ORDER: 8300.10 APPENDIX: 4 BULLETIN TYPE: Flight Standards Information Bulletin (FSIB) for Airworthiness (FSAW) BULLETIN NUMBER: FSAW 94-48 (Extended) BULLETIN TITLE: Procedures to be Used to Approve Instructions for Continued Airworthiness Approved by Supplemental Type Certificates (STC) EFFECTIVE DATE: 01-14-97 ------------------------------------------------------------ 1. This FSIB is to alert all principal maintenance inspectors (PMI) of the existence of the Maintenance On Reliable Engines (MORE) Program Supplemental Type Certificates (STC) and to provide guidance for incorporating the MORE STC's into operations specifications and the applicable inspection program under Title 14 of the Code of Federal Regulations (14 CFR) section 135.411.

Jul 31, 2012 A discussion on PT6 engine STCs By Joe Escobar The Pratt & Whitney PT6 engine is in wide use today. Since its introduction in 1964, the PT6. Airtime has applied the MORE Program to PT6A engines. The MORE Program is a Supplemental Type Certificate owned by the MORE Company. The STC covers 31 PT6A.

The MORE STC's are intended to supplement, not replace, the Pratt and Whitney Canada (PWC) PT6A Instructions for Continued Airworthiness; specifically, the service information letters entitled 'Engine Operating-Time-Between Overhauls and Hot Section Inspection Frequency' (see note 14 of the applicable type certificate data sheet for the exact numbers). This FSIB will address the specifics of section 135.411(a)(1) (9 passenger seats or less per aircraft) operator. The PMI can also apply these fundamental principles to an operator using aircraft with ten or more passenger seats.

There is concern that some operators have used the STC's (referred to as the MORE Program) to increase time between overhaul (TBO) intervals beyond those allowed by their operations specifications without the trending and inspection procedures required by the MORE Program and FAR. To comply with section 135.421, an operator must make appropriate changes to its operations specifications if the inspection program under consideration differs from the manufacturer's recommended program or from another program approved by the Administrator for the particular operator. Although the MORE STC is a program approved by the Administrator, it needs to be incorporated by each particular operator through an amendment to its operations specifications.

The MORE Company, Inc., has developed a program to maintain some models of the PWC PT6A engine, on a 'on-condition' basis. The on-condition program comprises preventive maintenance; repetitive inspections, checks, and tests; spectrometric oil analysis; performance trend monitoring; and propeller balance and vibration analysis. The operator must have procedures in place which adequately administer the program requirements. The procedures should be clearly defined and OpSpecs Paragraph D71 should reference the document or section of the manual containing the procedures. The procedures should include: (a) A description of how the operator will ensure compliance with the various requirements of the program. (b) The title of the person(s) responsible for performance of various elements of the program and the person(s) responsible for program management.

(c) Program management procedures should include recognition of adverse trends and revision of inspection frequencies or requirements resulting from program findings. (d) A description of the system and procedures to ensure that all records required by the program can be specifically tracked to the engine that incorporates the MORE STC. The MORE program has set forth qualifying requirements for persons other than the operator who perform required inspections and/or maintenance. If the operator has made such arrangements, procedures should be established to identify those persons and ensure that the records of the work accomplished are made available to, and maintained by, the operator. Operators should be advised that they must maintain all records and reports necessary to demonstrate continued compliance with the MORE Program. Operators using engines that have been modified to incorporate a MORE STC should be aware they must comply with the requirements set forth in the STC, irrespective of 14 CFR parts 91 or 135 under which the aircraft is being operated.

The MORE Program inspections and maintenance requirements are organized in the following three sections: A. When an operator incorporates one of the MORE STC's on a specific engine (each engine by serial number must be considered independently), the operator must comply with the initiation requirements of part 4 of the program document. The STC must be applied to each engine the operator intends to operate under the MORE Program. Additional maintenance required to bring the engine into compliance with the MORE Program must be performed (e.g., periodic inspections that were not previously performed in accordance with the engine's prior maintenance program). Fast Break Pro Basketball Serial. Periodic Inspections. Part 3 of the program document defines the preventive maintenance to be performed at the specified intervals while the engine is installed in the aircraft.