[Federal Register Volume 60, Number 105 (Thursday, June 1, 1995)]
[Rules and Regulations]
[Pages 28529-28531]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-13120]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 90-CE-67-AD; Amendment 39-9250; AD 95-11-17]
Airworthiness Directives; Jetstream Aircraft Limited (Formerly
British Aerospace, Regional Aircraft Limited) Jetstream Models 3101 and
3201 Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
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SUMMARY: This amendment supersedes Airworthiness Directive (AD) 90-13-
12, which currently requires modifying the airplane electrical system
and revising the emergency procedures section of the Airplane Flight
Manual (AFM) on certain Jetstream Aircraft Limited (JAL) Jetstream
Models 3101 and 3201 airplanes. This action retains the requirements of
AD 90-13-12 for those airplanes that do not have modified inverters
installed and the inverted transfer function restored. The Federal
Aviation Administration (FAA) has determined that installing modified
inverters along with restoring the inverter transfer function corrects
the problems in the power supply addressed by AD 90-13-12. The actions
specified by this AD are intended to prevent alternating current system
failures, which, if not detected and corrected, could result in damage
to the airplane navigational systems.
DATES: Effective July 19, 1995.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of July 19, 1995.
ADDRESSES: Service information that applies to this AD may be obtained
from Jetstream Aircraft Limited, Manager Product Support, Prestwick
Airport, Ayrshire, KA9 2RW Scotland; telephone (44-292) 79888;
facsimile (44-292) 79703; or Jetstream Aircraft Inc., Librarian, P.O.
Box 16029, Dulles International Airport, Washington, DC 20041-6029;
telephone (703) 406-1161; facsimile (703) 406-1469. This information
may also be examined at the FAA, Central Region, Office of the
Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City,
Missouri 64106; or at the Office of the Federal Register, 800 North
Capitol Street, NW., suite 700, Washington, DC.
FOR FURTHER INFORMATION CONTACT: Mr. Raymond A. Stoer, Program Officer,
Brussels Aircraft Certification Office, FAA, Europe, Africa, and Middle
East Office, c/o American Embassy, B-1000 Brussels, Belgium; telephone
(322) 513.3830; facsimile (322) 230.6899; or Mr. Sam Lovell, Project
Officer, Small Airplane Directorate, Airplane Certification Service,
FAA, 1201 Walnut, suite 900, Kansas City, Missouri 64106; telephone
(816) 426-6934; facsimile (816) 426-2169.
SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal
Aviation Regulations (14 CFR part 39) to include an AD that would apply
to certain JAL Models 3101 and 3201 airplanes was published in the
Federal Register on February 10, 1995 (60 FR 7922). The action proposed
to supersede AD 90-13-12 with a new AD that would (1) retain the
requirements of modifying [[Page 28530]] the airplane electrical system
and revising the emergency procedures section of the AFM required by AD
90-13-12; and (2) require these modification and revisions only for
those airplanes that do not have modified inverters, P/N 1B350-1B1-3,
installed in accordance with the instructions in Jetstream Service
Bulletin (SB) 24-JM 7740, dated November 15, 1990, and do not have the
inverter transfer function restored in accordance with the instructions
in Jetstream SB 24-JA 900941, dated November 14, 1990; or Jetstream SB
24-JA 900941, Revision 1, dated February 18, 1992. Accomplishment of
the proposed airplane electrical modifications would be in accordance
with Jetstream Alert Service Bulletin (ASB) 24-A-JA 900443, Revision 1,
dated May 1, 1990; and Jetstream ASB 24-A-JM 7708, Revision 1, dated
May 22, 1990.
Interested persons have been afforded an opportunity to participate
in the making of this amendment. No comments were received on the
proposed rule or the FAA's determination of the cost to the public.
After careful review of all available information related to the
subject presented above, the FAA has determined that air safety and the
public interest require the adoption of the rule as proposed except for
minor editorial corrections. The FAA has determined that these minor
corrections will not change the meaning of the AD and will not add any
additional burden upon the public than was already proposed.
The FAA estimates that 180 airplanes in the U.S. registry will be
affected by this AD, that it will take approximately 10 workhours per
airplane to accomplish the required action, and that the average labor
rate is approximately $60 an hour. Based on these figures, the total
cost impact of this AD on U.S. operators is estimated to be $108,000.
This figure is based on the assumption that no affected owner/operator
has accomplished the required modification.
Since AD 90-13-12, which this AD supersedes, requires the same
actions (except for a limit in the airplane applicability), there is no
additional cost of this AD on U.S. operators. The $28,800 cost
difference between this AD (estimated $108,000) and superseded AD 90-
04-04 (estimated $79,200) is a result of inflationary costs used in
determining the costs of labor ($60 per hour as opposed to $40 per
hour).
