2024-28125. Airworthiness Directives; Bombardier, Inc., Airplanes

Estimated Costs for Required Actions

Labor cost	Parts cost	Cost per product	Cost on U.S. operators
24 work-hours × $85 per hour = $2,040	$37,919	$39,959	$1,718,237

The FAA has received no definitive data on which to base the cost estimates for the repairs specified in this AD.

The FAA has included all known costs in its cost estimate. According to the manufacturer, however, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected operators.

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

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 Order 12866,

(2) Will not affect intrastate aviation in Alaska, 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.

List of Subjects in 14 CFR Part 39

• Air transportation
• Aircraft
• Aviation safety
• Incorporation by reference
• Safety

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.

( print page 95097)

§ 39.13

[Amended]

2. The FAA amends § 39.13 by adding the following new airworthiness directive:

2024-23-08 Bombardier, Inc.: Amendment 39-22887; Docket No. FAA-2024-2015; Project Identifier MCAI-2023-00769-T.

(a) Effective Date

This airworthiness directive (AD) is effective January 6, 2025.

(b) Affected ADs

None.

(c) Applicability

This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes, certificated in any category, serial numbers 9861, 9872, 60001 through 60004 inclusive, 60006 through 60023 inclusive, 60025 through 60029 inclusive, 60031, 60033 through 60036 inclusive, 60038 through 60042 inclusive, 60044, 60046 through 60048 inclusive, 60050 through 60055 inclusive, 60058 through 60060 inclusive, 60062 through 60067 inclusive, 60069 through 60071 inclusive, 60073 through 60086 inclusive, and 60088 through 60101 inclusive.

(d) Subject

Air Transport Association (ATA) of America Code 57, Wings.

(e) Unsafe Condition

This AD was prompted by reports of missing or damaged inboard flap seal plates. The FAA is issuing this AD to address the unsafe condition, which could result in the partial or total detachment of the flap seal plate. Under certain flight conditions, a missing inboard flap seal plate could lead to excessive buffeting and vibration, and consequent damage to the airplane.

(f) Compliance

Comply with this AD within the compliance times specified, unless already done.

(g) Detailed Inspection

At the applicable time specified in figure 1 to paragraph (g) of this AD, perform a detailed inspection for cracks of the attaching angles of the inboard flap seal plates, in accordance with Section 2.B. (Part A) of the Accomplishment Instructions of Bombardier Service Bulletin 700-27-5509 or 700-27-6509, both Revision 01, both dated May 5, 2023, as applicable, except do corrective actions as specified in paragraph (h) of this AD.

Figure 1 to Paragraph ( g )—Compliance Requirements

Total flight hours as of the effective date of this AD	Compliance time after the effective date of this AD
Less than or equal to 750	Within 250 flight hours.
More than 750	Within 100 flight hours.