2015-14-05: Cracking in the low-pressure turbine (LPT) shaft

Adoption of 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 0 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] 0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): 2015-14-05 Pratt & Whitney: Amendment 39-18203; Docket No. FAA-2014- 1127; Directorate Identifier 2014-NE-16-AD. (a) Effective Date This AD is effective August 25, 2015. (b) Affected ADs None. (c) Applicability This AD applies to all Pratt & Whitney (PW) JT8D-217C and JT8D- 219 turbofan engines with low-pressure turbine (LPT) shaft part numbers 783319, 783319-001, 783319-003, 783319-004, 783320, 783320- 001, 783320-003, 783320-004, 820514-001, 820514-003, 820514-004, or 820514-005, installed. (d) Unsafe ConditionThis AD was prompted by reports of cracking in the LPT shaft. We are issuing this AD to prevent failure of the LPT shaft, which could lead to an uncontained engine failure and damage to the airplane. (e) Compliance Comply with this AD within the compliance times specified, unless already done. (1) If the LPT shaft has 15,000 or fewer cycles-since-new (CSN) on the effective date of this AD, remove it from service before it accumulates 20,000 CSN. (2) If the LPT shaft has more than 15,000 CSN on the effective date of this AD, remove it from service before it accumulates 5,000 additional cycles in service, or at the next piece-part exposure after accumulating 20,000 CSN, whichever occurs first. (3) After the effective date of this AD, do not install any LPT shaft listed in paragraph (c) of this AD that is at piece-part exposure and exceeds the new life limit of 20,000 CSN, into any engine. (f) Definition For the purpose of this AD, piece-part exposure is when the LPT shaft is completely disassembled from the engine. (g) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, FAA, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request. You may email your request to: ANE-AD-AMOC@faa.gov. (h) Related Information (1) For more information about this AD, contact Jo-Ann Theriault, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7105; fax: 781-238-7199; email: jo-ann.theriault@faa.gov. (2) PW Service Bulletin No. JT8D 6504, dated November 5, 2014, which is not incorporated by reference in this AD, can be obtained from PW using the contact information in paragraph (h)(3) of this AD. (3) For service information identified in this AD, contact Pratt & Whitney, 400 Main St., East Hartford, CT 06108; phone: 860-565- 8770; fax: 860-565-4503. (4) You mayview this service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781-238-7125. (i) Material Incorporated by Reference None.