[Federal Register Volume 64, Number 94 (Monday, May 17, 1999)]
[Rules and Regulations]
[Pages 26653-26656]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-12099]
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Rules and Regulations
Federal Register
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This section of the FEDERAL REGISTER contains regulatory documents
having general applicability and legal effect, most of which are keyed
to and codified in the Code of Federal Regulations, which is published
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Federal Register / Vol. 64, No. 94 / Monday, May 17, 1999 / Rules and
Regulations
[[Page 26653]]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 99-NM-99-AD; Amendment 39-11170; AD 99-09-52]
RIN 2120-AA64
Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional
Jet Series 100) and CL-600-2B16 (CL-601-3R and CL-604) Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule; request for comments.
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SUMMARY: This document publishes in the Federal Register an amendment
adopting airworthiness directive (AD) 99-09-52 that was sent previously
to all known U.S. owners and operators of Bombardier Model CL-600-2B19
(Regional Jet Series 100) and CL-600-2B16 (CL-601-3R and CL-604) series
airplanes by individual notices. This AD requires a one-time inspection
of the cable harness of the integrated drive generator (IDG) in the
right engine nacelle and the adjacent structure to verify clearances
and detect chafing; a one-time inspection of both the left and right
engine nacelles to detect chafing and verify clearances of the adjacent
10th stage bleed air check valve and fuel manifold pigtails; and repair
or replacement of discrepant parts, if necessary. This action is
prompted by reports of chafing of the insulation covering on the IDG
cable harness and the main engine right fuel manifold. The actions
specified by this AD are intended to detect and correct concurrent
chafing of both the fuel manifold and the IDG wire and subsequent
leakage of fuel, which could come in contact with live wiring and
result in fire or explosion.
DATES: Effective May 24, 1999, to all persons except those persons to
whom it was made immediately effective by emergency AD T99-09-52,
issued April 20, 1999, which contained the requirements of this
amendment.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of May 24, 1999.
Comments for inclusion in the Rules Docket must be received on or
before June 16, 1999.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-114,
Attention: Rules Docket No. 99-NM-99-AD, 1601 Lind Avenue, SW., Renton,
Washington 98055-4056.
The applicable service information 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 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.
FOR FURTHER INFORMATION CONTACT: James 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: On April 20, 1999, the FAA issued emergency
AD T99-09-52, which is applicable to certain Bombardier Model CL-600-
2B19 (Regional Jet Series 100) and CL-600-2B16 (CL-601-3R and CL-604)
series airplanes.
That action was prompted by reports of chafing of the insulation
covering on the integrated drive generator (IDG) cable harness and the
main engine right fuel manifold. Concurrent chafing of both the fuel
manifold and the IDG wire, if not corrected, could result in leakage of
fuel, which could come in contact with live wiring and result in fire
or explosion.
Explanation of Relevant Service Information
Bombardier has issued Alert Service Bulletin A601R-24-095, Revision
`A,' dated March 25, 1999 (for Regional Jet series airplanes). That
alert service bulletin describes procedures for a one-time inspection
of the IDG cables in the right engine nacelle to verify clearances and
detect damage. The alert service bulletin also describes procedures for
repair or replacement of the IDG cables, depending on the results of
the inspection.
Bombardier has issued Alert Service Bulletin A601R-73-008, Revision
`A,' dated April 10, 1999 (for Regional Jet series airplanes). That
alert service bulletin describes procedures for a one-time inspection
of both the left and right engine nacelles to detect damage of the area
surrounding the 10th stage bleed air check valve and the top and bottom
pigtails of the fuel manifold; a one-time inspection to verify
clearances between the right fuel manifold pigtails and the adjacent
10th stage bleed air check valve; and repair or replacement of the
manifold, depending on the results of the inspection.
Bombardier has issued Alert Service Bulletin A601-0524, dated April
19, 1999 [for Model CL-600-2B16 (CL-601-3R) series airplanes], and
Alert Service Bulletin A604-73-001, dated April 19, 1999 [for Model CL-
600-2B16 (CL-604) series airplanes]. These alert service bulletins
describe procedures for a one-time inspection of the IDG cable harness
in the right engine nacelle and the adjacent structure to verify
clearances and detect chafing; a one-time inspection of both the left
and right engine nacelles to detect chafing and verify clearances of
the adjacent 10th stage bleed air check valve and fuel manifold
pigtails; and repair or replacement, depending on the results of the
inspection.
