[Federal Register Volume 60, Number 141 (Monday, July 24, 1995)]
[Rules and Regulations]
[Pages 37820-37821]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-17708]



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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 94-NM-189-AD; Amendment 39-9313; AD 95-15-10]


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 if a travel stop (screw) is installed at the 
flight control assembly, and various follow-on actions. This amendment 
is prompted by a report of failure of the travel stop, which allowed 
the elevator and aileron disconnect handles to rotate within the 
housing due to migration of the travel stop from its position. The 
actions specified by this AD are intended to prevent such migration, 
which could result in the elevator and aileron disconnect system 
resetting without the use of the reset button; this condition could 
lead to jamming of the disconnect handles.

DATES: Effective August 23, 1995.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of August 23, 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 4101 
airplanes was published in the Federal Register on February 17, 1995 
(60 FR 9304). That action proposed to require an inspection to 
determine if a travel stop (screw) is installed at the flight control 
assembly, and various follow-on actions.
    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, but requests that the FAA 
consider the final rule to be interim action. This commenter states 
that the FAA should continue to investigate and determine the cause of 
the migration of the screw. The FAA concurs. The FAA inadvertently 
omitted indication that this rule is considered to be interim action 
until final action is identified, at which time the FAA may consider 
further rulemaking.
    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 with the change previously 
described. The FAA has determined that this change will neither 
increase the economic burden on any operator nor increase the scope of 
the AD.
    The FAA estimates that 14 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 4 work hours per 
airplane to accomplish the required actions, and that the average labor 
rate is $60 per work hour. Required parts will be supplied by the 
manufacturer at no cost to the operators. Based on these figures, the 
total cost impact of the AD on U.S. operators is estimated to be 
$3,360, or $240 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 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 adding the following new 
airworthiness directive:

95-15-10 Jetstream Aircraft Limited: Amendment 39-9313. Docket 94-
NM-189-AD.

    Applicability: Model 4101 airplanes, constructors numbers 41004 
through 41039 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 

[[Page 37821]]
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 jamming of the elevator and aileron disconnect 
handles, accomplish the following:
    (a) Within 600 flight hours after the effective date of this AD, 
or within 6 months after the effective date of this AD, whichever 
occurs first, perform an inspection to determine if a travel stop 
(screw) is installed at the flight control assembly, in accordance 
with Jetstream Service Bulletin J41-27-036, dated September 2, 1994.
    (1) If no travel stop is found to be installed, prior to further 
flight, install a new travel stop in accordance with the service 
bulletin. After installation, accomplish paragraph (a)(2) of this 
AD.
    (2) If such a travel stop is installed, prior to further flight, 
perform a rotation to determine the security of the travel stop, in 
accordance with the service bulletin.
    (i) If the travel stop is found to be properly secured, no 
further action is required by paragraph (a) of this AD.
    (ii) If the travel stop is found to be loose, prior to further 
flight, remove it and perform an inspection to detect damage in 
accordance with the service bulletin. If any damage is found, 
replace the travel stop with a new travel stop, in accordance with 
the service bulletin. After replacement, repeat the requirements of 
paragraph (a)(2) of this AD.
    (b) After accomplishment of paragraph (a) of this AD, prior to 
further flight, accomplish paragraphs (b)(1), (b)(2), and (b)(3) of 
this AD, in accordance with Jetstream Service Bulletin J41-27-036, 
dated September 2, 1994.
    (1) Apply Loctite Superfast 290 to the travel stop;
    (2) Permanently mark the flight control assembly; and
    (3) Perform a functional test of the aileron and elevator 
disconnect systems and set them to the locked position.

    Note 2: Procedures for installing a protective spiral wrap cover 
are contained in Jetstream Service Bulletin J41-27-036, dated 
September 2, 1994. This installation is recommended, but is not 
required by 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 3: 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 J41-27-036, dated September 2, 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 August 23, 1995.
    Issued in Renton, Washington, on July 13, 1995.
James V. Devany,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 95-17708 Filed 7-21-95; 8:45 am]
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