Airworthiness directives › 2012-11-14
AD 2012-11-14 Airworthiness Directives; Pratt & Whitney Canada Turboprop Engines
Applicability*9
This AD applies to all Pratt & Whitney Canada (P&WC) PW118, PW118A, PW118B, PW119B, PW119C, PW120, PW120A, PW121, PW121A, PW123, PW123B, PW123C, PW123D, PW123E, PW123AF, PW124B, PW125B, PW126A, PW127, PW127E, PW127F, PW127G, and PW127M turboprop engines, with the serial number (S/N) propeller shafts listed in P&WC Alert Service Bulletin (ASB) No. PW100-72-A21813, Revision 3, dated March 21, 2012, and ASB No. PW100-72-A21802, Revision 4, dated March 16, 2012.
Compliance
(1) Within 30 days after the effective date of this AD, remove from service propeller shafts with an S/N listed in Table 1 of P&WC ASB No. PW100-72-A21802, Revision 4, dated March 16, 2012. (2) For propeller shafts with a S/N listed in Table 1 or Table 2 of P&WC ASB No. PW100-72-A21813, Revision 3, dated March 21, 2012: (i) Within 200 engine flight hours (EFH) or 40 days, whichever occurs first after the effective date of this AD, perform either an initial visual inspection or an initial ultrasonic inspection (UI) for cracks, in accordance with paragraphs 3.C.(1) through 3.C.(1)(a), and 3.C.(2) of P&WC ASB No. PW100-72-A21813, Revision 3, dated March 21, 2012, and Section 9 of P&WC Special Instruction (SI) P&WC 22-2012R2, dated April 4, 2012. (ii) If the visual inspection was performed, repeat the visual inspection within 50 EFH after the initial inspection, and thereafter every 10 EFH, until the propeller shaft is removed from service. (iii) If the UI was performed, repeat the UI at intervals not to exceed 1,000 EFH, until the propeller shaft is removed from service. (3) If a crack is found during any of the inspections required by this AD, remove the propeller shaft from service before the next flight.
Required actions
After the effective date of this AD, do not install any propeller shaft S/Ns listed in Table 1 of P&WC ASB No. PW100-72-A21802, Revision 4, dated March 16, 2012, into any engine.
Unsafe condition
Unless already done, do the following actions.
Affected ADs
None.
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