Transport Canada Aviation (TCA), which is the airworthiness
authority for Canada, classified the alert service bulletins as
mandatory and issued Canadian airworthiness directive CF-99-09, dated
April 6, 1999, in order to assure the continued airworthiness of these
airplanes in Canada.
FAA's Conclusions
These airplane models are manufactured in Canada and are type
certificated for operation in the United
[[Page 26654]]
States under the provisions of section 21.29 of the Federal Aviation
Regulations (14 CFR 21.29) and the applicable bilateral airworthiness
agreement. Pursuant to this bilateral airworthiness agreement, TCA has
kept the FAA informed of the situation described above. The FAA has
examined the findings of TCA, reviewed all available information, and
determined that AD action is necessary for products of this type design
that are certificated for operation in the United States.
Explanation of the Requirements of the Rule
Since the unsafe condition described is likely to exist or develop
on other airplanes of the same type design registered in the United
States, the FAA issued emergency AD 99-09-52 to detect and correct
concurrent chafing of both the fuel manifold and the IDG wire and
subsequent leakage of fuel, which could come in contact with live
wiring and result in fire or explosion. The AD requires accomplishment
of the actions specified in the alert service bulletins described
previously, except as discussed below. This AD also requires that
operators report results of all inspection findings and any repairs
performed to Bombardier.
Differences Between This AD and the Relevant Service Information
While the Canadian airworthiness directive and the alert service
bulletins recommend a compliance time of 50 flight hours, this AD
specifies a compliance time of 50 flight hours or 7 days, whichever
occurs first. The Challenger and certain Regional Jet series airplanes
are operated as business jets, which generally fly fewer hours per day
than commercial airplanes. The FAA has determined that it is necessary
to impose a time limit on these airplanes to ensure the safe operation
of the fleet.
Operators should further note that, although certain alert service
bulletins referenced in this AD specify that the manufacturer may be
contacted for disposition of certain repair conditions, this AD
requires the repair of those conditions to be accomplished in
accordance with a method approved by either the FAA or TCA (or its
delegated agent). In light of the type of repair that would be required
to address the identified unsafe condition, and in consonance with
existing bilateral airworthiness agreements, the FAA has determined
that, for this AD, a repair approved by either the FAA or TCA will be
acceptable for compliance with this AD.
Publication of the Rule
Since it was found that immediate corrective action was required,
notice and opportunity for prior public comment thereon were
impracticable and contrary to the public interest, and good cause
existed to make the AD effective immediately by individual notices
issued on April 20, 1999, to all known U.S. owners and operators of
Bombardier Model CL-600-2B19 (Regional Jet Series 100) and CL-600-2B16
(CL-601-3R and CL-604) series airplanes. These conditions still exist,
and the AD is hereby published in the Federal Register as an amendment
to section 39.13 of the Federal Aviation Regulations (14 CFR 39.13) to
make it effective as to all persons.
Comments Invited
Although this action is in the form of a final rule that involves
requirements affecting flight safety and, thus, was not preceded by
notice and an opportunity for public comment, comments are invited on
this rule. Interested persons are invited to comment on this rule by
submitting such written data, views, or arguments as they may desire.
Communications shall identify the Rules Docket number and be
submitted in triplicate to the address specified under the caption
ADDRESSES. All communications received on or before the closing date
for comments will be considered, and this rule may be amended in light
of the comments received. Factual information that supports the
commenter's ideas and suggestions is extremely helpful in evaluating
the effectiveness of the AD action and determining whether additional
rulemaking action would be needed.
Comments are specifically invited on the overall regulatory,
economic, environmental, and energy aspects of the rule that might
suggest a need to modify the rule. All comments submitted will be
available, both before and after the closing date for comments, in the
Rules Docket for examination by interested persons. A report that
summarizes each FAA-public contact concerned with the substance of this
AD will be filed in the Rules Docket.
Commenters wishing the FAA to acknowledge receipt of their comments
submitted in response to this rule must submit a self-addressed,
stamped postcard on which the following statement is made: ``Comments
to Docket Number 99-NM-99-AD.'' The postcard will be date stamped and
returned to the commenter.
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.
