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AD/PW500/2 - Fuel Manifold Leakage
Pratt and Whitney Canada Turbine EnginesPratt and Whitney Canada Turbine Engines - PW500 Series
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Pratt and Whitney Canada Turbine Engines - PW500 Series
| AD/PW500/2 | Fuel Manifold Leakage | 1/2007 |
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| Applicability: | Pratt & Whitney Canada (P&WC) PW535A model engines with serial numbersPCE-DC0143 and earlier, NOT incorporating P&WC Service Bulletin (SB) 30197 at revision 3 or earlier revision status. |
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| Requirement: | Unless already accomplished in accordance with the instructions of P&WC SB 30197R3 or its earlier versions, replace fuel manifold, part number (P/N) 3052627-01 with a new fuel manifold P/N 3056404-01 in accordance with the instructions of P&WC alert service bulletin (ASB) A30314 dated 27 September 2006 or later Transport Canada approved revisions.Note: Transport Canada Airworthiness Directive number CF-2006-22 dated20 November 2006 refers. |
| Compliance: | For engines with fuel manifold, part number (P/N) 3052627-01, that has a total time since new (TTSN) of 1,500 flight hours or higher:Within 50 flight hours or 60 days after the effective date of this directive, whichever occurs first.For engines with fuel manifold P/N 3052627-01, that has less than TTSN of 1,500 flight hours:Within 150 flight hours or 90 days after the effective date of this directive, whichever occurs first. |
| This Airworthiness Directive becomes effective on 18 January 2007. | |
| Background: | There have been three reported incidents of PW535A engines leaking fuel in service. Investigation revealed the manufacturing process of the fuel manifold introduced characteristics that have resulted in a loss of sealing at a crimped joint. PW535A engine fuel manifold leakage could result in engine fire, in-flight shutdown or damage to the airframe. |
| P&WC ASB A30314 introduces a new manifold with an improved manufacturing process to rectify identified in-service leakage problem. |
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James Coyne
Delegate of the Civil Aviation Safety Authority
24 November 2006