[Federal Register Volume 60, Number 116 (Friday, June 16, 1995)]
[Rules and Regulations]
[Pages 31626-31628]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-14166]



-----------------------------------------------------------------------


DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 94-NM-250-AD; Amendment 39-9269; AD 95-12-18]


Airworthiness Directives; Fokker Model F28 Mark 0100 Series 
Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: This amendment adopts a new airworthiness directive (AD), 
applicable to certain Fokker Model F28 Mark 0100 series airplanes, that 
requires a visual inspection to verify proper clearance between the 
engine fuel supply-line and the hydraulic line in certain areas, and 
replacement of damaged fuel lines. This amendment would also require 
installation of additional clamps on the out line of the lift-dumper in 
certain cases. This amendment is prompted by a report indicating that 
fuel was found leaking from the right-hand wheel bay on one airplane 
due to chafing of the fuel supply line. The actions specified by this 
AD are intended to prevent such chafing, which could result in fuel 
leakage, and, subsequently, lead to a possible fire hazard and engine 
fuel depravation.

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) 227-1320.

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 January 17, 
1995 (60 FR 3358). That action proposed to require a one-time visual 
inspection to verify proper 

[[Page 31627]]
clearance between the engine fuel supply-line and the hydraulic line in 
zones 631 and 531. It also proposed to require an inspection to detect 
damage of fuel lines, and replacement of damaged fuel lines. That 
action also proposed to require installation of two additional clamps 
on the out line of the lift-dumper in cases where clearance is less 
than 3mm (0.118 inch) and no damage is detected on the fuel lines.
    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 proposed rule.
    One commenter requests that the FAA revise paragraphs (a)(3) and 
(a)(4) of the proposed rule to remove the phrase ``in accordance with 
the service bulletin.'' The commenter recommends describing the 
clamping procedures in general terms, such as ``addition of clamps as 
required to provide the prerequisite clearance,'' instead of mandating 
that these procedures be accomplished in accordance with a specific 
service document. The FAA does not concur. The FAA has determined that 
the commenter's request to require ``addition of clamps * * *'' is too 
vague to provide adequate guidance as to what is required of operators, 
and for the FAA to perform proper surveillance of these operators to 
ensure that the objectives of the AD are being fulfilled. Under 
provisions of paragraph (b) of the final rule, however, operators may 
apply for approval of an alternative method of compliance, such as 
different clamping procedures.
    After careful review of the available data, including the comments 
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 83 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 1 work hour per 
airplane to accomplish the required actions, and that the average labor 
rate is $60 per work hour. Based on these figures, the total cost 
impact of the AD on U.S. operators is estimated to be $4,980, or $60 
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:

95-12-18  Fokker: Amendment 39-9269. Docket 94-NM-250-AD.

    Applicability: Model F28 Mark 0100 series airplanes, serial 
numbers 11244 through 11438 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 (b) 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 prevent chafing of the fuel supply line, which could result 
in fuel leakage, and, subsequently, lead to a possible fire hazard 
and engine fuel depravation, accomplish the following:
    (a) Within 30 days after the effective date of this AD, perform 
a visual inspection to verify proper clearance between the engine 
fuel supply-line and the hydraulic line in zones 631 and 531 and to 
detect damage of the fuel supply-line, in accordance with Fokker 
Service Bulletin SBF100-28-026, dated March 12, 1993.
    (1) If the clearance is found to be 3mm (0.118 inch) or more and 
no damage is found, no further action is required by this AD.
    (2) If the clearance is found to be 3mm or more and damage is 
found, prior to further flight, replace the damaged fuel line in 
accordance with the service bulletin.
    (3) If the clearance is found to be less than 3mm and no damage 
is found, within 6 months after the effective date of this AD, 
install 2 additional clamps on the out line of the lift-dumper, in 
accordance with the service bulletin.
    (4) If the clearance is found to be less than 3mm and damage is 
found, prior to further flight, replace the damaged fuel line, and 
install 2 additional clamps on the out line of the lift-dumper, in 
accordance with the service bulletin.
    (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 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.

    (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) The inspection, replacement, and installation shall be done 
in accordance with Fokker Service Bulletin SBF100-28-026, dated 
March 12, 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 

[[Page 31628]]
Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
    (e) This amendment becomes effective on July 17, 1995.

    Issued in Renton, Washington, on June 5, 1995.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 95-14166 Filed 6-15-95; 8:45 am]
BILLING CODE 4910-13-U