DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2025-0747; Project Identifier MCAI-2024-00318-T]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12
(601), and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes.
This proposed AD was prompted by tail strikes that occurred during
landing with partial flap configurations. This proposed AD would
require revising the existing airplane flight manual (AFM) to provide
the flightcrew with procedures to follow when landing under certain
conditions. The FAA is proposing this AD to address the unsafe
condition on these products.

DATES: The FAA must receive comments on this proposed AD by June 20, 2025.

ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:

Federal eRulemaking Portal: Go to regulations.gov. Follow
the instructions for submitting comments.

Fax: 202-493-2251.

Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590.

Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.

AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2025-0747; or in person at Docket Operations between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD
docket contains this NPRM, the mandatory continuing airworthiness
information (MCAI), any comments received, and other information. The
street address for Docket Operations is listed above.

Material Incorporated by Reference:

For Bombardier and Canadair material identified in this
proposed AD, contact Bombardier Business Aircraft Customer Response
Center, 400 Cote-Vertu Road West, Dorval, Quebec H4S 1Y9,
Canada; telephone 514-855-2999; email ac.yul@aero.bombardier.com;
website bombardier.com.

You may view this material at the FAA, Airworthiness
Products Section, Operational Safety Branch, 2200 South 216th St., Des
Moines, WA. For information on the availability of this material at the
FAA, call 206-231-3195.

FOR FURTHER INFORMATION CONTACT: Fatin Saumik, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7300; email 9-avs-nyaco-cos@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include "Docket No. FAA-2025-0747;
Project Identifier MCAI-2024-00318-T" at the beginning of your
comments. The most helpful comments reference a specific portion of the
proposal, explain the reason for any recommended change, and include
supporting data. The FAA will consider all comments received by the
closing date and may amend the proposal because of those comments.

Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
regulations.gov, including any personal information you provide. The
agency will also post a report summarizing each substantive verbal
contact received about this NPRM.

Confidential Business Information

CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this NPRM contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this NPRM, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as "PROPIN." The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this NPRM. Submissions containing CBI should be sent to Fatin
Saumik, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7300; email 9-avs-nyaco-cos@faa.gov. Any
commentary that the FAA receives which is not specifically designated as CBI
will be placed in the public docket for this rulemaking.

Background

Transport Canada, which is the aviation authority for Canada, has
issued Transport Canada AD CF-2024-19, dated May 30, 2024 (Transport
Canada AD CF-2024-19) (also referred to after this as the MCAI), to
correct an unsafe condition on certain Bombardier, Inc., Model CL-600-
1A11 (600), CL-600-2A12 (601), and CL-600-2B16 (601-3A, 601-3R, and 604
Variants) airplanes. The MCAI states two tail strikes occurred during
landing with partial flap configurations. Ensuing investigations
concluded the amount of nose-down elevator input applied following
touchdown was not enough to maintain the nose landing gear on the
ground when thrust reversers were deployed. This tendency for nose-up
pitching at high power settings is controllable with elevator and may
be minimized by ensuring several actions like nose-down elevator and
brake application before deploying thrust reversers.

The FAA is proposing this AD to address, through improved AFM
procedures, an inadequate amount of nose-down elevator input applied
following touchdown, which could
cause the inability to maintain the nose landing gear on the ground
when thrust reversers are deployed. The unsafe condition, if not
addressed, could result in tail strikes.

You may examine the MCAI in the AD docket at regulations.gov under
Docket No. FAA-2025-0747.

Material Incorporated by Reference Under 1 CFR Part 51

The FAA reviewed the following revisions of the AFM that provide
procedures that improve the existing guidance to further reduce the
risk of a tail strike on landing. The procedures include steps to set
flight spoilers to max, apply moderate or greater breaking, and perform
other actions to help keep the nose down and reduce the risk of tail
strikes by increasing drag and reducing lift. These documents are
distinct since they apply to different airplane models and
configurations.

Abnormal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1A-1 (U.S.), Revision 85, dated
January 25, 2024. (Including procedures for: Failure of System No. 1,
Failure of System No. 2, Failure of Systems No. 1 and No. 2, Failure of
Systems No 1. and No. 3, Failure of Systems No. 2 and No. 3, Engine
Failure During Approach, Single Engine Approach and Landing, Ice
Dispersal Procedure, Wing Flap System Malfunction, Ground Spoiler
System Malfunction, Pitch Trim Channel 1 and Channel 2 Failure,
Excessive Pitch Trim Rate, Pitch Trim Runaway, Fuel Leak, Yaw Damper
Failure, and Thrust Reverser Unlocked.)

Abnormal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1B-1 (U.S.), Revision 87, dated
January 25, 2024. (Including procedures for: Engine Failure During
Approach, Single Engine Approach and Landing, Ice Dispersal Procedure,
Wing Flap System Malfunction, Ground Spoiler System Malfunction, Pitch
Trim Single Channel Failure, Excessive Pitch Trim Rate, Pitch Trim
Runaway, Fuel Leak, Failure of System No. 1, Failure of System No. 2,
Failure of Systems No 1. and No. 2, Failure of Systems No. 1 and No. 3,
Failure of Systems No. 2 and No. 3, Yaw Damper Failure, and Thrust
Reverser Unlocked.)

Abnormal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601A-1-1, Revision 98, dated January
25, 2024. (Including procedures for: Engine Failure During Approach,
Single Engine Approach and Landing, Ice Dispersal Procedure, Wing Flap
System Malfunction, Ground Spoiler System Malfunction, Pitch Trim
Channel 1 and Channel 2 Failure, Excessive Pitch Trim Rate, Pitch Trim
Runaway, Fuel Leak, Failure of System No. 1, Failure of System No. 2,
Failure of Systems No 1. and No. 2, Failure of Systems No. 1 and No. 3,
Failure of Systems No. 2 and No. 3, Yaw Damper Failure, and Thrust
Reverser Unlocked.)

Chapter 5--Abnormal Procedures, Bombardier Challenger 604
AFM, Publication No. PSP 604-1, Revision 131, dated September 5, 2023.
(Including procedures for: Thrust Lever Inoperative, Engine Failure
During Approach, Single Engine Approach and Landing, Double Yaw Damper
Failure, Flaps Failure, Ground Spoilers Failure, Ground Spoilers
Unsafe, Ground Spoilers Deployed During Flight, Stabilizer Trim
Failure, Aileron PCU Malfunction, Elevator System Malfunction,
Excessive Fuel Load-Aux Tank, Fuel Leak Procedure, System No. 1
Failure, System No. 1 and No. 2 Failure, System No. 2 and No. 3
Failure, System No. 1 and No. 3 Failure, Ice Dispersal Procedure, Nose
Wheel Steering System Failure, Weight-on-Wheels Output Fault, and
Proximity Sensing System Failure (Total System Shutdown).) (For
obtaining the procedures for Bombardier Challenger 604 AFM, Publication
No. No. PSP 604-1, use Document Identification No. CH 604 AFM.)

Supplement 4 Category II Operations, Bombardier Challenger
604 AFM, Publication No. PSP 604-1, Revision 131, dated September 5,
2023. (Including the Engine Failure During Final Approach procedure.)
(For obtaining the procedures for Bombardier Challenger 604 AFM,
Publication No. No. PSP 604-1, use Document Identification No. CH 604 AFM.)

Chapter 5--Abnormal Procedures, Bombardier Challenger 605
AFM, Publication No. PSP 605-1, Revision 69, dated September 5, 2023.
(Including procedures for: Thrust Lever Inoperative, Engine Failure
During Approach, Single Engine Approach and Landing, Double Yaw Damper
Failure, Flaps Failure, Ground Spoilers Unsafe, Ground Spoilers
Deployed During Flight, Stabilizer Trim Failure, Aileron PCU
Malfunction, Elevator System Malfunction, Excessive Fuel Load--Aux
Tank, Fuel Leak Procedure, System No 1. Failure, System No. 1 and No. 2
Failure, System No. 2 and No. 3 Failure, System No. 1 and No. 3.
Failure, Ice Dispersal Procedure, and Proximity Sensing System Failure
(Total System Shutdown).) (For obtaining the procedures for Bombardier
Challenger 605 AFM, Publication No. No. PSP 605-1, use Document
Identification No. CH 605 AFM.)

