[Federal Register Volume 63, Number 20 (Friday, January 30, 1998)]
[Rules and Regulations]
[Pages 4564-4565]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-1973]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-NM-256-AD; Amendment 39-10294; AD 98-03-02]
RIN 2120-AA64


Airworthiness Directives; Bombardier Model CL-600-1A11 and CL-
600-2A12 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 Bombardier Model CL-600-1A11 and CL-600-2A12 
series airplanes, that requires replacement of the anti-noise filter on 
the standby and auxiliary power unit (APU) fuel pump assemblies with a 
new filter. This amendment is prompted by issuance of mandatory 
continuing airworthiness information by a foreign civil airworthiness 
authority. The actions specified by this AD are intended to prevent 
electrical arcing between the internal wiring and casing of the anti-
noise filter on the standby and APU fuel pump assemblies, and 
consequent increased risk of fuel tank explosion or fire.

DATES: Effective March 6, 1998.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of March 6, 1998.

ADDRESSES: The service information referenced in this AD may be 
obtained from Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 
6087, Station A, Montreal, Quebec H3C 3G9, Canada. 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 FAA, Engine and Propeller Directorate, New York 
Aircraft Certification Office, 10 Fifth Street, Third Floor, Valley 
Stream, New York; or at the Office of the Federal Register, 800 North 
Capitol Street, NW., suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Wing Chan, Aerospace Engineer, Systems 
and Equipment Branch, ANE-172, FAA, Engine and Propeller Directorate, 
New York Aircraft Certification Office, 10 Fifth Street, Third Floor, 
Valley Stream, New York 11581; telephone (516) 256-7511; fax (516) 568-
2716.

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 Bombardier Model CL-600-
1A11 and CL-600-2A12 series airplanes was published in the Federal 
Register on November 19, 1997 (62 FR 61706). That action proposed to 
require replacement of the anti-noise filter on the standby and 
auxiliary power unit (APU) fuel pump assemblies with a new filter.

Comments

    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.

Conclusion

    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.

Cost Impact

    The FAA estimates that 84 Model CL-600-1A11 and CL-600-2A12 series 
airplanes of U.S. registry will be affected by this AD, that it will 
take approximately 20 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 $5,689 per airplane. Based on 
these figures, the cost impact of the AD on U.S. operators is estimated 
to be $578,676, or $6,889 per airplane.
    The 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.

Regulatory Impact

    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. 106(g), 40113, 44701.

Sec. 39.13  [Amended]

    2. Section 39.13 is amended by adding the following new 
airworthiness directive:

98-03-02  Bombardier, Inc. (Formerly Canadair): Amendment 39-10294. 
Docket 97-NM-256-AD.

    Applicability: Model CL-600-1A11 series airplanes, as listed in 
Bombardier Canadair Challenger Alert Service Bulletin A600-0644,

[[Page 4565]]

Revision 01, dated March 31, 1995; and Model CL-600-2A12 series 
airplanes, as listed in Bombardier Canadair Challenger Alert Service 
Bulletin A601-0441, Revision 01, dated March 31, 1995; 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 request approval for an 
alternative method of compliance in accordance with paragraph (c) of 
this AD. The request should include an assessment of the effect of 
the modification, alteration, or repair on the unsafe condition 
addressed by this AD; and, if the unsafe condition has not been 
eliminated, the request should include specific proposed actions to 
address it.

    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent electrical arcing between the internal wiring and 
casing of the anti-noise filter on the standby and auxiliary power 
unit (APU) fuel pump assemblies, and consequent increased risk of 
fuel tank explosion or fire, accomplish the following:
    (a) Within 100 flight hours after the effective date of this AD, 
replace the anti-noise filter on the standby and auxiliary power 
unit (APU) fuel pump assemblies with a new filter, in accordance 
with Part B of Bombardier Canadair Challenger Alert Service Bulletin 
A600-0644, Revision 01, dated March 31, 1995 (for Model CL-600-1A11 
series airplanes), or Bombardier Canadair Challenger Alert Service 
Bulletin A601-0441, Revision 01, dated March 31, 1995 (for Model CL-
600-2A12 series airplanes); as applicable.
    (b) As of the effective date of this AD, no person shall install 
on any airplane a fuel pump having part number (P/N) 600-62966-25 or 
600-62966-27 with an anti-noise filter having P/N 160-151501 (prior 
to revision H stamped on the part) installed.
    (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, New York Aircraft Certification 
Office (ACO), FAA, Engine and Propeller Directorate. Operators shall 
submit their requests through an appropriate FAA Principal 
Maintenance Inspector, who may add comments and then send it to the 
Manager, New York ACO.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the New York ACO.

    (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 replacement shall be done in accordance with Bombardier 
Canadair Challenger Alert Service Bulletin A600-0644, Revision 01, 
dated March 31, 1995; Bombardier Canadair Challenger Alert Service 
Bulletin A601-0441, Revision 01, dated March 31, 1995; as 
applicable. 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 Bombardier, Inc., 
Canadair, Aerospace Group, P.O. Box 6087, Station A, Montreal, 
Quebec H3C 3G9, Canada. Copies may be inspected at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington; or at the FAA Engine and Propeller Directorate, New York 
Aircraft Certification Office, 10 Fifth Street, Third Floor, Valley 
Stream, New York; 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 Canadian 
airworthiness directive CF-97-02, dated February 25, 1997.

    (f) This amendment becomes effective on March 6, 1998.

    Issued in Renton, Washington, on January 21, 1998.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 98-1973 Filed 1-29-98; 8:45 am]
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