[Federal Register Volume 59, Number 33 (Thursday, February 17, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-3236]


[[Page Unknown]]

[Federal Register: February 17, 1994]


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


DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 93-NM-107-AD; Amendment 39-8824; AD 94-04-06]

 

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 replacement of the existing ground/flight microswitches 
located in the main landing gear with improved microswitches, and 
installation of an anti-skid system ON/OFF switch in the flight 
compartment. This amendment is prompted by an incident involving loss 
of braking, which was caused by mechanical ground/flight microswitches 
that froze while in the flight position. The actions specified by this 
AD are intended to prevent loss of braking below 40 miles per hour, 
when the anti-skid system is activated.

DATES: Effective March 21, 1994.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of March 21, 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: Timothy 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 September 1, 1993 (58 FR 46139). 
That action proposed to require replacement of the existing left- and 
right-hand ground/flight microswitches with new, improved microswitches 
at the MLG downlock, temperature sensor, and anti-skid harness 
positions. The proposed rule would also require installation of an 
anti-skid system ON/OFF switch in the flight compartment, for certain 
airplanes.
    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.
    The Air Transport Association (ATA) of America, on behalf of one of 
its members, requests withdrawal of the proposal. The commenter notes 
that the proposed replacement and installation has already been 
accomplished on all 14 airplanes affected by this proposal in the U.S.-
registered fleet. Therefore, the commenter does not believe that an AD 
is necessary. The commenter also asserts that issuance of the proposal 
would only add to an administrative paperwork burden. The FAA does not 
agree. Issuance of this AD is necessary to ensure accomplishment of the 
requirements on any affected airplane currently of foreign registry 
that is purchased by a U.S. operator and placed on the U.S. register in 
the future. The FAA has determined that issuance of this AD should only 
result in a minor administrative burden, since the required actions 
have already been accomplished.
    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 14 airplanes of U.S. registry will be 
affected by this AD. The FAA has been advised that all 14 affected 
airplanes have been modified in accordance with the requirements of 
this AD. Therefore, currently, this AD action imposes no additional 
economic burden on any U.S. operator.
    However, should an unmodified airplane be imported and placed on 
the U.S. Register in the future, it will take approximately 113 work 
hours per airplane to accomplish the proposed actions, at an average 
labor rate of $55 per work hour. Required parts would cost 
approximately $1,800 per airplane. Based on these figures, the total 
cost impact of the AD is estimated to be $8,015 per airplane.
    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:

94-04-06 Fokker: Amendment 39-8824. Docket 93-NM-107-AD.

    Applicability: Model F28 Mark 0100 series airplanes; serial 
numbers 11244 through 11265 inclusive, 11268 through 11283 
inclusive, 11286, 11289, 11291, 11293, 11295, 11297, 11300, and 
11303; certificated in any category.
    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent loss of braking below 40 miles per hour, when the 
anti-skid system is activated, accomplish the following:
    (a) For all airplanes: Within 3 months after the effective date 
of this AD, replace the existing Dowty Electronics left- and right-
hand ground/flight microswitches, part number 620602801, issue 1, 
with new, improved microswitches, part number 620602801, issue 2, at 
the main landing gear (MLG) downlock, temperature sensor, and anti-
skid harness positions, in accordance with Fokker Service Bulletin 
SBF100-32-060, dated October 20, 1992.
    (b) For airplanes having serial numbers 11244 through 11265 
inclusive, 11268 through 11275 inclusive, 11277, and 11279: Within 
12 months after the effective date of this AD, install an anti-skid 
system ON/OFF switch in the flight compartment in accordance with 
Fokker Service Bulletin SBF100-32-060, dated October 20, 1992.
    (c) As of the effective date of this AD, no person shall install 
a Dowty Electronics left- and/or right-hand ground/flight 
microswitch, part number 620602801, issue 1, on any airplane.
    (d) 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.

    (e) 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.
    (f) The replacement and installation shall be done in accordance 
with Fokker Service Bulletin SBF100-32-060, dated October 20, 1992. 
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.
    (g) This amendment becomes effective on March 21, 1994.

    Issued in Renton, Washington, on February 7, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-3236 Filed 2-16-94; 8:45 am]
BILLING CODE 4910-13-U