AD Amdt-39-9340

[Federal Register Volume 60, Number 163 (Wednesday, August 23, 1995)]
[Rules and Regulations]
[Pages 43707-43708]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 95-20277]



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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 91-CE-85-AD; Amendment   39-9340; AD 95-17-10]


Airworthiness Directives; Jetstream Aircraft Limited Jetstream 
Models 3101 and 3201 Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment adopts a new airworthiness directive (AD) that 
applies to certain Jetstream Aircraft Limited (JAL) Jetstream Models 
3101 and 3201 airplanes. This action requires modifying the central 
annunciator panel test button circuit. A report of diode failure in 
this circuit and subsequent inadvertent engine shutdown on one of the 
affected airplanes prompted this action. The actions specified by this 
AD are intended to prevent failure of a diode in the central 
annunciator panel test button circuit, which could result in 
inadvertent engine shutdown while in flight if the central annunciator 
panel test button is pressed.

DATES: Effective October 3, 1995.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of October 3, 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 Federal Aviation Administration (FAA), 
Central Region, Office of the Assistant Chief Counsel, Attention: Rules 
Docket 91-CE-85-AD, 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 Jetstream Models 3101 and 3201 airplanes was published 
in the Federal Register on April 11, 1995 (60 FR 18376). The action 
proposed to require modifying the central annunciator panel test button 
circuit by removing diodes from the engine stop circuit and configuring 
a minor wiring change. Accomplishment of the proposed actions would be 
in accordance with Jetstream Alert Service Bulletin 80-A-JA 911045, 
Revision 1, dated November 1, 1991.
    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 260 airplanes in the U.S. registry will be 
affected by this AD, that it will take approximately 2 workhours per 
airplane to accomplish the required modification, and that the average 
labor rate is approximately $60 an hour. JAL will provide parts at no 
cost to the owner/operator. Based on these figures, the total cost 
impact of this AD on U.S. operators is estimated to be $31,200. This 
figure is based on the assumption that no affected owner/operator has 
incorporated the required modification.
    JAL has informed the FAA that 2 modification kits have been 
distributed to affected airplane owners/operators. Assuming that each 
of these modification kits has been incorporated on an affected 
airplane, then the cost impact upon U.S. operators would be reduced 
$240 (2 workhours  x  $60 per hour  x  2 airplanes) from $31,200 to 
$30,960. The FAA also believes that numerous owners/operators of the 
affected airplanes have accomplished the modification using 22AWA cable 
and terminal tags instead of obtaining parts from the manufacturer, as 
is provided for in this AD. This would further reduce the cost impact 
of the AD upon U.S. operators of the affected airplanes. The FAA has no 
way of determining how many airplanes have accomplished the required 
modification utilizing the 22AWA cable and terminal tags alternative.
    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 USC 106(g), 40101, 40113, 44701. 

[[Page 43708]]



Sec. 39.13  [Amended]

    2. Section 39.13 is amended by adding a new airworthiness directive 
to read as follows:

95-17-10  Jetstream Aircraft Limited: Amendment 39-9340; Docket No. 
91-CE-85-AD.

    Applicability: Jetstream Model 3101 airplanes, all serial 
numbers, and Jetstream Model 3201 airplanes, serial numbers 790 
through 950, 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 (d) 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 within the next 200 hours time-in-service 
after the effective date of this AD, unless already accomplished.
    To prevent failure of a diode in the central annunciator panel 
test button circuit, which could result in inadvertent engine 
shutdown while in flight if the central annunciator panel test 
button is pressed, accomplish the following:
    (a) Modify the central annunciator panel test button circuit 
(Amendment JA 911045) by removing diodes from the engine stop 
circuit and configuring a minor wiring change in accordance with 
PART 2 of the ACCOMPLISHMENT INSTRUCTIONS section of Jetstream Alert 
Service Bulletin 80-A-JA 911045, Revision 1, dated November 1, 1991.
    (b) As noted in Jetstream Alert Service Bulletin 80-A-JA 911045, 
Revision 1, dated November 1, 1991, terminals may be linked using 22 
AWA cable and terminal tags, provided the following is accomplished:
    (1) For airplanes without roof panel plug breaks, identify the 
cables as WQ69 and WQ70.
    (2) For airplanes with roof panel plug breaks, identify the 
cables as WQ71 and WQ72.
    (c) 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.
    (d) An alternative method of compliance or adjustment of the 
compliance time that provides an equivalent level of safety may be 
approved by the Manager, Brussels Aircraft Certification Office 
(ACO), Europe, Africa, Middle East office, FAA, 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 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Brussels ACO.

    (e) The modification required by this AD shall be done in 
accordance with Jetstream Alert Service Bulletin 80-A-JA 911045, 
Revision 1, dated November 1, 1991. 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., 7th Floor, suite 700, 
Washington, DC.

    (f) This amendment (39-9340) becomes effective on October 3, 
1995. Issued in Kansas City, Missouri, on August 10, 1995.

Gerald W. Pierce,

Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.

[FR Doc. 95-20277 Filed 8-22-95; 8:45 am]

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