Airworthiness directives › 2021-09-10
AD 2021-09-10 Airworthiness Directives; Pratt & Whitney Turbofan Engines
Applicability*9
This AD applies to all Pratt & Whitney (PW) JT9D-3A, JT9D-7, JT9D-7A, JT9D-7AH, JT9D-7F, JT9D-7H, JT9D-7J, JT9D-7Q, JT9D-7Q3, JT9D-7R4D, JT9D-7R4D1, JT9D-7R4E, JT9D-7R4E1, JT9D-7R4E4, JT9D-7R4G2, JT9D-7R4H1, JT9D-20, JT9D-20J, JT9D-59A, and JT9D-70A (JT9D) model turbofan engines.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 30 days after the effective date of this AD, add Figure 1 to paragraph (g) of this AD to the Airworthiness Limitations Section (ALS) of the manufacturer's Instructions for Continued Airworthiness (ICA) and, for air carrier operations, to the existing continuous airworthiness air carrier maintenance program. BILLING CODE 4910-13-P ER22AP21.000 ER22AP21.001 BILLING CODE 4910-13-C
Unsafe condition
This AD was prompted by the need to require enhanced inspection of selected critical life-limited parts of PW JT9D model turbofan engines. The FAA is issuing this AD to prevent the failure of critical life-limited rotating engine parts. The unsafe condition, if not addressed, could result in uncontained part release, damage to the engine, and damage to the airplane.
Affected ADs
This AD replaces AD 2012-04-15, Amendment 39-16971 (77 FR 15939, March 19, 2012).
Read the original on the Federal Register →
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