[Federal Register Volume 59, Number 9 (Thursday, January 13, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-583]
[[Page Unknown]]
[Federal Register: January 13, 1994]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 93-NM-215-AD; Amdt. 39-8796; AD 94-01-14]
Airworthiness Directives; Canadair Model CL-600-2B19 (Regional
Jet) Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule; request for comments.
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SUMMARY: This amendment adopts a new airworthiness directive (AD) that
is applicable to certain Canadair Model CL-600-2B19 (Regional Jet)
series airplanes. This action revises the FAA-approved Airplane Flight
Manual (AFM) to require that both integrated drive generators (IDG) be
operational for dispatch. This AD also requires repetitive inspections
of the IDG oil level, and replenishing with oil, if necessary; and, for
certain airplanes, an inspection of the oil level, and replacement of
the IDG with a serviceable unit. This AD also specifies an optional
terminating action for the repetitive inspections and AFM revision.
This amendment is prompted by reports of failures of the IDG constant
speed drive (CSD) on Canadair Model CL-600-2B19 series airplanes. The
actions specified in this AD are intended to prevent loss of engine oil
and subsequent engine shutdown during flight.
DATES: Effective on January 28, 1994.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of January 28, 1994.
Comments for inclusion in the Rules Docket must be received on or
before March 14, 1994.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-103,
Attention: Rules Docket No. 93-NM-215-AD, 1601 Lind Avenue SW., Renton,
Washington 98055-4056.
The service information referenced in this AD may be obtained from
Bombardier, Inc., Bombardier Regional Aircraft Division, Garratt
Boulevard, Downsview, Ontario M3K 1Y5, 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, 181 South Franklin
Avenue, 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: Peter Cuneo, Electrical Engineer,
Systems and Equipment Branch, ANE-173, FAA, Engine and Propeller
Directorate, New York Aircraft Certification Office, 181 South Franklin
Avenue, Room 202, Valley Stream, New York 11581; telephone (516) 791-
6427; fax (516) 791-9024.
SUPPLEMENTARY INFORMATION: Transport Canada Aviation, which is the
airworthiness authority for Canada, recently notified the FAA that an
unsafe condition may exist on certain Canadair Model CL-600-2B19
(Regional Jet) series airplanes. Transport Canada Aviation advises that
there have been four reports of failures of the integrated drive
generator (IDG) constant speed drive (CSD) on Canadair Model CL-600-
2B19 series airplanes. One of these incidents resulted in engine
shutdown during flight. Investigation revealed that the retaining ring,
which restrains the CSD input shaft bearing, can become unseated from
its positional groove on the input shaft. This condition could result
in loss of IDG oil and subsequent disconnection of the IDG. In
addition, the input shaft could move abnormally, which could cause
damage to the engine seal. This condition, if not corrected, could
result in loss of engine oil and subsequent engine shutdown during
flight.
Bombardier Inc. has issued Canadair Regional Jet Alert Service
Bulletin S.B.A601R-24-015, Revision ``A,'' dated December 1, 1993, that
describes procedures for repetitive inspections of the IDG oil level,
and replenishing with oil, if necessary. For airplanes on which the IDG
has been disconnected during flight, the alert service bulletin
describes procedures for inspecting the oil level, and replacement of
the IDG with a serviceable unit.
The alert service bulletin also references Canadair Regional Jet
Alert Service Bulletin S.B.A601R-24-016, Revision ``A,'' dated December
3, 1993, which describes procedures for accomplishment of a
modification that would terminate the repetitive inspections and AFM
revision. The modification involves installing a new bearing retainer
and new input shaft bearings in the CSD units. Accomplishment of this
modification will eliminate the loss of IDG oil and engine oil.
Transport Canada Aviation classified these alert service bulletins
as mandatory and issued Canadian Airworthiness Directive CF-93-29,
dated December 3, 1993, in order to assure the continued airworthiness
of these airplanes in Canada.
This airplane model is manufactured in Canada and is type
certificated for operation in the United States under the provisions of
Section 21.29 of the Federal Aviation Regulations and the applicable
bilateral airworthiness agreement. Pursuant to this bilateral
airworthiness agreement, Transport Canada Aviation has kept the FAA
informed of the situation described above. The FAA has examined the
findings of Transport Canada Aviation, 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.
Since an unsafe condition has been identified that is likely to
exist or develop on other airplanes of the same type design registered
in the United States, this AD is being issued to prevent loss of engine
oil and subsequent engine shutdown during flight. This AD revises the
Limitations Section of the FAA-approved Airplane Flight Manual (AFM) to
require that both IDG's be operational for dispatch. This AD also
requires repetitive inspections of the IDG oil level, and replenishing
with oil, if necessary. Additionally, for airplanes on which the IDG
has been disconnected during flight, this AD requires replacement of
the IDG with a serviceable unit. The inspections and replacement are
required to be accomplished in accordance with Canadair Regional Jet
Alert Service Bulletin S.B.A601R-24-015, described previously.
In addition, this AD provides an optional terminating modification,
which, if accomplished, would terminate the repetitive oil level
inspections and the AFM revision.
This is considered to be interim action. The FAA is considering
further rulemaking action to require accomplishment of the optional
terminating modification specified in this AD. However, the proposed
compliance time for the modification is sufficiently long so that
notice and opportunity for public comment would not be impracticable.
Since a situation exists that requires the immediate adoption of
this regulation, it is found that notice and opportunity for prior
public comment hereon are impracticable, and that good cause exists for
making this amendment effective in less than 30 days.
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 notice must submit a self-addressed,
stamped postcard on which the following statement is made: ``Comments
to Docket Number 93-NM-215-AD.'' The postcard will be date stamped and
returned to the commenter.
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 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 14 CFR part
39 of the Federal Aviation Regulations as follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows
Authority: 49 U.S.C. App. 1354(a), 1421 and 1423; 49 U.S.C.
106(g); and 14 CFR 11.89.
Sec. 39.13 [Amended]
2. Section 39.13 is amended by adding the following new
airworthiness directive:
94-01-14 Canadair Limited: Amendment 39-8796. Docket 93-NM-215-AD.
Applicability: Model CL-600-2B19 (Regional Jet) series
airplanes, serial numbers 7003 through 7028 inclusive, certificated
in any category.
Compliance: Required as indicated, unless accomplished
previously.
To prevent loss of engine oil and subsequent engine shutdown
during flight, accomplish the following:
(a) Within 14 days after the effective date of this AD, add the
following to the Limitations Section of the FAA-approved Airplane
Flight Manual (AFM). This may be accomplished by inserting a copy of
this AD in the AFM. This AFM revision may be removed from the AFM if
the optional terminating action specified in paragraph (d) of this
AD is accomplished.
Both integrated drive generators must be operational for
dispatch. Note: This overrides the current applicable Master Minimum
Equipment List (MMEL) requirement.
(b) For airplanes on which the IDG has been disconnected during
flight: Prior to further flight, inspect the integrated drive
generator (IDG) oil level in accordance with Canadair Regional Jet
Alert Service Bulletin S.B.A601R-24-015, Revision `A,' dated
December 1, 1993.
(1) If the oil level is on or below the ``ADD'' mark, prior to
further flight, replace the IDG with a serviceable unit in
accordance with Canadair Regional Jet Alert Service Bulletin
S.B.A601R-24-015, Revision `A,' dated December 1, 1993, or modify
the IDG in accordance with Canadair Regional Jet Alert Service
Bulletin S.B.A601R-24-016, Revision `A,' dated December 3, 1993.
(2) If the oil level is above the ``ADD'' mark, replace the IDG
with a serviceable unit in accordance with Canadair Regional Jet
Alert Service Bulletin S.B.A601R-24-015, Revision `A,' dated
December 1, 1993, or modify the IDG in accordance with Canadair
Regional Jet Alert Service Bulletin S.B.A601R-24-016, Revision `A,'
dated December 3, 1993. The action shall be accomplished prior to
further flight, except that a special flight permit may be issued in
accordance with FAR 21.197 and 21.199 to operate the airplane to a
location in order to comply with the requirements of this paragraph,
provided that the IDG remains disconnected.
(c) Within 14 days after the effective date of this AD, inspect
the IDG oil level in accordance with Canadair Regional Jet Alert
Service Bulletin S.B.A601R-24-015, Revision `A,' dated December 1,
1993. If the oil level is on or below the ``ADD'' mark, prior to
further flight, replenish with oil in accordance with the service
bulletin. Repeat the inspection thereafter at intervals not to
exceed 30 hours time-in-service.
(d) Modification of the IDG in accordance with Canadair Regional
Jet Alert Service Bulletin S.B.A601R-24-016, Revision `A,' dated
December 3, 1993, constitutes terminating action for the
requirements of this AD. If this modification is accomplished, the
AFM revision required by paragraph (a) of this AD shall be removed
from the AFM.
(e) 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), ANE-170, 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: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the New York ACO.
(f) Special flight permits may be issued in accordance with FAR
21.197 and 21.199 to operate the airplane to a location where the
requirements of this AD can be accomplished.
(g) The actions shall be done in accordance with Canadair
Regional Jet Alert Service Bulletin S.B.A601R-24-015, Revision `A,'
dated December 1, 1993, and Canadair Regional Jet Alert Service
Bulletin S.B.A601R-24-016, Revision `A,' dated December 3, 1993.
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., Bombardier
Regional Aircraft Division, Garratt Boulevard, Downsview, Ontario
M3K 1Y5, 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, 181 South Franklin Avenue, Valley Stream, New
York; or at the Office of the Federal Register, 800 North Capitol
Street NW., suite 700, Washington, DC.
(h) This amendment becomes effective on January 28, 1994.
Issued in Renton, Washington, on January 5, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 94-583 Filed 1-12-94; 8:45 am]
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