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2022-12-12: Turbine Section

FAA order 2022-12-12 is an airworthiness directive in force since July 5, 2022. The FAA's subject line: Turbine Section. It names the Pratt & Whitney PW4062 engine: about 6 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: engine.

What it applies to as the FAA lists it

Kind of product
Engine
Makes
Pratt & Whitney Division
Models
PW4062
Engine series
Pratt & Whitney PW4062 6 aircraft

Dates and paperwork

In force since
July 5, 2022
Published
June 17, 2022 (signed June 14, 2022)
Docket
FAA-2022-0589
Status
Current
The FAA's document
Read the order on the FAA's site

The FAA's summary their words, unchanged

The FAA is adopting a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW4062 model turbofan engines. This AD was prompted by a report of a manufacturing quality escape due to insufficient cooling of the low-pressure turbine (LPT) stage 5 air seal resulting in a reduction of the low-cycle fatigue (LCF) life limit. This AD requires removal and replacement of the LPT stage 5 air seal with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.

The order itself the regulatory text, as published

Show the full text (3,112 characters)
1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2022-12-12 Pratt & Whitney Division: Amendment 39-22084; Docket No. FAA-2022-0589; Project Identifier AD-2022-00376-E. (a) Effective Date This airworthiness directive (AD) is effective July 5, 2022. (b) Affected ADs None. (c) Applicability This AD applies to Pratt & Whitney Division (PW) PW4062 model turbofan engines with an installed low-pressure turbine (LPT) stage 5 air seal, part number (P/N) 50N324, having a serial number (S/N) listed in Table 1 to paragraph (c) of this AD, installed. ER17JN22.033 (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. (e) Unsafe Condition This AD was prompted by a report of a manufacturing quality escape due to insufficient cooling of the LPT stage 5 air seal resulting in a reduction of the life of the low-cycle fatigue (LCF) life limit. The FAA is issuing this AD to prevent failure of the LPT stage 5 air seal. The unsafe condition, if not addressed, could result in the uncontained release of the LPT stage 5 air seal, 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 At the next piece-part exposure, or before the LPT stage 5 air seal accumulates 8,240 cycles since new, whichever occurs first after the effective date of this AD, remove the LPT stage 5 air seal from service and replace it with a part eligible for installation. (h) Definitions (1) For the purpose of this AD, "piece-part exposure" is when an LPT stage 5 air seal has been disassembled from the engine. (2) For the purpose of this AD, a "part eligible for installation" is an LPT stage 5 air seal, P/N 50N324, with an S/N not listed in Table 1 to Paragraph (c) of this AD. (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (j) of this AD and email to: ANE-AD-AMOC@faa.gov . (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. (j) Related Information For more information about this AD, contact Carol Nguyen, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238-7655; email: carol.nguyen@faa.gov . (k) Material Incorporated by Reference None. Issued on June 14, 2022. Christina Underwood, Acting Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022-13088 Filed 6-16-22; 8:45 am]BILLING CODE 4910-13-P

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 7, 2026. Connections as data: /graph/directive/2022-12-12.json · aircraft systems.