PED—Period End Date-The month and year in which the current operating service period expires for a given aircraft and is subject to authorized adjustments resulting from ASPA evaluations. PERCENT DEFECTIVE—The number of defective units of production multiplied by 100, the product of which is divided by the total number of units of production. PERIODIC INSPECTION—An inspection per- formed on a unit of SE, in both the static and functional state, to detect defects that may have occurred since the last inspection. The period for performance of these inspections is established in increments of weeks. PHASE INSPECTION—A  series  of  related inspections performed sequentially at specific intervals. These inspections are the result of dividing the maintenance requirements into small packages containing approximately the same workload. PHYSICAL CUSTODY—Actual possession of the aircraft or SE for a definite purpose. This does not necessarily imply reporting custody. PI—Publication Identifier. PIPELINE—In logistics, the channel of support or a specific portion thereof by means of which material or personnel flow from sources of procurement to their point of use. It includes all program aircraft in logistic support of the operating segment of the inventory. PJT—Practical Job Training—Structured “hands-on” training conducted by the fleet readiness squadron or supporting AIMD involving an arranged problem, task, or sequence in an educational environment. PLA—Plain Language Address. PLAN OF ACTION AND MILESTONES—A document that identifies actions or tasks in the specific order needed to accomplish an objective. This document assigns to each action, the office responsible, and the start and completion date for each action. PLTS—Parts Life Tracking System—An automated system used for tracking the composition, location, and operating time/cycle counts or life usage indexes of aircraft engines, propulsion systems, modules, and life limited components. PLTS is used to develop long-range schedules for inspections, removals, replacements, procure- ments, and rework schedules for these components, based on usage requirements and fixed or variable usage rates. It provides important support to the RCM Program. PM—Preventive Maintenance—The care and servic- ing needed to maintain aircraft equipment, SE, and facilities in satisfactory operating condition by providing for systematic inspection, detection, and correction of incipient failures either before they occur or before they develop into major defects. PMC—Partial Mission Capable—Material condition of an aircraft that can perform at least one but not all of its missions. PMC is subdivided into PMCM and PMCS. PMC Hours = MC Hours - (OPC Hours + FMC Hours). PMCM—Partial Mission Capable Maintenance—The material condition of an aircraft that can perform at least one but not all of its missions because of maintenance requirements existing on the inoperable subsystem(s). PMCM time starts when the condition is discovered, except when the discovery is made in flight in which case PMCM time starts at the termination of flight. PMCM time stops when maintenance is completed or interrupted by a supply shortage. Work stoppage resulting from parts nonavailability is reported as PMCS. PMCM time resumes when required supply item(s) are delivered to the maintenance activity. PMCM Hours = PMC Hours - PMCS Hours. PMCS—Partial Mission Capable Supply—Material condition of an aircraft that can perform at least one but not all of its missions because maintenance required to correct the discrepancy cannot continue because of a supply shortage. PMCS time starts when a supply demand has been made for an item required to continue maintenance. PMCS time stops at the time the material is delivered to the designated delivery point or change of EOC Code. PMCS Hours = PMC Hours - PMCM Hours. PME—Precision Measuring Equipment—Devices used to measure, gauge, test, inspect, diagnose, or examine material, supplies, and equipment to determine compliance with requirements established in technical documents; for example, research, development, test, and evaluation documents, specifications, engineering drawings, technical orders, technical manuals, maintenance instructions, and serviceability standards. AI-20