1. Maintenance Overhaul Shops (off-Aircraft)
Embry-Riddle Aeronautical University
Maintenance Overhaul Shops (off-Aircraft)
Chapter 15

2. Maintenance Overhaul Shops
Introduction
Types of Shops
Engine Shops
Avionics Shops
Mechanical Shops
Outsourcing of shop maintenance work
Operation of Overhaul Shops
Shop Data Collection
Summary

3. Introduction
Responsible for the overall management & administration of maintenance for those components & equipment that are removed from the aircraft for maintenance.
Usually removed and replaced with item from supply
Item is removed, documented with discrepancy, and forwarded to appropriate maintenance shop (in-house or outsourced)
After repair is placed back in supply stores
Rarely may down aircraft until repaired & returned

4. Types of Shops Support Shops Overhaul Shops
Normally associated with Hangar Maintenance
Welding, sheet metal, composites, aircraft interiors, seats etc…
Overhaul Shops
Involves specialized equipment of the aircraft
Equipment is removed during line or hangar maintenance
Engine shops, Avionics, Mechanical Shops, outsourcing maintenance work

5. Largest in the sense of space EBU (Engine BuildUp)
Engine Shops
Largest in the sense of space
Bench work, administrative, & Engine Build Up (EBU)
EBU (Engine BuildUp)
Ability to drop, repair & replace – reduces out of service time – TIME = $$$
Specific components needs for engine location (right, left, or center)
Requires specialized GSE and tools – engine stand, hoists, tow tractors etc..
Hush house – engine run-up area

6. Avionics Includes electrical & electronic systems
Wiring, generators, power distribution, flight control computers
May have separate battery shop
Communication/Navigation/radar/instruments
Glass cockpit systems – HUD (Heads Up Display), LCD panels, CRT instruments
Fiber optics
Computer systems

7. