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)

3.5.17 IPB. Unless otherwise specified, the IPB data shall normally be integrated with the

maintenance data within the maintenance manual. Unless otherwise specified, the IPB data shall

be developed in accordance with MIL-DTL-81929 or MIL-DTL-15014, as applicable.

3.6 External tubing, cabling and clamping. When specified in the contract, an intermediate

maintenance manual supplement shall be prepared. When a separate manual supplement is not

prescribed in the contract and the coverage is applicable, the coverage shall be provided in

separate WPs within the manual. This coverage shall contain necessary information for the proper

installation, positioning and identification of external tubing, cables, clamping and attaching

hardware. The alphabetical index of each technical content WP shall include, in addition to

paragraph headings, all figures contained in the WP. The technical content WPs shall be arranged

as follows:

a. Bracket installation

b. External components

c. Tubing, cabling and clamping installation

d. Critical clearances

3.6.1 Numerical index. A numerical index of external parts by part number, cross referenced

to their installation sequence number, shall be prepared. This index, identified as WP001 01,

shall follow the alphabetical index.

3.6.2 Bracket installation. Illustrations shall be prepared identifying the engine flanges and

views of each flange that brackets are secured to. Flange identification and view direction, spacer

size and location, bracket part numbers, angle location and direction, bolt head direction, and

torque values shall be provided.

3.6.3 External components. This coverage shall indicate what external components, such as

gearboxes, pumps, valves, and controls, must be installed prior to installation of tubing and cables.

Reference shall be made to the applicable maintenance WPs.

3.6.4 External tubing, cabling and clamping installation. Illustrations of the sides, top, and

bottom views of the engine showing all tubing, cabling, clamping and attaching hardware as it

would appear when properly and completely installed shall be prepared. These illustrations

should be drawn as foldouts and shall be done in a scale that assures the external configuration is

legible. All foldout illustrations shall be prepared as right hand pages in accordance with

MIL-DTL-81927. Circled numbers shall reflect installation sequence of each external part. The

sequence number, part number, nomenclature, and zone figure for detailed installation data shall

be prepared in tabular form. Critical clearance items shall be identified .