MIL-DTL-81218 Manuals, Technical: Aircraft Engine Intermediate And Depot Maintenance, Preparation Of \(Work Package Concept\)This specification covers technical manual content requirements for preparation of aircraft engine intermediate and depot maintenance instructions in work package \(WP\) format for uninstalled reciprocating and gas turbine engines, including turboprop and turboshaft. This specification also covers requirements for an intermediate maintenance manual supplement for the installation, positioning, and identification of external tubing, cabling, clamping and attaching hardware and a Sequence Control Chart \(SCC\) that graphically depicts accomplishment of complete engine repair. When specified by the requiring activity, an Illustrated Parts Breakdown \(IPB\) shall be included.

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MIL-DTL-81218C(AS)

3.5.9 Preinduction and mandatory inspection requirements. Preinduction and mandatory

inspection requirements covering any engine inducted at intermediate or depot maintenance level

are required as a separate WP. The WP shall detail inspection/investigation procedures. The

depth of inspection/investigation shall depend upon remaining engine life, operational

requirements and economic feasibility. Applicable WPs shall be referenced for details of removal,

cleaning, inspection, repair, assembly, installation, and testing. Probable cause/corrective action,

and mandatory/recommended maintenance tasks to be taken for correction of engine defects shall

be detailed. Major inspection requirements for complete engine repair shall be identified.

3.5.10 Preparation for test. Setup procedures required to prepare the engine for test shall be

included. Reference shall be made to assembly and disassembly procedures in applicable

maintenance WPs, when necessary. Instrumentation and fluid, air, and electrical supply

requirements shall be included. The applicable test system and engine adapter stand or cell shall

be listed as support equipment. Procedures for operation of the test system, description, and

location of instrumentation, controls or indicators shall be covered in the test system manual only.

This information is not to be duplicated in the engine maintenance manual. Other support

equipment required for test setup, such as special adapter assemblies peculiar to the engine being

tested and special fittings to be installed in sensing lines for monitoring and test instrumentation,

shall also be listed if not covered in the engine test system manual. When a special adapter

manual or supplement for adaptation of the engine to the stand or cell is available or being

prepared, the adapter manual or supplement shall be referenced and only those procedures

necessary to insure complete installation and removal instructions shall be included. Operation,

installation, description, and location of items such as indicator lights, switches, fuses, and digital

meters, shall be included in the adapter assembly maintenance manual and shall not be duplicated

in the engine maintenance manual.

3.5.11 Engine test. Complete instructions shall be included covering test requirements at the

maintenance level covered in the manual. Test data pertaining to specific testing conditions and

instructions required for use of support equipment, if applicable, shall be included. If an engine

malfunction should occur, reference shall be made to the troubleshooting WP. Coverage shall

include:

a. Safety precautions

b. Static test and motoring procedures

c. Start-up information, operation and shutdown procedures, and emergency shutdown

procedures.

d. Operating and test parameters

e. Level of testing following specific repairs