Cover Image

Not for Sale



View/Hide Left Panel
Click for next page ( 41


The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement



Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text on the opening pages of each chapter. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

Do not use for reproduction, copying, pasting, or reading; exclusively for search engines.

OCR for page 40
40 PMI Checklist Number each inspection item consecutively (e.g., 117). Add a sheet to each inspection checklist to allow the Because of the many individual steps involved, PMI mechanic to elaborate on the defects found during practices typically involve a checklist. (A checklist can also the inspection. The sheet should include space to indi- be used for more involved jobs, such as engine or transmis- cate the corresponding checklist item number and space sion rebuilding.) The checklist format breaks down each for describing the defect. For example: inspection item and includes a "box" or area to indicate if the Item #2 (backup alarm): beeps once then turns off. inspection revealed a normal or abnormal condition, typically Consider including a body diagram sheet with each PMI expressed as either pass or fail, good or no good. checklist that shows the front, rear, and both side Virtually every agency uses some form of checklist profiles of a generic bus to indicate the location of spe- to carry out inspections. While there is no single "universal" cific body damage. format to follow, agencies may want to consider the following approaches for a bus PMI as a way of modifying their exist- Note: Examples of checklists used to develop sample PMI ing format: practices are found in the sample bus PMI practices found in Chapter 6. Include space to indicate bus number, mileage, garage (if applicable), date, and other essential information. Include space for signature and/or employee identifica- Quality Control Checklist tion number of person(s) performing the inspection. Include space to indicate fluid and filter changes for Agencies may also want to include in their practices a check- each inspection type. For example: list to indicate when a supervisor or lead worker needs to inspect Inspection A: Engine oil and filter. certain work steps and sign for them before having the worker Inspection B: Engine oil, engine filter, coolant filter, etc. begin the next task. This can be especially useful for component Break down the inspection checklist into separate cate- rebuilds or repairs that involve troubleshooting. In the case of gories (e.g., Part 1 and Part 2). For example: rebuilds, a supervisory signoff ensures that various tasks have Part 1: Initial Checks (i.e., checks performed while been performed according to quality standards before the the bus is being moved into the shop) component has been fully assembled (i.e., before any faulty Backup alarm, speedometer operation workmanship can be hidden from view). In the case of trou- Etc. bleshooting, a supervisory signoff makes certain that the correct Part 2: Diagnostic Checks (i.e., checks requiring a fault diagnosis has been made before the worker begins the diagnostic tool plug-in) repair. Engine oil pressure Signoff inspections, if required, can be done on a separate Fuel pressure checklist attached to the practice. Information contained in Etc. the checklist could include: Parts 3, 4, 5, etc.: Undercarriage Checks, Exterior Checks, Interior Checks, etc. Practice description (e.g., rebuild circulating pump For each major category consider including the various motor model XYZ), action items that need to take place before carrying out Employee name and/or identification number, the inspections. For example, action items under Diag- Date and time started and ended, nostic Check could include: Identification of each subtask requiring signoff approval Connect manometer to check air-intake vacuum (see Table 4-1), restriction Employee signature and date, and Connect exhaust hose Supervisor signature and date. Turn master switch to "Run" position, listen for ABS valve bursts, and start engine VALIDATING AND UPDATING PRACTICES For each inspection item, include a checkbox for indi- cating: Validating If the inspection revealed a normal condition (e.g., pass), or an abnormal condition that requires follow- After practices have been developed, they must be vali- up work (e.g., fail) dated to make certain that the procedures contained in them The criteria for making the inspection. For example: are appropriate, safe, and representative of efficient task For ABS/traction control valves: a total of four air sequencing. The validation process continues on a periodic bursts should be heard basis to keep practices accurate and effective over time. If For fuel pressure: 2530 psi @ idle, 7090 psi at time standards are used in practices, they will also need to be top RPM, etc. validated together with the work procedures. Additional