Airworthiness directives › 2017-20-01
AD 2017-20-01 Airworthiness Directives; Honeywell International Inc. Turbofan Engines
Applicability*9
This AD applies to all Honeywell International Inc. (Honeywell) TFE731-20 and TFE731-40 turbofan engines, with a fan disk, part number (P/N) 3060287-2, and a serial number (S/N) listed in Table 9 of Honeywell Service Bulletin (SB) TFE731-72-5256, Revision 0, dated October 7, 2016, that do not have “T43374” marked adjacent to the engine P/N or S/N.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Remove the fan disk using the following criteria: (1) Remove fan disks with 9,000 cycles-since-new (CSN) or more on the effective date of this AD, within 100 cycles-in-service (CIS), or at the next engine shop visit, or at next access, whichever occurs first, after the effective date of this AD. (2) Remove fan disks with between 8,000 and 8,999 CSN, inclusive, on the effective date of this AD, within 9,100 CSN or within 1,000 CIS, or at the next engine shop visit, or at next access, whichever occurs first, after the effective date of this AD. (3) Remove fan disks with fewer than 8,000 CSN, on the effective date of this AD, before exceeding 9,000 CSN, or at the next engine shop visit, or at next access, whichever occurs first, after the effective date of this AD. (4) Replace all removed fan disks with a part eligible for installation.
Unsafe condition
This AD was prompted by a report of two fan disks found with surface rollovers in the dovetail slot area. We are issuing this AD to prevent uncontained failure of the fan disks, damage to the engine, and damage to the airplane.
Affected ADs
None.
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