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 copy of the final evaluation prepared for this
action is contained in the Rules Docket. A copy of it may be obtained
by contacting 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. App. 1354(a), 1421 and 1423; 49 U.S.C.
106(g); and 14 CFR 11.89.
Sec. 39.13 [Amended]
2. Section 39.13 is amended by removing AD 90-13-12, Amendment 39-
6629 (55 FR 23890, June 13, 1990), and adding a new AD to read as
follows:
95-11-17 Jetstream Aircraft Limited: Amendment 39-9250; Docket No.
90-CE-67-AD. Supersedes AD 90-13-12, Amendment 39-6629.
Applicability: Jetstream Models 3101 and 3201 airplanes (serial
numbers 697 through 904), certificated in any category, that do not
have the following:
1. Two modified inverters, part number (P/N) 1B350-1B1-3,
installed in accordance with the instructions in Jetstream Service
Bulletin (SB) 24-JM 7740, dated November 15, 1990; and
2. The inverter transfer function restored in accordance with
the instructions in Jetstream SB 24-JA 900941, dated November 14,
1990; or Jetstream SB 24-JA 900941, Revision 1, dated February 18,
1992.
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 (e) 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 already accomplished
(compliance with superseded AD 90-13-12).
To prevent alternating current system failures, which, if not
detected and corrected, could result in damage to the airplane
navigational systems, accomplish the following:
(a) Within the next 50 hours time-in-service (TIS) after the
effective date of this AD, modify the airplane electrical system and
revise the emergency procedures section of the airplane flight
manual in accordance with the instructions in Jetstream Alert
Service Bulletin (ASB) 24-A-JA 900443, Revision 2, dated November
15, 1990, Section 2, ACCOMPLISHMENT INSTRUCTIONS; and APPENDIX C.
(b) Within the next 100 hours TIS after the effective date of
this AD, modify the airplane electrical system in accordance with
the instructions in Jetstream ASB 24-A-JM 7708, Revision 1, dated
May 22, 1990, and revise the emergency procedures section of the
airplane flight manual in accordance with the instructions in
Jetstream ASB 24-A-JA 900443, Revision 2, dated November 15, 1990,
APPENDIX C; or the following Advance Amendment Bulletins (AAB), as
applicable:
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Model Publication
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3101.... AFM HP.4.10, Jetstream AAB number 6 with at least issue 1
status; and AFM HP.4.10, Jetstream AAB number 4 with at least
issue 2 status.
3201.... AFM HP.4.16, Jetstream AAB number 2 with at least issue 2
status, and removal of Jetstream AAB number 2, issue 1.
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Note 2: Compliance with a previous revision level of the service
information referenced in this AD fulfills the applicable
requirements of this AD and is considered ``unless already
accomplished'' for that portion of the AD.
(c) Replacement of both inverters, P/N 1B350-1B1-2, with
modified inverters P/N [[Page 28531]] 1B350-1B1-3 in accordance with
the ``ACCOMPLISHMENT INSTRUCTIONS'' section of Jetstream SB 24-JM
7740, dated November 15, 1990, and restoration of the inverter
transfer function in accordance with Jetstream ASB 24-JA 900941,
dated November 14, 1990; or Jetstream ASB 24-JA 900941, Revision 1,
dated February 18, 1992, is considered terminating action for the
requirements of this AD.
(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) An alternative method of compliance or adjustment of the
compliance times that provides an equivalent level of safety may be
approved by the Manager, Brussels Aircraft Certification Office ACO,
FAA, Europe, Africa, and Middle East Office, c/o American Embassy,
B-1000 Brussels, Belgium. The request should be forwarded through an
appropriate FAA Maintenance Inspector, who may add comments and then
send it to the Manager, Brussels ACO.
Note 3: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Brussels ACO.
(f) The modifications required by this AD shall be done in
accordance with Jetstream Alert Service Bulletin 24-A-JA 900443,
Revision 2, dated November 15, 1990, and Jetstream Alert Service
Bulletin 24-A-JM 7708, Revision 1, dated May 22, 1990. 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 Limited, Manager
Product Support, Prestwick Airport, Ayrshire, KA9 2RW Scotland; or
Jetstream Aircraft Inc., Librarian, P.O. Box 16029, Dulles
International Airport, Washington, DC, 20041-6029. Copies may be
inspected at the FAA, Central Region, Office of the Assistant Chief
Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at
the Office of the Federal Register, 800 North Capitol Street, NW.,
suite 700, Washington, DC.
(g) This amendment (39-9250) supersedes AD 90-13-12, Amendment
39-6629.
(h) This amendment (39-9250) becomes effective on July 19 1995.
Issued in Kansas City, Missouri, on May 23, 1995.
Henry A. Armstrong,
Acting Manager, Small Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 95-13120 Filed 5-31-95; 8:45 am]
BILLING CODE 4910-13-U
