Document ID: FAA-2009-0515-0001
Agency: faa
Document Type: Rule
Title: Airworthiness Directives; Fokker Model F.28 Mark 0070 and 0100 Series Airplanes
Posted Date: 2009-06-09T04:00Z

[Federal Register: June 9, 2009 (Volume 74, Number 109)]
[Proposed Rules]
[Page 27260-27262]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr09jn09-9]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-0515; Directorate Identifier 2008-NM-071-AD]
RIN 2120-AA64

Airworthiness Directives; Fokker Model F.28 Mark 0070 and 0100
Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for the
products listed above. This proposed AD results from mandatory
continuing airworthiness information (MCAI) originated by an aviation
authority of another country to identify and correct an unsafe
condition on an aviation product. The MCAI describes the unsafe
condition as:

    Following a red illuminated ``DOOR NOT LOCKED'' status light
indication on the door lock indication panel after lift off, the
cabin crew operated the door lock handle. This resulted in
inadvertent opening of the downward opening passenger door in
flight. * * *
    After inspection, it was found that the false red light might be
the result of an incorrect clearance between lever Part Number (P/N)
A26997-003 and the Up-Limit Switch. If the Up-Limit Switch has an
incorrect clearance, the combination with cabin differential
pressure build-up after lift-off might result in a false steady
illuminating red ``DOOR NOT LOCKED'' indication on the Door
Indication Panel. * * *

* * * * *
    The unsafe condition is inadvertent opening of the door lock handle
in flight, which could result in rapid decompression of the airplane or
ejection of a passenger or crewmember through the door. The proposed AD
would require actions that are intended to address the unsafe condition
described in the MCAI.

DATES: We must receive comments on this proposed AD by July 9, 2009.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to http://
www.regulations.gov. Follow the instructions for submitting comments.
     Fax: (202) 493-2251.
     Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-40, 1200 New
Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
    For service information identified in this proposed AD, contact
Fokker Services B.V., Technical Services Dept., P.O. Box 231, 2150 AE
Nieuw-Vennep, the Netherlands; telephone +31 (0)252-627-350; fax +31
(0)252-627-211; e-mail technicalservices.fokkerservices@stork.com;
Internet http://www.myfokkerfleet.com You may review copies of the
referenced service information at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue, SW., Renton, Washington. For information
on the availability of this material at the FAA, call 425-227-1221 or
425-227-1152.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://
www.regulations.gov; or in person at the Docket Operations office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Operations office (telephone (800) 647-5527) is
in the ADDRESSES section. Comments will be available in the AD docket
shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Tom Rodriguez, Aerospace Engineer,
International Branch, ANM-116, Transport Airplane Directorate, FAA,
1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425)
227-1137; fax (425) 227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or
arguments about this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include ``Docket No. FAA-2009-0515;
Directorate Identifier 2008-NM-071-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD based on those comments.
    We will post all comments we receive, without change, to http://
www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.

Discussion

    The European Aviation Safety Agency (EASA), which is the Technical
Agency for the Member States of the European Community, has issued EASA
Airworthiness Directive 2008-0020, dated January 28, 2008 (referred to
after this as ``the MCAI''), to correct an unsafe condition for the
specified products. The MCAI states:

    Following a red illuminated ``DOOR NOT LOCKED'' status light
indication on the door lock indication panel after lift off, the
cabin crew operated the door lock handle. This resulted in
inadvertent opening of the downward opening passenger door in
flight. It appeared that the cabin crew was unaware of the content
of Fokker 70/100 Service Letter (SL) 272. This SL informs not to
operate the door lock handle after the aircraft has started to move
or before it has come to a complete standstill.
    After inspection, it was found that the false red light might be
the result of an incorrect clearance between lever Part Number (P/N)
A26997-003 and the Up-Limit Switch. If the Up-Limit Switch has an
incorrect clearance, the combination with cabin differential
pressure build-up after lift-off might result in a false steady
illuminating red ``DOOR NOT LOCKED'' indication on the Door
Indication Panel. The original Fokker Service Bulletin SBF100-52-044
and the associated Aircraft Maintenance Manual (AMM) task mentioned
a clearance of 1,3 mm  0,3 mm. Later, based on a trial,
an improved clearance of 0,3 mm  0,2 mm was introduced.
Both documents have been revised for that reason. Later production
serial number aircraft with

[[Page 27261]]

downward opening passenger doors had the correct clearance
introduced before delivery, but no action was taken to inspect and
adjust the clearance on previously delivered or modified (per
SBF100-52-044) serial numbers.
    Since an unsafe condition has been identified that is likely to
exist or develop on other aircraft of the same type design, this
[EASA] Airworthiness Directive (AD) requires two actions:

--The installation of a warning placard near the status lights of
the door lock indication panel, instructing the cabin crew not to
operate the door handle during flight and to inform the flight crew
of the ``DOOR NOT LOCKED'' indication; and
--A one-time inspection of the clearance between lever P/N A26997-
003 and the Up-Limit Switch. If this clearance deviates from the
limits given in AMM task 52-71-01-400-814-A, which is 0,3 mm  0,2 mm (0.0118 inch  0.0079 inch), corrective
actions are required.

