[Federal Register Volume 60, Number 116 (Friday, June 16, 1995)]
[Rules and Regulations]
[Pages 31629-31630]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-14052]



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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 95-NM-05-AD; Amendment 39-9264; AD 95-12-14]


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 an inspection to determine the adequacy of clearance between 
the normal maximum (second) detent for the reverse thrust control and 
the surrounding moving parts, and to detect chafing or damage of the 
detent. This amendment also requires eventual replacement of the normal 
maximum detent with an improved detent. This amendment is prompted by a 
report indicating that an inadequate level of clearance between the 
normal maximum detent and the surrounding parts may exist on earlier 
production Model F28 Mark 0100 series airplanes. The actions specified 
by this AD are intended to ensure proper operation of the normal 
maximum detent for reverse thrust control.

DATES: Effective July 17, 1995.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of July 17, 1995.

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) 227-1149.

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 Fokker Model F28 Mark 0100 
series airplanes was published in the Federal Register on March 3, 1995 
(60 FR 11945). That action proposed to require a one-time inspection to 
determine the adequacy of clearance between the normal maximum detent 
for the reverse thrust control and the surrounding moving parts, and to 
detect chafing or damage of the normal maximum detent. It also proposed 
to require the eventual replacement of the normal maximum detent with a 
new normal maximum detent.
    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.
    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 as proposed.
    The FAA estimates that 5 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 10 work hours per 
airplane to accomplish the required actions, and that the average labor 
rate is $60 per work hour. Required parts will cost approximately $400 
per airplane. Based on these figures, the total cost impact of the AD 
on U.S. operators is estimated to be $5,000, or $1,000 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:


[[Page 31630]]

    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:

95-12-14  Fokker: Amendment 39-9264. Docket 95-NM-05-AD.

    Applicability: Model F28 Mark 0100 series airplanes; having 
serial numbers 11244 through 11261 inclusive, 11263, and 11268 
through 11283 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) 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 accomplished 
previously.
    To ensure proper operation of the normal maximum detent for 
reverse thrust control, accomplish the following:
    (a) For airplanes on which Fokker Service Bulletin SBF100-76-
008, dated May 8, 1991, has been accomplished: Within 1,500 flight 
cycles after the effective date of this AD, perform an inspection to 
determine the adequacy of clearance between the normal maximum 
(second) detent for the reverse thrust control and the surrounding 
moving parts and to detect chafing or damage of the normal maximum 
detent, in accordance with Part 1 of the Accomplishment Instructions 
of Fokker Service Bulletin SBF100-76-010, dated October 31, 1993.
    (1) If any chafing or damage is found (regardless of clearance), 
prior to further flight, replace the normal maximum detent with an 
improved normal maximum detent, in accordance with Part 2 of the 
Accomplishment Instructions of the service bulletin.
    (2) If the clearance is found to be inadequate, but no chafing 
or damage is found, within 250 flight cycles following the 
inspection required by paragraph (a) of this AD, replace the normal 
maximum detent with an improved normal maximum detent, in accordance 
with Part 2 of the Accomplishment Instructions of the service 
bulletin.
    (3) If the clearance is found to be adequate and no damage or 
chafing is found, within 3,000 flight cycles following the 
inspection required by pararaph (a) of this AD, replace the detent 
with an improved normal maximum detent, in accordance with Part 2 of 
the Accomplishment Instructions of the service bulletin.
    (b) For airplanes on which Fokker Service Bulletin SBF100-76-
008, dated May 8, 1991, has not been accomplished: Within the next 
500 flight cycles after the effective date of this AD, replace the 
normal maximum detent for reverse thrust control with an improved 
normal maximum detent, in accordance with Part 2 of the 
Accomplishment Instructions of Fokker Service Bulletin SBF100-76-
010, dated October 31, 1993.
    (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 2: 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 inspection and replacement shall be done in accordance 
with Fokker Service Bulletin SBF100-76-010, dated October 31, 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.
    (f) This amendment becomes effective on July 17, 1995.

    Issued in Renton, Washington, on June 2, 1995.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 95-14052 Filed 6-15-95; 8:45 am]
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