[Federal Register: October 14, 2003 (Volume 68, Number 198)]
[Rules and Regulations]
[Page 59104-59106]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr14oc03-9]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2001-NE-21-AD; Amendment 39-13337; AD 2003-05-10R1]
RIN 2120-AA64
Airworthiness Directives; General Electric Company CF34-3A1, -3B,
and -3B1 Turbofan Engines
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
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SUMMARY: This amendment revises an existing airworthiness directive
(AD), that applies to General Electric Company (GE) CF34-3A1, -3B, and
-3B1 turbofan engines with scavenge screens part numbers (P/Ns)
4047T95P01 and 5054T86G02 installed in the B-sump oil scavenge system.
That AD currently requires initial and repetitive visual inspections
and cleaning of the B-sump scavenge screens until a screenless fitting
is installed. This amendment requires the same initial and repetitive
visual inspections and cleaning of the B-sump scavenge screens until a
screenless fitting is installed. This amendment also corrects a
typographical error, and introduces a less restrictive terminating
action schedule. This amendment is prompted by the need to correct a
typographical error and by the need to introduce a less restrictive
terminating action schedule. We are issuing this AD to prevent B-sump
scavenge screen blockage due to coking which could result in ignition
of B-sump oil in the secondary air system, fan drive shaft separation,
and uncontained engine failure.
DATES: Effective November 18, 2003. The incorporation by reference of
certain publications, listed in the regulations, was approved
previously by the Director of the Federal Register as of April 2, 2003
(68 FR 12806; March 18, 2003).
ADDRESSES: The service information referenced in this AD may be
obtained from GE Aircraft Engines, 1000 Western
[[Page 59105]]
Avenue, Lynn, MA 01910; Attention: CF34 Product Support Engineering,
Mail Zone: 34017; telephone (781) 594-6323; fax (781) 594-0600. This
information may be examined, by appointment, at the Federal Aviation
Administration (FAA), New England Region, Office of the Regional
Counsel, 12 New England Executive Park, Burlington, MA; or at the
Office of the Federal Register, 800 North Capitol Street, NW., suite
700, Washington, DC.
FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aerospace Engineer,
Engine Certification Office, FAA, Engine and Propeller Directorate, 12
New England Executive Park, Burlington, MA 01803-5299; telephone (781)
238-7146; fax (781) 238-7199.
SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal
Aviation Regulations (14 CFR part 39) by revising AD 2003-05-10,
Amendment 39-13086 (68 FR 12806, March 18, 2003), which applies to GE
CF34-3A1, -3B, and -3B1 turbofan engines with scavenge screens P/Ns
4047T95P01 and 5054T86G02 installed in the B-sump oil scavenge system
was published in the Federal Register on July 8, 2003 (68 FR 40573).
That action proposed to require the same initial and repetitive visual
inspections and cleaning of the B-sump scavenge screens until a
screenless fitting is installed as in AD 2003-05-10. That action also
proposed to correct a typographical error, and introduces a less
restrictive terminating action schedule in accordance with GE Alert
Service Bulletin (ASB) CF34-AL S/B 79-A0014, Revision 3, dated January
31, 2003; ASB CF34-BJ S/B 79-A0015, Revision 3, dated January 31, 2003;
GE ASB CF34-AL S/B 79-A0016 and ASB CF34-BJ S/B 79-A0017, both dated
June 17, 2002.
Comments
Interested persons have been afforded an opportunity to participate
in the making of this amendment. No comments were received on the
proposal or the FAA's determination of the cost to the public. The FAA
has determined that air safety and the public interest require the
adoption of the rule as proposed.
Regulatory Analysis
This final rule does not have federalism implications, as defined
in Executive Order 13132, because it would 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. Accordingly,
the FAA has not consulted with state authorities prior to publication
of this final rule.
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 the 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
by contacting 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 39-13086 (68 FR
12806, March 18, 2003) and by adding a new airworthiness directive,
Amendment 39-13337, to read as follows:
2003-05-10R1 General Electric Company: Amendment 39-13337. Docket
No. 2001-NE-21-AD. Revises AD 2003-05-10, Amendment 39-13086.
Applicability
This airworthiness directive (AD) applies to General Electric
Company (GE) CF34-3A1, -3B, and -3B1 turbofan engines with scavenge
screens part numbers (P/Ns) 4047T95P01 and 5054T86G02 installed in
the B-sump oil scavenge system. These engines are installed on, but
not limited to, Bombardier Inc. (Canadair) Model CL-600-2A12, CL-
600-2B16, and CL-600-2B19 airplanes.
Note 1: This AD applies to each engine 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 engines 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 (d) 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
Compliance with this AD is required as indicated, unless already
done.
