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)

3.6.4.1 Zone references. An illustration depicting the engine zones shall be prepared.

3.6.4.2 Zone detail views. A detailed view of each engine zone shall be prepared. These

zone detail figures shall contain complete information necessary to install all external parts and

attaching hardware. A key shall be prepared for each detail view.

3.6.5 Critical clearances. This coverage shall illustrate the specific critical clearance areas and

identify the minimum allowable measurement that is required to ensure sufficient clearance exists

in those areas.

3.7 Sequence control chart. When specified in the contract (see 6.2.1), a sequence control

chart (SCC) shall be prepared. The SCC shall be a graphic presentation that will program the

accomplishment of complete engine repair (CER) in a logical order. The presentation shall

contain the major CER tasks and their required sequence, oriented to actual work time and

manpower utilization.

3.7.1 Format.

3.7.1.1 Image area. The image area of the SCC shall be 17 inches high by 50 inches long.

3.7.1.2 Upper portion. The upper portion of the SCC shall contain the following:

a. Table including identification of crew members, their rating (RTG), Military Occupational

Specialty (MOS), and applicable WPs.

(1) Crew member no. - Number assigned to each specialist (no. 1 is normally the crew

leader).

(2) RTG/MOS - The type of rating and MOS shall be determined in accordance with

NAVPERS 18068 and MCO P1200.7.

(3) Applicable WPs - The WP numbers of tasks assigned to each specialist. The WPs are

in the engine intermediate maintenance manual.

b. Work Area Chart - An illustration of the engine with a breakdown of work areas numbered

and identified in a legend.

c. Title block (centered) with notation that chart is to be used with applicable WPs in engine

intermediate maintenance manual and other applicable technical manuals (corresponding

MRCs and tubing, piping and clamping manual supplement).

d. Table with blocks for job numbers, times and dates for four engines.