circuit breakers on the avionics relay panel (Kit JK42867) in
accordance with Jetstream Service Bulletin J41-22-006, dated July 1,
1996. Accomplishment of this installation constitutes terminating
action for the requirements of paragraph (a) of this AD.
(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 Alert
Service Bulletin J41-A22-005, dated July 1, 1996; and Jetstream
Service Bulletin J41-22-006, dated July 1, 1996. The incorporation
by reference of Jetstream Alert Service Bulletin J41-A22-005, dated
July 1, 1996, was approved previously by the Director of the Federal
Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51 as of
October 1, 1996 (61
[[Page 3451]]
FR 48614, September 16, 1996). The incorporation by reference of
Jetstream Service Bulletin J41-22-006, dated July 1, 1996, 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 January 23, 1997.
Issued in Renton, Washington, on February 27, 1997.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 97-881 Filed 1-22-97; 8:45 am]
BILLING CODE 4910-13-U