To prevent B-sump scavenge screen blockage due to coking, which
could result in ignition of B-sump oil in the secondary air system,
fan drive shaft separation, and uncontained engine failure, do the
following:
Initial Inspection and Cleaning of B-Sump Screens
(a) Perform an initial visual inspection and cleaning of
scavenge screens, P/Ns 4047T95P01 and 5054T86G02, installed in the
B-sump oil scavenge system, in accordance with Paragraphs 3A through
3B of the Accomplishment Instructions of GE Aircraft Engines (GE)
Alert Service Bulletin (ASB) CF34-AL S/B 79-A0014, Revision 3, dated
January 31, 2003; or ASB CF34-BJ S/B 79-A0015, Revision 3, dated
January 31, 2003; and the following table:
Initial Inspection and Cleaning Schedule
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Engine hours time-since-new (TSN) or time-
since-last-shop-visit (TSLSV) Inspect and clean
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(1) Fewer than 4,000 hours TSN or fewer Before 4,000 hours TSN or
than 4,000 hours TSLSV if it can be TSLSV.
confirmed that both the B-sump scavenge
screens were cleaned and the B-sump and
combustor frame (strut tubes) were
removed from the engine and cleaned at
that prior shop visit.
(2) Fewer than 1,000 hours TSLSV if it can Before 1,000 hours TSLSV.
NOT be confirmed that both the B-sump
scavenge screens were cleaned and the B-
sump and combustor frame (strut tubes)
were removed from the engine and cleaned
at that prior shop visit.
[[Page 59106]]
(3) 4,000 hours or greater TSN or 4,000 Within 500 hours time-in-
hours or greater TSLSV if it can be service (TIS) after the
confirmed that both the B-sump scavenge effective date of this AD.
screens were cleaned and the B-sump and
combustor frame (strut tubes) were
removed from the engine and cleaned at
that prior shop visit, or 1,000 hours or
greater TSLSV if it can NOT be confirmed
that both the B-sump and combustor frame
(strut tubes) were removed from the
engine and cleaned at that prior shop
visit.
------------------------------------------------------------------------
Repetitive Inspections and Cleaning
(b) Perform repetitive visual inspections and cleaning of
scavenge screens, P/Ns 4047T95P01 and 5054T86G02, installed in the
B-sump oil scavenge system, in accordance with Paragraphs 3A through
3B of the Accomplishment Instructions of GE ASB CF34-AL S/B 79-
A0014, Revision 3, dated January 31, 2003; and ASB CF34-BJ S/B 79-
A0015, Revision 3, dated January 31, 2003; and the following:
(1) At intervals not to exceed 200 hours time-since-last-
inspection (TSLI), if no coke is found in screens during initial or
any prior inspections, or
(2) At intervals not to exceed 100 hours TSLI, if coke is found
in screens during initial or any prior inspections.
Terminating Actions
(c) Install new screenless fittings or fittings that have been
reworked to remove the screens, in the B-sump oil scavenge system,
in accordance with GE ASB CF34-AL S/B 79-A0016, dated June 17, 2002;
or ASB CF34-BJ S/B 79-A0017, dated June 17, 2002, and the following
schedule:
(1) For engines with more than 4,000 hours TSN, within 500 hours
TIS after the effective date of this AD, or within 1,000 hours
TSLSV, whichever occurs first.
(2) For engines with less than or equal to 4,000 hours TSN,
prior to 4,500 hours TSN.
This constitutes terminating action to the inspections required
in paragraph (b) of this AD.
Alternative Methods of Compliance
(d) 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, Engine Certification Office (ECO).
Operators must submit their request through an appropriate FAA
Principal Maintenance Inspector, who may add comments and then send
it to the Manager, ECO.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this airworthiness directive,
if any, may be obtained from the ECO.
Special Flight Permits
(e) Special flight permits may be issued in accordance with
Sec. Sec. 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 done.
Documents That Have Been Incorporated by Reference
(f) The actions must be done in accordance with the following
General Electric Company Alert Service Bulletins (ASB):
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Document No. Pages Revision Date
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ASB CF34-AL S/B.................... All................... 3..................... January 31, 2003.
79-A0014...........................
Total Pages: 10....................
ASB CF34-BJ S/B.................... All................... 3..................... January 31, 2003.
79-A0015...........................
Total Pages: 9.....................
ASB CF34-AL S/B.................... All................... Original.............. June 17, 2002.
79-A0016...........................
Total Pages: 12....................
ASB CF34-BJ S/B.................... All................... Original.............. June 17, 2002.
79-A0017...........................
Total Pages: 11....................
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This incorporation by reference of General Electric Alert
Service Bulletin (ASB) CF34-AL S/B 79-A0014, Revision 3, dated
January 31, 2003; ASB CF34-BJ S/B 79-A0015, Revision 3, dated
January 31, 2003; GE ASB CF34-AL S/B 79-A0016 and ASB CF34-BJ S/B
79-A0017, both dated June 17, 2002, was approved by the Director of
the Federal Register on April 2, 2003, (68 FR 12086; March 18, 2003)
in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be
obtained from GE Aircraft Engines, 1000 Western Avenue, Lynn, MA
01910; Attention: CF34 Product Support Engineering, Mail Zone:
34017; telephone (781) 594-6323; fax (781) 594-0600. Copies may be
inspected at the FAA, New England Region, Office of the Regional
Counsel, 12 New England Executive Park, Burlington, MA; or at the
Office of the Federal Register, 800 North Capitol Street, NW, suite
700, Washington, DC.
Effective Date
(g) This amendment becomes effective on November 18, 2003.
Issued in Burlington, Massachusetts, on October 6, 2003.
Francis A. Favara,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 03-25864 Filed 10-10-03; 8:45 am]
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