AircraftDirectives
Airworthiness Directive

AD 2018-22-01 83 FR 55255

Federal Aviation Administration · 14 CFR part 39

FR document
2018-23775
Amendment
39-19474
Published
2018-11-05
Models covered
1
Last live check
2026-08-17

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AD

2018-22-01

FR doc 2018-23775 · 83 FR 55255

AD 2018-22-01Published 2018-11-05Effective 2018-12-10

Requires removing certain second stage turbine rotors from service at a reduced life limit.

Full official abstract

We are superseding Airworthiness Directive (AD) 88-12-10 for certain Honeywell International Inc. (Honeywell) TPE331 turboprop engines. AD 88-12-10 required reducing the life limit for certain second stage turbine rotors. This AD requires removing certain second stage turbine rotors from service at a reduced life limit. This AD was prompted by report that a TPE331-11U engine experienced an uncontained rotor separation. In addition, cracks were discovered through eddy current inspection (ECI) in the bore of the second stage turbine rotor assembly after publication of AD 88-12-10. We are issuing this AD to address the unsafe condition on these products.

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Applies to 1 model in our index