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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 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.
We prepared a summary of the costs to comply with this AD and placed it in the AD Docket.
You may get a copy of this summary at the address listed under ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
Adoption of the Amendment
Under 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:
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Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13 [Amended]
2. The FAA amends § 39.13 by adding the following new airworthiness directive:
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FAA
Aircraft Certification Service
AIRWORTHINESS DIRECTIVE
www.faa.gov/aircraft/safety/alerts/
www.gpoaccess.gov/fr/advanced.html
2009-01-01 CFM International, S. A.: Amendment 39-15779. Docket No. FAA-2008-1353;
Directorate Identifier 2008-NE-46-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective December 31, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to CFM International, S. A. CFM56-5B1, -5B2, -5B4, -5B5, -5B6, -5B7, -
5B1/P, -5B2/P, -5B3/P, -5B3/P1, -5B4/P, -5B5/P, -5B6/P, -5B7/P, -5B8/P, -5B9/P, -5B1/2P, -
5B2/2P, -5B3/2P, -5B3/2P1, -5B4/2P, -5B6/2P, -5B4/P1, -5B4/2P1, and -5B9/2P turbofan engines.
These engines are installed on, but not limited to, Airbus A318, A319, A320, and A321 series
airplanes.
Unsafe Condition
(d) This AD results from an Airbus A321 airplane powered by CFM56-5B1/P turbofan engines
experiencing high-pressure compressor (HPC) stalls during climb out after takeoff. We are issuing
this AD to prevent HPC stalls, which could prevent continued safe flight or landing.
Compliance
(e) You are responsible for having the actions required by this AD performed within the
compliance times specified unless the actions have already been done.
(f) Within 14 days of the effective date of this AD do the following:
(1) Review exhaust gas temperature (EGT) monitoring records to determine EGT deterioration
margin.
(2) For airplanes where both engines have greater than 80° centigrade (C) deterioration of EGT
margin, do the following:
(i) Borescope-inspect HPC stages 1, 3, 6, and 9 of both engines. Information on borescope
inspection of the HPC can be found in the aircraft maintenance manual.
(ii) Remove from service any engine that does not pass the borescope inspection requirements
found in the aircraft maintenance manual.
(iii) If both engines pass the borescope inspection, then remove one of the engines from service
and replace it with an engine that has 80 °C or less deterioration of EGT margin.
(3) Continue monitoring EGT margin on engines in service, to prevent two engines on an
airplane from having greater than 80 °C deterioration of EGT margin. Information on monitoring
EGT can be found in CFM International, S. A. Service Bulletin (SB) No. CFM56-5B S/B 72-0722,
dated December 22, 2008.
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Interim Actions
(g) These actions are interim actions and we anticipate further rulemaking actions in the future,
including further action to address the remaining engines in service that are above 80 °C deterioration
of EGT margin.
Alternative Methods of Compliance (AMOCs)
(h) The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for
this AD, if requested using the procedures found in 14 CFR 39.19.
Related Information
(i) Refer to MCAI EASA Airworthiness Directive 2008-0227-E, dated December 23, 2008, and
CFM International, S. A. SB No. CFM56-5B S/B 72-0722, dated December 22, 2008, for related
information.
(j) Contact CFM International, S. A., Technical Publications Department, 1 Neumann Way,
Cincinnati, OH 45215; telephone (513) 552-2800; fax (513) 552-2816, for a copy of this service
bulletin.
(k) Contact Airbus, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France, for a copy of
the aircraft maintenance manual.
(l) Contact Stephen K. Sheely, Aerospace Engineer, Engine Certification Office, FAA, Engine
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