95-18712. Airworthiness Directives; Jetstream Aircraft Limited HP137 Mk1 and Jetstream Series 200 Airplanes  

  • [Federal Register Volume 60, Number 148 (Wednesday, August 2, 1995)]
    [Rules and Regulations]
    [Pages 39243-39245]
    From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
    [FR Doc No: 95-18712]
    
    
    
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    DEPARTMENT OF TRANSPORTATION
    
    Federal Aviation Administration
    
    14 CFR Part 39
    
    [Docket No. 95-CE-09-AD; Amendment 39-9326; AD 95-16-06]
    
    
    Airworthiness Directives; Jetstream Aircraft Limited HP137 Mk1 
    and Jetstream Series 200 Airplanes
    
    AGENCY: Federal Aviation Administration, DOT.
    
    ACTION: Final rule
    
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    SUMMARY: This amendment supersedes Airworthiness Directive (AD) 83-05-
    01, which currently requires the following on Jetstream Aircraft 
    Limited (JAL) HP137 Mk1 and Jetstream series 200 airplanes: 
    repetitively inspecting the wing lower skin panels at the main gear bay 
    cutouts for loose or damaged rivets and cracks, replacing loose or 
    damaged rivets, and repairing any cracked wing lower skin panel. The 
    Federal Aviation Administration's policy on commuter-class aircraft is 
    to eliminate or, in certain instances, reduce the number of certain 
    repetitive short-interval inspections when improved parts or 
    modifications are available. The proposed action would require 
    reinforcing the wing lower skin at both the landing gear cutouts at 
    Wing Station (WS) 115 and the undercarriage bay cutouts at WS 60 and WS 
    90, as terminating action for the repetitive inspections that are 
    currently required by AD 83-05-01. The actions specified in the 
    proposed AD are intended to prevent wing damage caused by cracks or 
    loose or damaged rivets in the wing lower skin panels, which, if not 
    detected and corrected, could result in structural damage to the point 
    of failure.
    
    DATES: Effective September 26, 1995.
        The incorporation by reference of certain publications listed in 
    the regulations is approved by the Director of the Federal Register as 
    of September 26, 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., 
    
    [[Page 39244]]
    Librarian, P.O. Box 16029, Dulles International Airport, Washington, 
    D.C. 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 95-CE-09-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. Marvin R. Nuss, 
    Project Officer, Small Airplane Directorate, Airplane Certification 
    Service, FAA, 1201 Walnut, suite 900, Kansas City, Missouri 64105; 
    telephone (816) 426-6932; 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 JAL HP137 Mk1 and Jetstream series 200 airplanes was published in 
    the Federal Register on March 2, 1995 (60 FR 11637). The action 
    proposed to supersede AD 83-05-01 with a new AD that would (1) retain 
    the requirements of repetitively inspecting the wing lower skin panels 
    at the main gear bay cutouts for loose or damaged rivets and cracks, 
    replacing loose or damaged rivets, and repairing any cracked wing lower 
    skin panel; and (2) require reinforcing the wing lower skin 
    (incorporation of Modifications Nos. 5221 and 5146) as terminating 
    action for the repetitive inspections. The proposed inspection would be 
    accomplished in accordance with Jetstream Service Bulletin (SB) No. 7/
    3, dated October 1980. Modification 5221 would be accomplished in 
    accordance with Jetstream SB 57-JM5221, dated September 28, 1984, and 
    Modification 5146 would be accomplished in accordance with Part 2 of 
    Modification No. 5146 Ref 7/5146, dated October 1984.
        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 this AD and will not add any 
    additional burden upon the public than was already proposed.
        The FAA estimates that 10 airplanes in the U.S. registry will be 
    affected by this AD, that it will take approximately 332 work hours per 
    airplane to accomplish the required modifications (172 work hours for 
    Modification 5221 and 160 work hours for Modification 5146), and that 
    the average labor rate is approximately $60 an hour. Parts cost 
    approximately $12,000 per airplane ($2,400 for Modification 5221 and 
    $9,600 for Modification 5146). Based on these figures, the total cost 
    impact of this AD on U.S. operators is estimated to be $319,200 
    ($31,920 per airplane).
        All 10 of the affected airplanes are HP137 Mk1 airplanes; there are 
    no Jetstream series 200 airplanes registered in the United States, but 
    they are type certificated for operation in the United States. 
    According to FAA records, none of these HP137 Mk1 airplanes are in 
    operation. JAL no longer stocks Modification No. 5221, but can develop 
    modification kits within three months after order. Since there are no 
    airplanes currently in operation, the cost impact of this AD is 
    narrowed to only those owners/operators returning their airplane to 
    operation.
        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. 106(g), 40101, 40113, 44701.
    