    The unsafe condition is inadvertent opening of the door lock handle
in flight, which could result in rapid decompression of the airplane or
ejection of a passenger or crewmember through the door. The corrective
action for improper clearance is adjusting the clearance between the
lever and the up-limit switch. You may obtain further information by
examining the MCAI in the AD docket.

Relevant Service Information

    Fokker Services B.V. has issued Fokker Service Bulletin SBF100-11-
025, Revision 1, dated December 13, 2007; and Fokker Service Bulletin
SBF100-52-086, dated November 1, 2007. The actions described in this
service information are intended to correct the unsafe condition
identified in the MCAI.

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to our bilateral agreement with the State of Design Authority, we have
been notified of the unsafe condition described in the MCAI and service
information referenced above. We are proposing this AD because we
evaluated all pertinent information and determined an unsafe condition
exists and is likely to exist or develop on other products of the same
type design.

Differences Between This AD and the MCAI or Service Information

    We have reviewed the MCAI and related service information and, in
general, agree with their substance. But we might have found it
necessary to use different words from those in the MCAI to ensure the
AD is clear for U.S. operators and is enforceable. In making these
changes, we do not intend to differ substantively from the information
provided in the MCAI and related service information.
    We might also have proposed different actions in this AD from those
in the MCAI in order to follow FAA policies. Any such differences are
highlighted in a Note within the proposed AD.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD
would affect about 10 products of U.S. registry. We also estimate that
it would take about 4 work-hours per product to comply with the basic
requirements of this proposed AD. The average labor rate is $80 per
work-hour. Required parts would cost about $20 per product. Where the
service information lists required parts costs that are covered under
warranty, we have assumed that there will be no charge for these costs.
As we do not control warranty coverage for affected parties, some
parties may incur costs higher than estimated here. Based on these
figures, we estimate the cost of the proposed AD on U.S. operators to
be $3,400, or $340 per product.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. ``Subtitle VII: Aviation
Programs,'' describes in more detail the scope of the Agency's
authority.
    We are issuing this rulemaking under the authority described in
``Subtitle VII, Part A, Subpart III, Section 44701: General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.

Regulatory Findings

    We determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect 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.
    For the reasons discussed above, I certify this proposed
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order
12866;
    2. Is not a ``significant rule'' under the 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.
    We prepared a regulatory evaluation of the estimated costs to
comply with this proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 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), 40113, 44701.

Sec.  39.13  [Amended]

    2. The FAA amends Sec.  39.13 by adding the following new AD:

Fokker Services B.V.: Docket No. FAA-2009-0515; Directorate
Identifier 2008-NM-071-AD.

Comments Due Date

    (a) We must receive comments by July 9, 2009.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Fokker Model F.28 Mark 0070 and 0100
series airplanes, certificated in any category, equipped with a
downward-opening ``airstair'' type passenger door.

Subject

    (d) Air Transport Association (ATA) of America Codes 11 and 52:
Placards and Markings, and Doors, respectively.

Reason

    (e) The mandatory continuing airworthiness information (MCAI)
states:
    Following a red illuminated ``DOOR NOT LOCKED'' status light
indication on the door lock indication panel after lift off, the
cabin crew operated the door lock handle. This resulted in
inadvertent opening of the downward opening passenger door in
flight. It appeared that the cabin crew was unaware

[[Page 27262]]

of the content of Fokker 70/100 Service Letter (SL) 272. This SL
informs not to operate the door lock handle after the aircraft has
started to move or before it has come to a complete standstill.
    After inspection, it was found that the false red light might be
the result of an incorrect clearance between lever Part Number (P/N)
A26997-003 and the Up-Limit Switch. If the Up-Limit Switch has an
incorrect clearance, the combination with cabin differential
pressure build-up after lift-off might result in a false steady
illuminating red ``DOOR NOT LOCKED'' indication on the Door
Indication Panel. The original Fokker Service Bulletin SBF100-52-044
and the associated Aircraft Maintenance Manual (AMM) task mentioned
a clearance of 1,3 mm  0,3 mm. Later, based on a trial,
an improved clearance of 0,3 mm  0,2 mm was introduced.
Both documents have been revised for that reason. Later production
serial number aircraft with downward opening passenger doors had the
correct clearance introduced before delivery, but no action was
taken to inspect and adjust the clearance on previously delivered or
modified (per SBF100-52-044) serial numbers.
    Since an unsafe condition has been identified that is likely to
exist or develop on other aircraft of the same type design, this
[EASA] Airworthiness Directive (AD) requires two actions:

--The installation of a warning placard near the status lights of
the door lock indication panel, instructing the cabin crew not to
operate the door handle during flight and to inform the flight crew
of the ``DOOR NOT LOCKED'' indication; and
--A one-time inspection of the clearance between lever P/N A26997-
003 and the Up-Limit Switch. If this clearance deviates from the
limits given in AMM task 52-71-01-400-814-A, which is 0,3 mm  0,2 mm (0.0118 inch  0.0079 inch), corrective
actions are required.

    The unsafe condition is inadvertent opening of the door lock
handle in flight, which could result in rapid decompression of the
airplane or ejection of a passenger or crewmember through the door.
The corrective action for improper clearance is adjusting the
clearance between the lever and the up-limit switch.

Actions and Compliance

    (f) Unless already done, do the following actions:
    (1) Within 500 flight cycles or 4 months after the effective
date of this AD, whichever occurs first, install a new warning
placard near the status lights of the panel of the door lock
indication, in accordance with the Accomplishment Instructions of
Fokker Service Bulletin SBF100-11-025, Revision 1, dated December
13, 2007.
    (2) Within 4,000 flight cycles after the effective date of this
AD, do a one-time inspection of the clearance between lever P/N
A26997-003 and the up-limit switch, in accordance with the
Accomplishment Instructions of Fokker Service Bulletin SBF100-52-
086, dated November 1, 2007.
    (3) If any clearance is found outside the range defined in the
service bulletin during the inspection required by paragraph (f)(2)
of this AD, before further flight, correct the clearance in
accordance with the Accomplishment Instructions of Fokker Service
Bulletin SBF100-52-086, dated November 1, 2007.
    (4) If done before the effective date of this AD, installing the
warning placard near the status lights of the panel of the door lock
indication, in accordance with Fokker Service Bulletin SBF100-11-
025, dated November 1, 2007, is acceptable for compliance with the
requirements of paragraph (f)(1) of this AD.
    (5) Modifying the airplane in accordance with Fokker Service
Bulletin SBF 100-52-044, Revision 1, dated November 1, 2007,
terminates the requirements of paragraph (f)(2) of this AD.

FAA AD Differences

    Note 1: This AD differs from the MCAI and/or service information
as follows:

Note 1 of the ``Compliance'' section of European Aviation Safety
Agency Airworthiness Directive 2008-0020, dated January 28, 2008,
states that any airplane that has not yet been modified in
accordance with Fokker Service Bulletin SBF 100-52-069, dated
December 3, 2001, must be done prior to or concurrently with
paragraph (f)(1) of this AD. However, all U.S. airplanes have met
this requirement with issuance of AD 2006-03-07, amendment 39-14471;
therefore, modification in accordance with Fokker Service Bulletin
SBF 100-52-069, dated December 3, 2001, is not applicable.

Other FAA AD Provisions

    (g) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager,
International Branch, ANM-116, Transport Airplane Directorate, FAA,
has the authority to approve AMOCs for this AD, if requested using
the procedures found in 14 CFR 39.19. Send information to ATTN: Tom
Rodriguez, Aerospace Engineer, International Branch, ANM-116,
Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton,
Washington 98057-3356; telephone (425) 227-1137; fax (425) 227-1149.
Before using any approved AMOC on any airplane to which the AMOC
applies, notify your principal maintenance inspector (PMI) or
principal avionics inspector (PAI), as appropriate, or lacking a
principal inspector, your local Flight Standards District Office.
    (2) Airworthy Product: For any requirement in this AD to obtain
corrective actions from a manufacturer or other source, use these
actions if they are FAA-approved. Corrective actions are considered
FAA-approved if they are approved by the State of Design Authority
(or their delegated agent). You are required to assure the product
is airworthy before it is returned to service.
    (3) Reporting Requirements: For any reporting requirement in
this AD, under the provisions of the Paperwork Reduction Act, the
Office of Management and Budget (OMB) has approved the information
collection requirements and has assigned OMB Control Number 2120-
0056.

Related Information

    (h) Refer to MCAI EASA Airworthiness Directive 2008-0020, dated
January 28, 2008, and Fokker Service Bulletin SBF100-11-025,
Revision 1, dated December 13, 2007; and Fokker Service Bulletin
SBF100-52-086, dated November 1, 2007; for related information.

    Issued in Renton, Washington, on June 1, 2009.
Stephen P. Boyd,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E9-13350 Filed 6-8-09; 8:45 am]

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