Abnormal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 600-1 (US), Revision 109, dated January
25, 2024. (Including procedures for: Engine Failure During Approach,
Single Engine Approach and Landing, Ice Dispersal, Wing Flap System
Malfunction, Ground Spoiler System Malfunction, Pitch Trim Channel 1
and Channel 2 Failure, Excessive Pitch Trim Rate, Pitch Trim Runaway,
Fuel Leak, Failure of System No. 1, Failure of System No. 2, Failure of
Systems No. 1 and No. 2, Failure of Systems No. 1 and No. 3, Failure of
Systems No. 2 and No. 3, Yaw Damper Failure; and Thrust Reverser
Unlocked.)

Abnormal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1A (U.S.), Revision 126, dated
January 25, 2024. (Including procedures for: Failure of System No. 1,
Failure of System No. 2, Failure of Systems No. 1 and No. 2, Failure of
Systems No. 1 and No. 3, Failure of Systems No. 2 and No. 3, Engine
Failure During Approach, Single Engine Approach and Landing, Ice
Dispersal, Wing Flap System Malfunction, Ground Spoiler System
Malfunction, Pitch Trim Channel 1 and Channel 2 Failure, Excessive
Pitch Trim Rate, Pitch Trim Runaway, Fuel Leak, Yaw Damper Failure,
Thrust Reverser Unlocked.)

Abnormal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1B (U.S.), Revision 89, dated
January 25, 2024. (Including procedures for: Engine Failure During
Approach, Single Engine Approach and Landing, Ice Dispersal Procedure,
Wing Flap System Malfunction, Ground Spoiler System Malfunction, Pitch
Trim Channel 1 and Channel 2 Failure, Excessive Pitch Trim Rate, Pitch
Trim Runaway, Fuel Leak, Failure of System No. 1, Failure of System No.
2, Failure of Systems No 1. and No. 2, Failure of Systems No. 1 and No.
3, Failure of Systems No. 2 and No. 3, Yaw Damper Failure, and Thrust
Reverser Unlocked.)

Abnormal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601A-1, Revision 109, dated January 25,
2024. (Including procedures for: Engine Failure During Approach, Single
Engine Approach and Landing, Ice Dispersal Procedure, Wing Flap System
Malfunction, Ground Spoiler System Malfunction, Pitch Trim Channel 1
and Channel 2 Failure, Excessive Pitch Trim Rate, Pitch Trim Runaway,
Fuel Leak, Failure of System No. 1, Failure of System No. 2, Failure of
Systems No 1. and No. 2, Failure of Systems No. 1 and No. 3, Failure of Systems No. 2
and No. 3, Yaw Damper Failure, and Thrust Reverser Unlocked.)

Chapter 5--Abnormal Procedures, Challenger 650 AFM,
Publication PSP No. 650-1, Revision 34, dated September 5, 2023.
(Including procedures for: Thrust Reverser Inoperative, Engine Failure
During Approach, Single Engine Approach and Landing, Double Yaw Damper
Failure, Flaps Failure, Ground Spoilers Unsafe, Ground Spoilers
Deployed During Flight, Stabilizer Trim Failure, Aileron PCU
Malfunction, Elevator System Malfunction, Excessive Fuel Load--Aux
Tank, Fuel Leak Procedure, System No. 1 Failure, System No. 1 and No. 2
Failure, System No 2. and No. 3 Failure, System No. 1 and No. 3
Failure, Ice Dispersal Procedure, and Proximity Sensing System Failure
(Total System Shutdown).) (For obtaining the procedures for Bombardier
Challenger 650 AFM, Publication No. No. PSP 650-1, use Document
Identification No. CH 650 AFM.)

Emergency Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1A-1 (U.S.), Revision 85, dated
January 25, 2024. (Including procedures for: Inadvertent Thrust
Reverser Deployment in Flight, Smoke/Fire/Fumes Procedure, Smoke or
Fumes Removal Procedure, Loss of All Normal Generated Electrical Power,
Pitch Control System Jammed, Roll Control System Jammed, Rudder Control
System Jammed, Yaw Damper Failure, and Anti-Ice, Wing Duct Failure.)

Emergency Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1B-1 (U.S.), Revision 87, dated
January 25, 2024. (Including procedures for: Inadvertent Thrust
Reverser Deployment in Flight, Smoke/Fire/Fumes Procedure, Smoke or
Fumes Removal Procedure, Loss of All Normal Generated Electrical Power,
Pitch Control System Jammed, Roll Control System Jammed, Rudder Control
System Jammed, Yaw Damper Failure, and Anti-Ice, Wing Duct Failure.)

