JT8D SIR Article - Page 5: Improved Inspection Process for Hollow HPT Blades

Cracking on hollow HPT blades used on the JT8D-15A, -17A, -17AR and the JT8D-217C, -219 models continues to occur and has resulted in several unplanned engine removals. Investigation of fractured blades concluded that the old ultrasonic wall thickness inspection is inadequate. To address this, a more robust wall thickness inspection is necessary. The improved inspection process requires new ultrasonic equipment and tooling to ensure more accurate and repeatable wall thickness measurements. See the SIR for more information.

JT9D SIR Article - Page 5: JT9D External Tubing Approved Repair

Voi-Sham seals effectively prevent leakage in critical applications. They eliminate potential problems caused by nicks, scratches, and imperfect sealing surfaces or misalignment, as well as non-concentric conditions. The seals are easy to install and are effective in sealing under extreme temperature and pressure conditions. See the SIR for more details.

A New All Operator Wire (AOW) on PW2000 HPT Event and FAA Action Now Available

An All Operator Wire (AOW), PW2000/72-52/CTS:ACK:2008-10-28-1 applicable to the PW2000 engine model (all models) was issued on October 28, 2008 addressing the High Pressure Turbine Event and FAA Action. The purpose of the wire is for Pratt & Whitney to provide recommendations for operators to prepare, and help P&W prepare, for anticipated FAA action. The wire also contains background of the operational event and subsequent investigation leading up to this anticipated action.

Latest Version of the PW4000-100 Maintenance Planning Guide (MPG) Now Available Online

The latest version (October 31, 2008) of the PW4000-100 Maintenance Planning Guide (MPG) is now available online. MPG's consolidate maintenance data in a single document and identify "best practices". The updated MPG incorporates fleet experiences into maintenance recommendations and has accessory component soft times and workscopes that have been reviewed and updated if required. A new section has been added to Part III: Line Maintenance; Section 5 - Oil Consumption Monitoring.