2022-07-13: Engine Oil Cooler

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: 2022-07-13 Pratt & Whitney Division: Amendment 39-22001; Docket No. FAA-2022-0386; Project Identifier AD-2022-00336-E. (a) Effective Date This airworthiness directive (AD) is effective May 2, 2022. (b) Affected ADs None. (c) Applicability This AD applies to Pratt & Whitney Division PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 model turbofan engines, with an installed air/oil heat exchanger that has accumulated any number of cycles since new (CSN) or cycles since last overhaul. (d) Subject Joint Aircraft System Component (JASC) Code 7921, Engine Oil Cooler. (e) Unsafe Condition This AD was prompted by an in-flight shutdown (IFSD) of an engine due to an air/oil heat exchanger leak caused by corrosion and subsequent investigation by the manufacturer that revealed additional air/oil heat exchanger leaks on the affected engines. The FAA is issuing this AD to prevent leaks in the air/oil heat exchanger. The unsafe condition, if not addressed, could result in low oil pressure, failure of one or more engines, IFSD, loss of engine thrust control, reduced control of the airplane, and loss of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) Within 30 days prior to the first flight after the effective date of this AD, perform an inspection for leaks of the air/oil heat exchanger in accordance with the Accomplishment Instructions, paragraph 3., of Pratt & Whitney Special Instruction No. 255F-21A, dated February 15, 2022. (2) If any air/oil heat exchanger fails the inspection required by paragraph (g)(1) of this AD, before further flight, remove the air/oil heat exchanger and replace with a part eligible for installation. (h) Definition For the purpose of this AD, a "part eligible for installation" is: (1) A new air/oil heat exchanger with zero CSN, or (2) An overhauled air/oil heat exchanger with zero cycles since last overhaul, or (3) An air/oil heat exchanger that has passed the inspection required by paragraph (g)(1) of this AD. (i) Effect of Storage on Compliance Time For performance of the inspection for leaks required by paragraph (g)(1) of this AD, the air/oil heat exchanger may be inspected more than 30 days prior to the first flight after the effective date of this AD if, after performing said inspection, the following are accomplished: (1) The air/oil heat exchanger is stored in accordance with the Accomplishment Instructions, paragraph 6., of Pratt & Whitney Special Instruction No. 255F-21A, dated February 15, 2022; and (2) The cumulative time between performance of the inspection and the first flight minus the time stored in accordance with paragraph (i)(1) of this AD does not exceed 30 days. (j) Credit for Previous Actions You make take credit for the actions required by paragraph (g)(1) of this AD if the inspection for leaks was performed before the effective date of this AD using the Accomplishment Instructions, paragraph 3., of Pratt & Whitney Special Instruction No. 255F-21, dated December 22, 2021. (k) Special Flight Permit Special flight permits, as described in 14 CFR 21.197 and 21.199, are permitted prior to compliance with paragraph (g)(1) of this AD, provided that the air/oil heat exchanger has first passed an inspection, performed within 60 days of the flight, performed in accordance with: (1) The Accomplishment Instructions, paragraph 3., of Pratt & Whitney Special Instruction No. 255F-21, dated December 22, 2021, before the effective date of this AD, or (2) The Accomplishment Instructions, paragraph 3., of Pratt & Whitney Special Instruction No. 255F-21A, dated February 15, 2022. (l) 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 (m) 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. (m) 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 . (n) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Pratt & Whitney Special Instruction No. 255F-21A, dated February 15, 2022. (ii) [Reserved] (3) For service information identified in this AD, contact Pratt & Whitney Division, 400 Main Street, East Hartford, CT 06118; phone: (860) 565-0140; email: help24@prattwhitney.com; website: https://connect.prattwhitney.com. (4) You may view this service information at FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (817) 222-5110. (5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email: fr.inspection@nara.gov, or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html. Issued on March 31, 2022. Derek Morgan, Acting Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022-08045 Filed 4-14-22; 8:45 am]BILLING CODE 4910-13-P