Airworthiness directives › 2014-11-05
AD 2014-11-05 Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines
Applicability*9
This AD applies to Pratt & Whitney Canada Corp. (P&WC) turboprop engines as follows: all model PT6A-20, PT6A-20A, PT6A-20B, PT6A-25, PT6A-28, PT6A-34B, PT6A-36, and PT6A-135 engines; model PT6A-11 engines, serial number (S/N) PC-E10539 and earlier; PT6A-11AG, S/N PC-E10224 and earlier; PT6A-15AG engines, S/N earlier than PC-E14089; model PT6A-21 engines, S/N PCE-25361 and earlier; model PT6A-25A engines, S/N PCE-48757 and earlier; model PT6A-25C engines, S/N PCE-26258 and earlier; model PT6A-27 engines, S/N PCE-42523 and earlier as well as all engines converted to PT6A-27; model PT6A-34 engines, S/N PCE-57303 and earlier as well as all engines converted to PT6A-34; model PT6A-34AG engines, S/N PCE-57312 and earlier as well as all engines converted to PT6A-34AG; model PT6A-110 engines, S/N PC-E15052 and earlier; model PT6A-112 engines, S/N earlier than PC-E12563; model PT6A-114 engines, S/N PCE-17218 and earlier; and model PT6A-135A engines, S/N PCE-35089 and earlier.
Compliance
If you modified the PT containment ring before the effective date of this AD using P&WC SB No. 12076, Revision 2, dated April 24, 1991, or earlier versions, or P&WC SB No. PT6A-72-A1427, Revision 2, dated April 3, 1990, or earlier versions, you have met the requirements of this AD.
Required actions
The Manager, Engine Certification Office, FAA, may approve AMOCs to this AD. Use the procedures found in 14 CFR 39.19 to make your request.
Unsafe condition
(1) Comply with this AD within the compliance times specified, unless already done. (2) Within 48 months after the effective date of this AD, modify the existing PT containment ring. Use paragraph 2, Accomplishment Instructions, of P&WC Service Bulletin (SB) No. 12076, Revision 3, dated January 17, 1992, or paragraph 3, Accomplishment Instructions, P&WC SB No. PT6A-72-A1427, Revision 3, dated January 27, 2012, as applicable, to make the modification.
Affected ADs
None.
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