Federal Register - June 11, 2021
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Source: Federal Register
31094
Federal Register / Vol. 86, No. 111 / Friday, June 11, 2021 / Rules and Regulations
aircraft that might need these replacements.
ON-CONDITION COSTS
Action
Labor cost
Replace 1st-stage LPC fan blade
4 work-hours $85 per hour = $340
Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs 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 Agencys 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.
1 Is not a significant regulatory action under Executive Order 12866, and 2 Will not affect intrastate aviation in Alaska.
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 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106g, 40113, 44701.
39.13
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:
Amended
2. The FAA amends 39.13 by:
a. Removing Airworthiness Directive 20192513, Amendment 3921011 84
FR 71770, December 30, 2019; and b. Adding the following new airworthiness directive:
20211201 Engine Alliance: Amendment 3921588; Docket No. FAA20210445;
Project Identifier AD202100268E.
a Effective Date This airworthiness directive AD is effective June 28, 2021.
Parts cost $190,000
Cost per product $190,340
b Affected ADs This AD replaces AD 20192513, Amendment 3921011 84 FR 71770, December 30, 2019.
c Applicability This AD applies to Engine Alliance EA
GP7270 and GP7277 model turbofan engines with low-pressure compressor LPC 1st-stage fan blades, part number P/N 5700531, 5702931, 5702931CL1, or 5702931CL2, installed.
d Subject Joint Aircraft System Component JASC
Code 7230, Turbine Engine Compressor Section.
e Unsafe Condition This AD was prompted by a report of an in-flight shutdown of an engine due to the fracture of multiple LPC 1st-stage fan blades.
The FAA is issuing this AD to prevent failure of the LPC 1st-stage fan blades. The unsafe condition, if not addressed, could result in uncontained fan blade release, damage to the engine, and damage to the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 Within the compliance time specified in Table 1 to paragraph g1 of this AD, perform an ultrasonic inspection of the LPC
1st-stage fan blades using the Accomplishment Instructions, For Fan Blades Installed In An Engine, paragraph 1, or For Fan Blades Not Installed In An Engine, paragraph 1, as applicable, of EA
Alert Service Bulletin SB EAGP7A72444, dated November 18, 2020.
Fan Blade Flie:ht Cvcles Fewer than 2,250 flight cycles since new CSN on the effective date of this AD.
2,250 flight CSN or greater as of the effective date of this AD, but fewer than 3,250 CSN on January 14, 2020 the effective date of AD 2019-25-13.
3,250 flight CSN or greater on January 14, 2020.
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Compliance Time Before exceeding 2,500 flight CSN.
Before exceeding 250 flight cycles from the effective date of this AD.
Within 250 flight cycles since January 14, 2020 or before further flight, whichever occurs later.
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Table 1 to Paragraph gl
