Airworthiness Directive · Amendment 39-15806 · Pratt & Whitney Canada PW206A, PW206B, PW206B2, PW206C, PW206E, PW207C, PW207D, and PW207E Turboshaft Engines
Pratt & Whitney Canada PW206A, PW206B, PW206B2, PW206C, PW206E, PW207C, PW207D, and PW207E Turboshaft Engines
This airworthiness directive (AD) applies to Pratt & Whitney Canada (PWC) PW206A, PW206B, PW206B2, PW206C, PW206E, PW207C, PW207D, and PW207E turboshaft engines.
(d) These engines are installed on, but not limited to, MD Explorer, Agusta S.p.A. A109, A109E, A109S, Bell Helicopter Textron Canada Limited 427, Bell 429, and Eurocopter Deutschland GmbH EC135 P1, and EC135 P2 helicopters.
(e) For engines that have been converted from one model to another, see Effectivity paragraph 1.A. of PWC Alert Service Bulletin (ASB) PW200-72-A28280, Revision 4, dated August 28, 2007.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions:
(1) For engines that have never had a shop visit and have accumulated 4,000 CT cycles or more since new; or for engines that accumulated 2,700 CT cycles or more since last shop visit, last CT disc inspection, or incorporation of PWC SB PW200-72-28287; within 1,150 hours of engine operating time since April 28, 2006 (original issue date of Alert Service Bulletin (ASB) PW200-72-A28280), but not later than 30 days after the effective date of this AD, whichever occurs first, accomplish the following in accordance with PWC ASB PW200-72-A28280, Revision 4, dated August 28, 2007:
(i) Inspect the CT disc bore area for damage and if any damage is noticed, replace the CT disc before further flight.
(ii) Replace the existing CT disc retaining nut and associated hardware.
(2) For engines that have never had a shop visit and have accumulated less than 4,000 CT cycles since new, before the engine reaches 4,000 CT cycles or within 30 days after the effective date of this AD, whichever occurs later, accomplish the following in accordance with PWC ASB PW200-72-A28280, Revision 4, dated August 28, 2007:
(i) Inspect the CT disc bore area for damage and if any damage is noticed, replace the CT disc before further flight.
(ii) Replace the existing CT disc retaining nut and associated hardware.
(3) For engines that have accumulated fewer than 2,700 CT cycles since last shop visit, last CT disc inspection, or incorporation of PWC SB PW200-72-28287; before the engine reaches 2,700 CT cycles or within 30 days after the effective date of this AD, whichever occurs later, accomplish the following in accordance with PWC ASB PW200-72-A28280, Revision 4, dated August 28, 2007:
(i) Inspect the CT disc bore area for damage and if any damage is noticed, replace the CT disc before further flight.
(ii) Replace the existing CT disc retaining nut and associated hardware.
Inspection of the CT disc bore and replacement of the CT disc retaining nut using PWC ASB PW200-72-A28280, dated April 28, 2006, or Revision 1, dated May 11, 2006, or Revision 2, dated September 29, 2006, or Revision 3, dated December 11, 2006, before the effective date of this AD, meets the requirements of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
