DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2016-9380; Directorate Identifier 2016-NE-21-AD;
Amendment 39-18857; AD 2017-08-08]
Airworthiness Directives; CFE Company Turbofan Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
SUMMARY: We are adopting a new airworthiness directive (AD) for
CFE Company (CFE) turbofan engines. This AD was prompted by a quality
escape for high-pressure compressor (HPC) impellers made from forgings
with nonconforming material grain size. This AD requires removal of the
HPC impeller. We are issuing this AD to correct the unsafe condition on
DATES: This AD is effective May 31, 2017.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of May 31,
ADDRESSES: For service information identified in this final rule,
contact CFE Company, 111 S. 34th Street, Phoenix, Arizona 85034-2802;
phone: 800-601-3099; Internet: https://www.myaerospace.com. You may
view this service information at the FAA, Engine & Propeller
Directorate, 1200 District Avenue, Burlington, MA. For information on
the availability of this material at the FAA, call 781-238-7125.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov
by searching for and locating Docket No. FAA-2016-
9380; or in person at the Docket Management Facility between 9 a.m. and
5 p.m., Monday through Friday, except Federal holidays. The AD docket
contains this AD, the regulatory evaluation, any comments received, and
other information. The address for the Docket Office (phone: 800-647-
5527) is Document Management Facility, U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Martin Adler, Aerospace Engineer,
Engine Certification Office, FAA, 1200 District Avenue, Burlington, MA
01803; phone: 781-238-7157; fax: 781-238-7199; email:
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would apply to certain CFE CFE738-1-1B
model turbofan engines with HPC impeller, part number (P/N) 6079T77P07
or P/N 6079T77P09, installed. The NPRM published in the Federal
Register on January 3, 2017 (82 FR 52). The NPRM was prompted by a
quality escape for HPC impellers made from forgings with nonconforming
material grain size. The NPRM proposed to require removal of the HPC
impeller. We are issuing this AD to correct the unsafe condition on
We gave the public the opportunity to participate in developing
this AD. We received no comments on the NPRM (82 FR 52, January 3,
2017) or on the determination of the cost to the public.
We reviewed the relevant data and determined that air safety and
the public interest require adopting this AD as proposed.
Related Service Information Under 1 CFR Part 51
We reviewed CFE Service Bulletin (SB) CFE738-72-8080, Revision 0,
dated August 18, 2016. The SB describes procedures for replacing
specific serial numbered HPC impellers, P/N 6079T77P07 or P/N
6079T77P09. This service information is reasonably available because
the interested parties have access to it through their normal course of
business or by the means identified in the ADDRESSES section.
Costs of Compliance
We estimate that this AD affects 176 engines installed on airplanes
of U.S. registry.
We estimate the following costs to comply with this AD:
|Pro-rated HPC impeller
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701: ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
This AD will not have federalism implications under Executive Order
13132. This AD 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.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
(2) Is not a ``significant rule'' under DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979),
(3) Will not affect intrastate aviation in Alaska, and
(4) 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
Adoption of the Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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. The FAA amends Sec. 39.13 by adding the following new airworthiness