Emergency Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601A-1-1, Revision 98, dated January
25, 2024. (Including procedures for: Inadvertent Thrust Reverser
Deployment in Flight, Smoke/Fire/Fumes Procedure, Smoke or Fumes
Removal Procedure, Loss of All Normal Generated Electrical Power, Pitch
Control System Jammed, Roll Control System Jammed, Rudder Control
System Jammed, and Anti-Ice, Wing Duct Failure.)

Chapter 3--Emergency Procedures, Bombardier Challenger 604
AFM, Publication No. PSP 604-1, Revision 131, dated September 5, 2023.
(Including procedures for: Double Engine Failure, Uncommanded Thrust
Reverser Deployment, Smoke/Fire/Fumes Procedure, Smoke or Fumes Removal
Procedure, Uncommanded Yaw Motion, Loss of All Normal Electrical Power,
Aileron System Jammed, Elevator System Jammed, Rudder System Jammed,
Stabilizer Trim Runaway, and Fuselage/Wing Anti-Ice Duct Failure.) (For
obtaining the procedures for Bombardier Challenger 604 AFM, Publication
No. No. PSP 604-1, use Document Identification No. CH 604 AFM.)

Chapter 3--Emergency Procedures, Bombardier Challenger 605
AFM, Publication No. PSP 605-1, Revision 69, dated September 5, 2023.
(Including procedures for: Double Engine Failure, Uncommanded Thrust
Reverser Deployment, Smoke/Fire/Fumes Procedure, Smoke or Fumes Removal
Procedure, Uncommanded Yaw Motion, Loss of All Normal Electrical Power,
Aileron System Jammed, Elevator System Jammed, Rudder System Jammed,
Stabilizer Trim Runaway, and Fuselage/Wing Anti-Ice Duct Failure.) (For
obtaining the procedures for Bombardier Challenger 605 AFM, Publication
No. No. PSP 605-1, use Document Identification No. CH 605 AFM.)

Emergency Procedures section, Canadair Challenger AFM,
Product Publication No. 600 (U.S.), Revision A117, dated January 25,
2024. (Including procedures for: Inadvertent Thrust Reverser Deployment
in Flight, Smoke/Fire/Fumes Procedure, Smoke or Fumes Removal
Procedure, Loss of All Normal Generated Electrical Power, Pitch Control
System Jammed, Roll Control System Jammed, Rudder Control System
Jammed, Yaw Damper Failure, and Wing Anti-Ice Duct Failure.)

Emergency Procedures section, Canadair Challenger AFM,
Product Support Publication No. 600-1 (US), Revision 109, dated January
25, 2024. (Including procedures for: Inadvertent Thrust Reverser
Deployment in Flight, Smoke/Fire/Fumes Procedure, Smoke or Fumes
Removal Procedure, Loss of All Normal Generated Electrical Power, Pitch
Control System Jammed, Roll Control System Jammed, Rudder Control
System Jammed, Yaw Damper Failure, and Wing Anti-Ice Duct Failure.)

Emergency Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1A (U.S.), Revision 126, dated
January 25, 2024. (Including procedures for: Inadvertent Thrust
Reverser Deployment in Flight, Smoke/Fire/Fumes Procedure, Smoke or
Fumes Removal Procedure, Loss of All Normal Generated Electrical Power,
Pitch Control System Jammed, Roll Control System Jammed, Rudder Control
System Jammed, Yaw Damper Failure, and Anti-Ice, Wing Duct Failure.)

Emergency Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1B (U.S.), Revision 89, dated
January 25, 2024. (Including procedures for: Inadvertent Thrust
Reverser Deployment in Flight, Smoke/Fire/Fumes Procedure, Smoke or
Fumes Removal Procedure, Loss of All Normal Generated Electrical Power,
Pitch Control System Jammed, Roll Control System Jammed, Rudder Control
System Jammed, Yaw Damper Failure, and Anti-Ice, Wing Duct Failure.)

Emergency Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601A-1, Revision 109, dated January 25,
2024. (Including procedures for: Inadvertent Thrust Reverser Deployment
in Flight, Smoke/Fire/Fumes Procedure, Smoke or Fumes Removal
Procedure, Loss of All Normal Generated Electrical Power, Pitch Control
System Jammed, Roll Control System Jammed, Rudder Control System
Jammed, Yaw Damper Failure, and Anti-Ice, Wing Duct Failure.)

