[Federal Register Volume 59, Number 44 (Monday, March 7, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-3753]


[[Page Unknown]]

[Federal Register: March 7, 1994]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 93-NM-28-AD; Amendment 39-8830; AD 94-04-10]

 

Airworthiness Directives; Fokker Model F28 Mark 0100 Series 
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 Fokker Model F28 Mark 0100 series airplanes, that 
requires replacement of the bottom joint fittings and modification of 
these new bottom joint fittings, the main landing gear (MLG) rear spar 
fittings, and the rear spar webs by cold-expanding the bolt holes. This 
amendment is prompted by full-scale fatigue testing of a Fokker Model 
F28 Mark 0100 series airplane, which revealed cracks in the MLG rear 
spar fitting. The actions specified by this AD are intended to prevent 
loss of the structural integrity of the MLG attachments.

DATES: Effective April 6, 1994.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of April 6, 1994.

ADDRESSES: The service information referenced in this AD may be 
obtained from Fokker Aircraft USA, Inc., 1199 North Fairfax Street, 
Alexandria, Virginia 22314. 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:
Tim Dulin, Aerospace Engineer, Standardization Branch, ANM-113, FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington 98055-4056; telephone (206) 227-2141; fax (206) 227-1320.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations to include an airworthiness directive (AD) that is 
applicable to certain Fokker Model F28 Mark 0100 series airplanes was 
published in the Federal Register on August 3, 1993 (58 FR 41210). (A 
correction of the rule was published in the Federal Register August 9, 
1993 (58 FR 42361).) That action proposed to require replacement of the 
bottom joint fittings and modification of these new bottom joint 
fittings, the MLG rear spar fittings, and the rear spar webs by cold-
expanding the bolt holes.
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. Due consideration has been given to 
the comments received.
    One commenter supports the rules as proposed.
    The Air Transport Association (ATA), on behalf of one of its 
members, requests that paragraph (a) of the proposed AD be revised to 
include Fokker Service Bulletin Change Notification (SBCN) SBF100-57-
020/01, dated February 4, 1993, as an additional source of service 
information. This commenter states that, since one operator has already 
begun the proposed modification, that operator would have to request an 
alternative method of compliance if the SBCN is not incorporated into 
the final rule. The FAA concurs. This SBCN makes certain minor 
corrections and clarifications to Fokker Service Bulletin SBF100-57-
020, dated April 27, 1992. Therefore, paragraph (a) of the final rule 
has been revised to include this SBCN as an additional source of 
appropriate service information.
    After careful review of the available data, including the comments 
noted above, the FAA has determined that air safety and the public 
interest required 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 52 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 27 work hours per 
airplane to accomplish the required actions, and that the average labor 
rate is $55 per work hour. Required parts will cost approximately 
$2,100 per airplane. Based on these figures, the total cost impact of 
the AD on U.S. operators is estimated to be $186,420, or $3,585 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 14 CFR part 
39 of the Federal Aviation Regulations 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:

94-04-10 Fokker: Amendment 39-8830. Docket 93-NM-28-AD.

    Applicability: Model F28 Mark 0100 series airplanes; serial 
numbers 11244 through 11390 inclusive; certificated in any category.
    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent loss of the structural integrity of the main landing 
gear (MLG) attachments, accomplish the following:
    (a) Prior to the accumulation of 13,500 total landings, or 
within one year after the effective date of this AD, whichever 
occurs later, replace the bottom joint fittings and modify these new 
bottom joint fittings, the MLG rear spar fittings, and the rear spar 
webs by cold-expanding the bolt holes in accordance with Fokker 
Service Bulletin SBF100-57-020, dated April 27, 1992, as revised by 
Fokker Service Bulletin Change Notification (SBCN) SBF100-57-020/01, 
dated February 4, 1993, and SBCN SBF100-57-020/02, dated April 20, 
1993.
    (b) 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: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Standardization Branch, ANM-113.

    (c) Special flight permits may be issued in accordance with 
Federal Aviation Regulations (FAR) 21.197 and 21.199 to operate the 
airplane to a location where the requirements of this AD can be 
accomplished.
    (d) The replacement and modification shall be done in accordance 
with Fokker Service Bulletin SBF100-57-020, dated April 27, 1992, as 
revised by Fokker Service Bulletin Change Notification SBF100-57-
020/01, dated February 4, 1993, and Fokker Service Bulletin Change 
Notification SBF100-57-020/02, dated April 20, 1993. 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 Fokker Aircraft USA, Inc. 1199 North 
Fairfax Street, Alexandria, Virginia 22314. 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.
    (e) This amendment becomes effective on April 6, 1994.

    Issued in Renton, Washington, on February 14, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-3753 Filed 3-4-94; 8:45 am]
BILLING CODE 4910-13-M