The FAA has determined that this regulation is an emergency
regulation that must be issued immediately to correct an unsafe
condition in aircraft, and that it is not a ``significant regulatory
action'' under Executive Order 12866. It has been determined further
that this action involves an emergency regulation under DOT Regulatory
Policies and Procedures (44 FR 11034, February 26, 1979). If it is
determined that this emergency regulation otherwise would be
significant under DOT Regulatory Policies and Procedures, a final
regulatory evaluation will be prepared and placed in the Rules Docket.
A copy of it, if filed, 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:
99-09-52 Bombardier, Inc. (Formerly Canadair): Amendment 39-11170.
Docket 99-NM-99-AD.
Applicability: Model CL-600-2B19 (Regional Jet Series 100)
series airplanes, serial numbers 7003 through 7067 inclusive, and
7069 through 7303 inclusive; and Model CL-600-2B16 (CL-601-3R and
CL-604) series airplanes, serial numbers 5135 through 5194
inclusive, and 5301 through 5408 inclusive; certificated in any
category.
[[Page 26655]]
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 (g) 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 detect and correct concurrent chafing of both the fuel
manifold and the integrated drive generator (IDG) wire and
subsequent leakage of fuel, which could come in contact with live
wiring and result in fire or explosion, accomplish the following:
(a) For Model CL-600-2B19 (Regional Jet Series 100) series
airplanes: Within 50 flight hours or 7 days after the effective date
of this AD, whichever occurs first, perform a one-time visual
inspection of the IDG cables in the right engine nacelle to verify
clearances and detect damage, in accordance with Canadair Alert
Service Bulletin A601R-24-095, Revision `A,' dated March 25, 1999.
(1) If no damage is detected and all clearances are within the
limits specified by the alert service bulletin, submit a report in
accordance with the requirements of paragraph (f) of this AD.
(2) If any damage is detected and the inner core is not visible,
accomplish either paragraph (a)(2)(i) or (a)(2)(ii) of this AD.
(i) Prior to further flight, repair the cable jacket in
accordance with the alert service bulletin; and, within 4,000 flight
hours after accomplishing the repair, replace the cable with a new
cable; in accordance with the alert service bulletin. Or
(ii) Prior to further flight, replace the cable with a new
cable, in accordance with the alert service bulletin.
(3) If any damage is detected and the inner core is visible,
prior to further flight, replace the cable with a new cable in
accordance with the alert service bulletin.
(b) For Model CL-600-2B19 (Regional Jet Series 100) series
airplanes: Within 50 flight hours or 7 days after the effective date
of this AD, whichever occurs first, perform a one-time visual
inspection of both the left and right engine nacelles to detect
chafing of the area surrounding the 10th stage bleed air check valve
and the top and bottom pigtails of the fuel manifold, in accordance
with Canadair Alert Service Bulletin A601R-73-008, Revision ``A,''
dated April 10, 1999.
(1) If no damage is detected, prior to further flight, measure
the clearance between the right fuel manifold pigtails and the
adjacent 10th stage bleed air check valve.
(i) If the clearance is within the limits specified by the alert
service bulletin, submit a report in accordance with the
requirements of paragraph (f) of this AD.
(ii) If the clearance is outside the limits specified by the
alert service bulletin, prior to further flight, reposition the fuel
manifold or install shims, as applicable, in accordance with ``Part
B--Repositioning of the fuel manifold to set the gap'' of the
Accomplishment Instructions of the alert service bulletin.
(2) If any damage is detected, prior to further flight, repair
the fuel manifold or replace the manifold with a new manifold, as
applicable, in accordance with ``Part C--Repair or replacement'' of
the Accomplishment Instructions of the alert service bulletin.
Note 2: Accomplishment of the actions specified by Canadair
Alert Service Bulletin A601R-73-008, dated April 1, 1999, is
considered acceptable for compliance with the requirements of
paragraph (b) of this AD.
(c) For Model CL-600-2B16 (CL-601-3R and CL-604) series
airplanes: Within 50 flight hours or 7 days after the effective date
of this AD, perform a one-time visual inspection of the IDG cable
harness in the right engine nacelle to verify clearances and detect
damage, in accordance with Bombardier Alert Service Bulletin A601-
0524 or A604-73-001, both dated April 19, 1999, as applicable.
(1) If no damage is detected, submit a report in accordance with
the requirements of paragraph (f) of this AD.
(2) If any clearance is outside the limits specified in the
applicable alert service bulletin, prior to further flight, adjust
the clearance in accordance with the applicable alert service
bulletin.
(3) If any damage is detected and the inner core is not visible,
prior to further flight, repair the cable in accordance with the
applicable alert service bulletin.
(4) If any damage is detected to the cable jacket and the inner
core is visible, prior to further flight, accomplish either
paragraph (c)(4)(i) or (c)(4)(ii) of this AD.
(i) Repair the cable jacket in accordance with the alert service
bulletin; and, within 300 flight hours after accomplishing the
repair, replace the cable with a new cable; in accordance with the
applicable alert service bulletin. Or
(ii) Replace the cable with a new cable, in accordance with the
applicable alert service bulletin.
(d) For Model CL-600-2B16 (CL-601-3R and CL-604) series
airplanes: Within 50 flight hours or 7 days after the effective date
of this AD, perform a one-time visual inspection of both the left
and right engine nacelles of the area surrounding the 10th stage
bleed air check valve and the top and bottom pigtails of the fuel
manifold to verify clearances and detect chafing, in accordance with
Bombardier Alert Service Bulletin A601-0524 or A604-73-001, both
dated April 19, 1999, as applicable.
(1) If the clearances are within the limits specified in the
alert service bulletin, submit a report in accordance with the
requirements of paragraph (f) of this AD.
(2) If any clearance is outside the limits specified in the
alert wire, prior to further flight, adjust the clearance or add
spacers, as applicable, in accordance with the applicable alert
service bulletin.
(3) If any chafing is detected, prior to further flight, repair
the manifold or replace the manifold with a new manifold, as
applicable, in accordance with the applicable alert service
bulletin.
Note 3: Accomplishment of the actions specified by Bombardier
Alert Wire TA601-055, dated March 31, 1999, is considered acceptable
for compliance with the requirements of paragraphs (c) and (d) of
this AD.
(e) If any alert service bulletin referenced in this AD
specifies that the manufacturer may be contacted for accomplishment
of certain repair conditions, those repairs must be accomplished in
accordance with a method approved by the Manager, New York Aircraft
Certification Office (ACO), FAA, Engine and Propeller Directorate;
or Transport Canada Aviation (or its designee).
(f) Submit a report of all inspection findings and any repairs
performed to the local Bombardier field representative; or to either
Mr. Denis Methot (fax 514-855-8501) or Mr. Richard Moore (fax 514-
855-7708), Bombardier Aerospace Regional Aircraft, 123 Garratt
Boulevard, Downsview, Ontario, Canada M3K 1Y5; at the applicable
time specified in paragraph (f)(1) or (f)(2) of this AD. The report
must include the inspection results, a description of any
discrepancies found, the airplane serial number, and the number of
landings and flight hours on the airplane. Information collection
requirements contained in this regulation have been approved by the
Office of Management and Budget (OMB) under the provisions of the
Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and have
been assigned OMB Control Number 2120-0056.
(1) For airplanes on which the inspections are accomplished
after the effective date of this AD: Submit the report within 10
days after performing the inspections required by this AD.
(2) For airplanes on which the inspections have been
accomplished prior to the effective date of this AD: Submit the
report within 10 days after the effective date of this AD.
Alternative Methods of Compliance
(g) 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 4: 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
(h) 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
(i) Except as provided by paragraphs (e) and (f) of this AD, the
actions shall be done in accordance with Canadair Alert Service
Bulletin A601R-24-095, Revision `A,' dated
[[Page 26656]]
March 25, 1999; Canadair Alert Service Bulletin A601R-73-008,
Revision `A,' dated April 10, 1999; Bombardier Alert Service
Bulletin A601-0524, dated April 19, 1999; and Bombardier Alert
Service Bulletin A604-73-001, dated April 19, 1999; 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 5: The subject of this AD is addressed in Canadian
airworthiness directive CF-99-09, dated April 6, 1999.
(j) This amendment becomes effective on May 24, 1999, to all
persons except those persons to whom it was made immediately
effective by emergency AD 99-09-52, issued April 20, 1999, which
contained the requirements of this amendment.
Issued in Renton, Washington, on May 7, 1999.
D.L. Riggin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 99-12099 Filed 5-14-99; 8:45 am]
BILLING CODE 4910-13-U
