AWB 01-10 Issue 1 - Suspected Unapproved Parts Pratt & Whitney JT3D & JT8D critical rotating engine parts
AWB 01-10 Issue 1, 6 February 2002
Suspected Unapproved Parts
Pratt & Whitney JT3D & JT8D critical rotating engine parts
Pratt and Whitney JT3D and JT8D critical rotating engine parts returned to service by Cadmar Aerospace Inc. and listed on FAA Special Airworthiness Information Bulletin (SAIB) No. NE02-08 dated 20 December 2001.
The purpose of this Bulletin is to alert all aircraft owners, operators, maintenance organisations, manufacturers and parts distributors regarding Pratt and Whitney JT3D and JT8D critical rotating parts which may been improperly returned to service by Cadmar Aerospace Inc. of Cape Coral, Florida, USA.
The FAA has raised Special Airworthiness Information Bulletin No. NE02-08 dated 20 December 2001 following a Suspected Unapproved Part investigation regarding engine components overhauled by Cadmar Aerospace, Air Agency Certificate number C6DR663J. This investigation revealed that their inspection procedures did not detect cracks, unacceptable corrosion pitting and blending beyond acceptable depths. Other findings included unauthorised machining, questionable non-destructive inspection procedures, and dimensions outside manual limits.
Many of these parts were shipped to third-party suppliers or FAA repair stations, therefore, it will not be immediately obvious that the parts were overhauled at Cadmar. A complete list of these parts is included in SAIB No. NE02-08. This list, comprising in excess of 1000 serialised components, identifies by Part number and serial number, the parts currently under investigation in this Suspected Unapproved Parts investigation.
Approximately 25% of these parts were shipped to owners and operators through Pratt & Whitney's' aftermarket supply operations, Dallas Aerospace (DAO), and Serviceable Material Management Organisation (SMMO), the following All Operator Wires refer;
All/72-00/CTS: DSA:07-17-1 (C1198-54227) dated 17 July 2001;
All/72-00/CTS: CRC:1-7-27-1 (C1208-G54409) DATED 27 July 2001; and
All/72-00/CTS: CRC:1-10-4-1 (C1278-G31898) dated 4 October 2001.
The above wires also provided additional background information and Pratt & Whitney recommendations on parts shipped from DAO and SMMO.
The FAA investigation is expected to be completed by the second quarter of 2002 and the final corrective action plans may be incorporated in an Airworthiness Directive for some or all of the suspect parts.
Aircraft owners, operators, maintenance and distributor organisations are advised to review their aircraft records and/or aircraft parts inventory for parts approved for return to service by Cadmar Aerospace Inc. and listed on SAIB No. NE-02-08. Where a part is found, it is recommended that the part be inspected utilising the following criteria:
- Parts currently at piece part level should be reinspected in accordance with engine manual procedures prior to their return to service.
- Parts that are currently installed on engines in service, spare engines or engine modules should be inspected in accordance with engine manual procedures at the next time these parts are in a shop at the piece part level
- Inspections should include but not be limited to:
- a dimensional check;
- non-destructive test;
- corrosion inspection;
- surface condition inspection;
- inspection for proper repair performance.
- Installed or uninstalled parts that were reinspected prior to service in accordance with the above recommendations and the referenced Pratt & Whitney wires require no further action.
- A summary of the above inspection results may be submitted to the FAA address below. The data provided will be used in evaluating a final management plan and regulatory corrective action. The summary should include as much of the following as possible:
- part number
- serial number
- total time and cycles since new
- total time and cycles since overhaul
- a brief description of the discrepancies found.
A copy of the list of suspected components circulated with SAIB No. NE-02-08 can be obtained from Maintenance Standards Branch.
If a non-conforming part is found either installed in an aircraft engine or held in storage awaiting installation, a Major Defect Report must be raised pursuant to regulation 51A of CAR 1988.
For further information
The FAA has supplied the following contact details for anyone who requires further information on this issue.
FAA Engine and Propeller Directorate
Engine Certification Office
2 New England Executive Park
Tel (781) 238-7175