Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL- 604) Series Airplanes

[Federal Register Volume 64, Number 248 (Tuesday, December 28, 1999)]
[Rules and Regulations]
[Pages 72528-72530]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-33168]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 99-NM-166-AD; Amendment 39-11476; AD 99-26-16]
RIN 2120-AA64


Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), 
CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-
604) 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 (CL-600), CL-600-
2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) 
series airplanes, that requires, for certain airplanes, removing the 
hydraulic tube assemblies from the main landing gear (MLG) bay, 
installing new re-routed hydraulic tube assemblies, and repositioning a 
fuel line, as applicable. For certain other airplanes, this amendment 
requires a general visual inspection to determine the routing of 
certain hydraulic and fuel lines, and repair, if necessary. 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 damage to hydraulic and 
fuel lines resulting from failure of an MLG, which could cause a fire 
in the MLG wheel well.

DATES: Effective February 1, 2000.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of February 1, 2000.

ADDRESSES: The service information referenced in this AD may be 
obtained from Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 
6087, Station Centreville, 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: James E. Delisio, Aerospace Engineer, 
Airframe and Propulsion Branch, ANE-171, FAA, Engine and Propeller 
Directorate, New York Aircraft Certification Office, 10 Fifth Street, 
Third Floor, Valley Stream, New York 11581; telephone (516) 256-7521; 
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 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-
601-3R, and CL-604) series airplanes was published in the Federal 
Register on October 27, 1999 (64 FR 57798). For certain airplanes, that 
action proposed to require removing the hydraulic tube assemblies from 
the main landing gear (MLG) bay, installing new re-routed hydraulic 
tube assemblies, and repositioning a fuel line, as applicable. For 
certain other airplanes, that action proposed to require a general 
visual inspection to determine the routing of certain hydraulic and 
fuel lines, and repair, if necessary.

Comments

    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were submitted in response 
to the proposal or the FAA's determination of the cost to the public.

[[Page 72529]]

Conclusion

    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 249 airplanes of U.S. registry will be 
affected by this AD.
    The FAA estimates that 231 Model CL-600-1A11 (CL-600), CL-600-2A12 
(CL-601), and CL-600-2B16 (CL-601-3A and -3R) series airplanes will be 
affected by this proposed 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. Based on these figures, the 
cost impact of the AD on U.S. operators of these airplanes is estimated 
to be $277,200, or $1,200 per airplane.
    The FAA estimates that 18 Model CL-600-2B16 (CL-604) series 
airplanes will be affected by this AD, that it will take approximately 
1 work hour per airplane to accomplish the required inspection. Based 
on these figures, the cost impact of the AD on U.S. operators of these 
airplanes is estimated to be $1,080, or $60 per airplane.
    The cost impact figures discussed above are based on assumptions 
that no operator has yet accomplished any of the proposed 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 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

    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:

99-26-16 Bombardier, Inc. (Formerly Canadair): Amendment 39-11476. 
Docket 99-NM-166-AD.

    Applicability: Model CL-600-1A11 (CL-600) series airplanes, 
serial numbers 1004 through 1085 inclusive; Model CL-600-2A12 (CL-
601) series airplanes, serial numbers 3001 through 3066 inclusive; 
Model CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) series 
airplanes, serial numbers 5001 through 5194 inclusive, and 5301 
through 5317 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 request approval for an 
alternative method of compliance in accordance with paragraph (b) 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 damage to hydraulic and fuel lines resulting from 
failure of a main landing gear (MLG), which could cause a fire in 
the MLG wheel well, accomplish the following:

Inspection and Modification

    (a) Within 300 landings or 12 months after the effective date of 
this AD, whichever occurs first, accomplish the actions in paragraph 
(a)(1), (a)(2), or (a)(3) of this AD, as applicable.
    (1) For Model CL-600-1A11 (CL-600) series airplanes: Remove the 
five existing hydraulic tube assemblies from the MLG bay, install 
six new re-routed hydraulic tube assemblies, and reposition a fuel 
line, in accordance with Bombardier Service Bulletin 600-0671, dated 
August 4, 1997.
    (2) For Model CL-600-2A12 (CL-601) and CL-600-2B16 (CL-601-3A 
and -3R) series airplanes: Remove the five existing hydraulic tube 
assemblies from the MLG bay, and install six new re-routed hydraulic 
tube assemblies, in accordance with Bombardier Service Bulletin 601-
0482, dated April 15, 1997.
    (3) For Model CL-600-2B16 (CL-604) series airplanes: Perform a 
general visual inspection of the routing of the hydraulic and fuel 
lines in the MLG bay in accordance with Bombardier Service Bulletin 
604-29-001, dated December 20, 1996.

    Note 2: For the purposes of this AD, a general visual inspection 
is defined as: ``A visual examination of an interior or exterior 
area, installation, or assembly to detect obvious damage, failure, 
or irregularity. This level of inspection is made under normally 
available lighting conditions such as daylight, hangar lighting, 
flashlight, or drop-light, and may require removal or opening of 
access panels or doors. Stands, ladders, or platforms may be 
required to gain proximity to the area being checked.''

    (i) If all hydraulic lines are routed in accordance with the 
service bulletin, no further action is required by this paragraph.
    (ii) If any hydraulic line is not routed in accordance with the 
service bulletin, prior to further flight, repair in accordance with 
a method approved by the Manager, New York Aircraft Certification 
Office (ACO), FAA, Engine and Propeller Directorate.

Alternative Methods of Compliance

    (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, New York ACO. 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 3: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the New York ACO.

Special Flight Permits

    (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.

Incorporation by Reference

    (d) Except as provided in paragraph (a)(3)(ii), the actions 
shall be done in accordance with Bombardier Service Bulletin 600-
0671, dated August 4, 1997; Bombardier Service Bulletin 601-0482, 
dated April 15, 1997; and Bombardier Service Bulletin 604-29-001, 
dated December 20, 1996, 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 Centreville, Montreal, Quebec H3C 3G9, Canada. Copies 
may be inspected at the FAA, Transport Airplane Directorate, 1601 
Lind Avenue,

[[Page 72530]]

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 4: The subject of this AD is addressed in Canadian 
airworthiness directive CF-99-14, dated May 7, 1999.

    (e) This amendment becomes effective on February 1, 2000.

    Issued in Renton, Washington, on December 16, 1999.
D. L. Riggin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 99-33168 Filed 12-27-99; 8:45 am]
BILLING CODE 4910-13-U

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