    
    Sec. 39.13  [Amended]
    
        2. Section 39.13 is amended by removing AD 83-05-01, Amendment 39-
    4573, and adding a new AD to read as follows:
    
    95-16-06.  Jetstream Aircraft Limited: Amendment 39-9326; Docket No. 
    95-CE-09-AD; Supersedes AD 83-05-01, Amendment 39-4573;
    
        Applicability: HP137 Mk1 and Jetstream series 200 airplanes (all 
    serial numbers), 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 as indicated after the effective date of 
    this AD, unless already accomplished.
        To prevent wing damage caused by cracks or loose or damaged 
    rivets in the wing lower skin panels, which, if not detected and 
    corrected, could result in structural damage to the point of 
    failure, accomplish the following:
        (a) Upon the accumulation of 6,500 hours time-in-service (TIS) 
    or within the next 100 hours TIS after the effective date of this 
    AD, whichever occurs later, unless already accomplished (compliance 
    with superseded AD 83-05-01), and thereafter at intervals not to 
    exceed 100 hours TIS until the modifications required by paragraphs 
    (b)(1) and (b)(2) of this AD are incorporated, accomplish the 
    following:
        (1) Inspect the wing lower skin between Wing Station (WS) 60 and 
    WS 115 for loose or damaged rivets or cracks in accordance with 
    section 3. ACTION, paragraphs (a) 
    
    [[Page 39245]]
    through (e), of Jetstream Service Bulletin (SB) No. 7/3, dated October 
    1980.
        (2) Replace any loose or damaged rivets and repair any cracked 
    wing lower skin panel in accordance with section 3. ACTION, 
    paragraphs (f) through (k), of Jetstream SB No. 7/3, dated October 
    1980.
        (b) Upon the accumulation of 10,000 hours TIS or within the next 
    100 hours TIS after the effective date of this AD, whichever occurs 
    later, accomplish the following:
        (1) Reinforce the wing lower skin at the landing gear bay 
    cutouts at WS 115 in accordance with Jetstream SB 57-JM5221, dated 
    September 28, 1984. This is referred to as Modification 5221.
        (2) Reinforce the wing lower skin at undercarriage bay cutouts 
    between WS 60 and WS 90 in accordance with Part 2 of Modification 
    No. 5146 Ref. 7/5146, dated October 1984.
        (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 
    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 shall 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 Aircraft Certification Office.
    
        (e) The inspections and replacements required by this AD shall 
    be done in accordance with Jetstream Service Bulletin No. 7/3, dated 
    October 1980. The reinforcements required by this AD shall be done 
    in accordance with Jetstream Service Bulletin 57-JM5221, dated 
    September 28, 1984, or Modification No. 5146 Ref. 7/5146, dated 
    October 1984, as applicable. 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; telephone (44-292) 79888; 
    facsimile (44-292) 79703; or Jetstream Aircraft Inc., Librarian, 
    P.O. Box 16029, Dulles International Airport, Washington, D.C. 
    20041-6029; telephone (703) 406-1161; facsimile (703) 406-1469. 
    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 (39-9326) supersedes AD 83-05-01, Amendment 
    39-4573.
        (g) This amendment (39-9326) becomes effective on September 26, 
    1995.
    
        Issued in Kansas City, Missouri, on July 24, 1995.
    Henry A. Armstrong,
    Acting Manager, Small Airplane Directorate, Aircraft Certification 
    Service.
    [FR Doc. 95-18712 Filed 8-1-95; 8:45 am]
    BILLING CODE 4910-13-U
    
    

Document Information

Effective Date:
9/26/1995
Published:
08/02/1995
Department:
Federal Aviation Administration
Entry Type:
Rule
Action:
Final rule
Document Number:
95-18712
Dates:
Effective September 26, 1995.
Pages:
39243-39245 (3 pages)
Docket Numbers:
Docket No. 95-CE-09-AD, Amendment 39-9326, AD 95-16-06
PDF File:
95-18712.pdf
CFR: (1)
14 CFR 39.13