Chapter 3--Emergency Procedures, Challenger 650 AFM,
Publication No. PSP 650-1, Revision 34, dated September 5, 2023.
(Including procedures for: Double Engine Failure, Uncommanded Thrust
Reverser Deployment, Smoke/Fire/Fumes Procedure, Smoke or Fumes Removal
Procedure, Uncommanded Yaw Motion, Loss of All Normal Electrical Power,
Aileron System Jammed, Elevator System Jammed, Rudder System Jammed,
Stabilizer Trim Runaway, and Fuselage/Wing Anti-Ice Duct Failure.) (For
obtaining the procedures for Bombardier Challenger 650 AFM, Publication
No. No. PSP 650-1, use Document Identification No. CH 650 AFM.)

Normal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1A-1 (U.S.), Revision 85, dated
January 25, 2024. (Including the Landing Procedure.)

Normal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1B-1 (U.S.), Revision 87, dated
January 25, 2024. (Including the Landing Procedure.)

Normal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601A-1-1, Revision 98, dated January
25, 2024. (Including the Landing Procedure.)

Supplement 4, Category II Operations, Bombardier
Challenger 605 AFM, Publication No. PSP 605-1, Revision 69, dated
September 5, 2023. (Including the Engine Failure During Final Approach
procedure.) (For obtaining the procedures for Bombardier Challenger 605
AFM, Publication No. No. PSP 605-1, use Document Identification No. CH
605 AFM.)

Normal Procedures section, Canadair Challenger AFM,
Product Publication No. 600 (U.S.), Revision A117, dated January 25,
2024. (Including the Landing Procedure.)

Normal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 600-1 (US), Revision 109, dated January
25, 2024. (Including the Landing Procedure.)

Normal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1A (U.S.), Revision 126, dated
January 25, 2024. (Including the Landing Procedure.)

Normal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601-1B (U.S.), Revision 89, dated
January 25, 2024. (Including the Landing Procedure.)

Normal Procedures section, Canadair Challenger AFM,
Product Support Publication No. 601A-1, Revision 109, dated January 25,
2024. (Including the Landing Procedure.)

Supplement 4 Category II Operations, Challenger 650 AFM,
Publication No. PSP 650-1, Revision 34, dated September 5, 2023.
(Including the Engine Failure During Final Approach procedure.) (For
obtaining the procedures for Bombardier Challenger 650 AFM, Publication
No. No. PSP 650-1, use Document Identification No. CH 650 AFM.)

This material 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.

FAA's Determination

This product has been approved by the aviation authority of another
country and is approved for operation in the United States. Pursuant to
the FAA's bilateral agreement with this State of Design Authority, it
has notified the FAA of the unsafe condition described in the MCAI and
material referenced above. The FAA is issuing this NPRM after
determining that the unsafe condition described previously is likely to
exist or develop on other products of the same type design.

Proposed AD Requirements in This NPRM

This proposed AD would require revising the existing AFM to provide
strengthened procedures to further reduce the risk of a tail strike on
landing.

Compliance With AFM Revisions

Transport Canada AD CF-2024-19 requires operators to "advise all
flight crews of the changes introduced by the AFM revisions to the AFM
and thereafter operate the airplane accordingly." However, this
proposed AD would not specifically require those actions as those
actions are already required by FAA regulations. FAA regulations
require that operators furnish to pilots any changes to the AFM (for
example, 14 CFR 121.137), and to ensure the pilots are familiar with
the AFM (for example, 14 CFR 91.505). As with any other flightcrew
training requirement, training on the updated AFM content is tracked by
the operators and recorded in each pilot's training record, which is
available for the FAA to review. FAA regulations also require pilots to
follow the procedures in the existing AFM including all updates.

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would
affect 420 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:

Estimated Costs for Required Actions

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.

The FAA is 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 rulemaking action.

Regulatory Findings

The FAA determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD 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.

For the reasons discussed above, I certify this proposed regulation:

(1) Is not a "significant regulatory action" under Executive Order 12866,

(2) Would not affect intrastate aviation in Alaska, and

(3) Would 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
reference, Safety.

The Proposed Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 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
directive: