AD 2004-05-17

[Federal Register Volume 69, Number 47 (Wednesday, March 10, 2004)]
[Rules and Regulations]
[Pages 11303-11305]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 04-5070]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2002-NM-178-AD; Amendment 39-13512; AD 2004-05-17]
RIN 2120-AA64


Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. 
(EMBRAER) Model EMB-135 and -145 Series Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment supersedes an existing airworthiness directive 
(AD), applicable to all Model EMB-135 and -145 series airplanes, that 
currently requires repetitive inspections to detect discrepancies of 
both vertical-to-horizontal stabilizer bonding jumpers and the 
connecting support structure, and corrective action if necessary. This 
amendment requires modification of the bonding jumpers, including the 
installation of a protective cover to the elevator control cables, 
which terminates the requirements of the existing AD. The actions 
specified by this AD are intended to prevent damaged or severed bonding 
jumpers, which, in the event of a lightning strike, could result in 
severed elevator control cables and consequent reduced elevator control 
capability and reduced controllability of the airplane. This action is 
intended to address the identified unsafe condition.

DATES: Effective April 14, 2004.
    The incorporation by reference of EMBRAER Service Bulletin 145-55-
0028, Revision 02, dated February 27, 2003, as listed in the 
regulations, is approved by the Director of the Federal Register as of 
April 14, 2004.
    The incorporation by reference of EMBRAER Alert Service Bulletin 
145-55-A028, dated April 10, 2002, as listed in the regulations, was 
approved previously by the Director of the Federal Register as of May 
16, 2002 (67 FR 21572, May 1, 2002).
    The incorporation by reference of EMBRAER Alert Service Bulletin 
145-55-A025, dated June 5, 2001, as listed in the regulations, was 
approved previously by the Director of the Federal Register as of 
September 5, 2001 (66 FR 43768, August 21, 2001).

ADDRESSES: The service information referenced in this AD may be 
obtained from Empresa Brasileira de Aeronautica S.A. (EMBRAER), P.O. 
Box 343--CEP 12.225, Sao Jose dos Campos--SP, Brazil. 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: Todd Thompson, Aerospace Engineer, 
International Branch, ANM-116, FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 
227-1175; fax (425) 227-1149.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations (14 CFR part 39) by superseding AD 2002-08-21, 
amendment 39-12733 (67 FR 21572, May 1, 2002), which is applicable to 
all EMBRAER Model EMB-135 and -145 series airplanes, was published in 
the Federal Register on December 3, 2003 (68 FR 67613). The action 
proposed to require repetitive inspections to detect discrepancies of 
both vertical-to-horizontal stabilizer bonding jumpers and the 
connecting support structure, corrective action if necessary, and 
modification of the bonding jumpers, including the installation of a 
protective cover to the elevator control cables, which would terminate 
the repetitive inspections.

[[Page 11304]]

Comments

    We provided the public the opportunity to participate in the 
development of this AD. No comments have been submitted on the proposed 
AD or on the determination of the cost to the public.

Conclusion

    We have carefully reviewed the available data and determined that 
air safety and the public interest require adopting the AD as proposed.

Cost Impact

    This AD affects about 360 airplanes of U.S. registry.
    The actions that are currently required by AD 2002-08-21 take about 
2 work hours per airplane, at an average labor rate of $65 per work 
hour. Based on these figures, the cost impact of the currently required 
actions on U.S. operators is estimated to be $46,800, or $130 per 
airplane, per inspection cycle.
    The terminating action required by this AD will take about 6 work 
hours per airplane, at an average labor rate of $65 per work hour. 
Required parts will cost about $206 per airplane. Based on these 
figures, the cost impact of the requirements of this AD on U.S. 
operators is estimated to be $214,560, or $596 per airplane.
    The cost impact figures discussed above are 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 cost impact figures discussed 
in AD rulemaking actions represent only the time necessary to perform 
the specific actions actually required by the AD. These figures 
typically do not include incidental costs, such as the time required to 
gain access and close up, planning time, or time necessitated by other 
administrative actions.

Regulatory Impact

    The regulations adopted herein will 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. Therefore, it 
is determined that this final rule does not have federalism 
implications under Executive Order 13132.
    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

0
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

0
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]

0
2. Section 39.13 is amended by removing amendment 39-12733 (67 FR 
21572, May 1, 2002), and by adding a new airworthiness directive (AD), 
amendment 39-13512, to read as follows:

2004-05-17 Empresa Brasileira de Aeronautica S.A. (EMBRAER): 
Amendment 39-13512. Docket 2002-NM-178-AD. Supersedes AD 2002-08-21, 
Amendment 39-12733.

    Applicability: All Model EMB-135 and -145 series airplanes; 
certificated in any category.
    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent damaged or severed bonding jumpers, which, in the 
event of a lightning strike, could result in severed elevator 
control cables and consequent reduced elevator control capability 
and reduced controllability of the airplane, accomplish the 
following:

Restatement of Requirements of AD 2002-08-21

Inspection of the Bonding Jumpers

    (a) For airplanes subject to the requirements of AD 2001-17-04, 
amendment 39-12395 (which was superseded by AD 2002-08-21, amendment 
12733): Except as provided by paragraph (f) of this AD, within the 
next 100 flight hours after September 5, 2001 (the effective date of 
AD 2001-17-04), perform a detailed inspection to determine if the 
two bonding jumpers that connect the horizontal to the vertical 
stabilizers are properly installed, per EMBRAER Alert Service 
Bulletin 145-55-A025, dated June 5, 2001.

    Note 1: For the purposes of this AD, a detailed inspection is 
defined as: ``An intensive visual examination of a specific 
structural area, system, installation, or assembly to detect damage, 
failure, or irregularity. Available lighting is normally 
supplemented with a direct source of good lighting at intensity 
deemed appropriate by the inspector. Inspection aids such as mirror, 
magnifying lenses, etc., may be used. Surface cleaning and elaborate 
access procedures may be required.''

Follow-on Action

    (b) For airplanes subject to the requirements of paragraph (a) 
of this AD: If both bonding jumpers are installed properly, before 
further flight, determine if the jumpers are mechanically tensioned 
to a slack distance of 5 millimeters (mm) or less between the 
reference line and the jumper as specified in View E of EMBRAER 
Alert Service Bulletin 145-55-A025, dated June 5, 2001.
    (1) If any slack distance is 5 mm or less, before further 
flight, replace the bonding jumper with a new jumper having part 
number (P/N) LN926416X165, per the alert service bulletin.
    (2) If any slack distance is 6 mm or more, at the time specified 
in paragraph (d) of this AD, accomplish those actions specified in 
paragraph (d) of this AD.

Corrective Actions

    (c) For airplanes subject to the requirements of paragraph (a) 
of this AD: If either bonding jumper is not installed properly 
(e.g., misaligned, signs of previous elongation, or damage), before 
further flight, replace the bonding jumper with a new jumper having 
P/N LN926416X165, per EMBRAER Alert Service Bulletin 145-55-A025, 
dated June 5, 2001.

Inspection of the Connecting Supports

    (d) For airplanes subject to the requirements of AD 2001-17-04: 
Within the next 100 flight hours after September 5, 2001, perform a 
detailed inspection to determine if the supports that connect the 
bonding jumpers to the horizontal stabilizers are deformed, cracked, 
or ruptured; per EMBRAER Alert Service Bulletin 145-55-A025, dated 
June 5, 2001.
    (1) If no deformation is detected, no further action is required 
by this paragraph.
    (2) If any connecting support having deformation of 30 degrees 
or less has any sign of a painting discrepancy, before further 
flight, repaint the support per the alert service bulletin. The 
support must remain in the position it was found, as specified in 
the alert service bulletin.
    (3) If any connecting support is deformed above 30 degrees or 
any signs of cracking or ruptures are detected, before further 
flight, replace the connecting support with a new support per the 
alert service bulletin.
    (e) For airplanes subject to the requirements of AD 2001-17-04: 
If the inspection required by paragraph (f) of this AD is performed 
before the inspections specified in paragraphs (a) and (d) of this 
AD, it is not necessary to perform the inspections specified in 
paragraphs (a) and (d) of this AD.

[[Page 11305]]

Repetitive Inspections

    (f) For all airplanes: Except as required by paragraphs (h) and 
(i) of this AD, within 100 flight hours after May 16, 2002 (the 
effective date of AD 2002-08-21), perform a detailed inspection as 
specified in paragraphs (f)(1) and (f)(2) of this AD, per EMBRAER 
Alert Service Bulletin 145-55-A028, dated April 10, 2002; or Service 
Bulletin 145-55-0028, Revision 02, dated February 27, 2003. If any 
discrepancy is found during any inspection required by this 
paragraph: Before further flight, perform applicable corrective 
actions (including replacing any discrepant part with a new part and 
restoring the support painting) per the alert service bulletin. 
Repeat the inspection at intervals not to exceed 800 flight hours, 
except as provided by paragraphs (h) and (i) of this AD.
    (1) Inspect both bonding jumpers of the vertical-to-horizontal 
stabilizer to detect discrepancies (including overstretching, 
fraying, or other damage; and misaligned or otherwise incorrectly 
installed bonding jumper terminals).
    (2) Inspect the connecting support structure to detect 
deformation or signs of cracks or ruptures, and, before further 
flight, inspect the general conditions of the paint of any 
discrepant support.
    (g) Inspections done before the effective date of this AD per 
EMBRAER Alert Service Bulletin 145-55-A028, Change 01, dated June 7, 
2002, are acceptable for compliance with the requirements of 
paragraph (f) of this AD.

Conditional Requirements for Immediate Inspection

    (h) Notwithstanding the requirements of paragraph (f) of this 
AD: Before further flight following removal of any parts identified 
in paragraphs (h)(1), (h)(2), and (h)(3) of this AD, perform the 
inspection specified in paragraph (f) of this AD. The task numbers 
below are identified in EMBRAER Airplane Maintenance Manuals AMM-
145/1124 and AMM-145/1230.
    (1) The horizontal stabilizer (as specified in EMBRAER Airplane 
Maintenance Manual (AMM) task number 55-10-00-000-801-A).
    (2) The horizontal stabilizer actuator (as specified in AMM task 
number 27-40-02-000-801-A).
    (3) The left-hand or right-hand seal fairings (as specified in 
AMM task number 55-36-00-020-002-A00).
    (i) Before further flight following a lightning strike, perform 
a ``Lightning Strike--Inspection Check'' and applicable corrective 
actions, per AMM task number 05-50-01-06.

    Note 2: Following accomplishment of an inspection per paragraph 
(h) or (i) of this AD, the repetitive interval of the next 
inspection may be extended to 800 flight hours after accomplishment 
of the inspection required by paragraph (h) or (i) of this AD, as 
applicable.

New Requirements of This AD

Terminating Action

    (j) Within 800 flight hours after the effective date of this AD, 
modify the bonding jumpers, including installing a protective cover 
for the elevator control cables, in accordance with Part II of the 
Accomplishment Instructions of EMBRAER Service Bulletin 145-55-0028, 
Revision 02, dated February 27, 2003. Accomplishment of this 
modification terminates the requirements of this AD.
    (k) A modification done before the effective date of this AD per 
EMBRAER Service Bulletin 145-55-0028, Change 01, dated June 7, 2002, 
is acceptable for compliance with the requirements of paragraph (j) 
of this AD.

Alternative Methods of Compliance

    (l) In accordance with 14 CFR 39.19, the Manager, International 
Branch, ANM-116, Transport Airplane Directorate, FAA, is authorized 
to approve alternative methods of compliance for this AD.

Incorporation by Reference

    (m) Unless otherwise specified in this AD, the actions shall be 
done in accordance with EMBRAER Alert Service Bulletin 145-55-A025, 
dated June 5, 2001; EMBRAER Alert Service Bulletin 145-55-A028, 
dated April 10, 2002; and EMBRAER Service Bulletin 145-55-0028, 
Revision 02, dated February 27, 2003; as applicable. EMBRAER Service 
Bulletin 145-55-0028, Revision 02, contains the following effective 
pages:

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                                           Revision level shown on
                Page No.                            page                          Date shown on page
----------------------------------------------------------------------------------------------------------------
1, 2...................................  02........................  February 27, 2003.
3-6, 19-22.............................  01........................  June 7, 2002.
7-18, 23-31............................  Original..................  May 20, 2002.
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    (1) The incorporation by reference of EMBRAER Service Bulletin 
145-55-0028, Revision 02, dated February 27, 2003, is approved by 
the Director of the Federal Register, in accordance with 5 U.S.C. 
552(a) and 1 CFR part 51.
    (2) The incorporation by reference of EMBRAER Alert Service 
Bulletin 145-55-A028, dated April 10, 2002, was approved previously 
by the Director of the Federal Register as of May 16, 2002 (67 FR 
21572, May 1, 2002).
    (3) The incorporation by reference of EMBRAER Alert Service 
Bulletin 145-55-A025, dated June 5, 2001, was approved previously by 
the Director of the Federal Register as of September 5, 2001 (66 FR 
43768, August 21, 2001).
    (4) Copies may be obtained from Empresa Brasileira de 
Aeronautica S.A. (EMBRAER), P.O. Box 343--CEP 12.225, Sao Jose dos 
Campos--SP, Brazil. 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.

    Note 3: The subject of this AD is addressed in Brazilian 
airworthiness directive 2001-06-03R2, dated June 24, 2002.

Effective Date

    (n) This amendment becomes effective on April 14, 2004.

    Issued in Renton, Washington, on March 1, 2004.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 04-5070 Filed 3-9-04; 8:45 am]
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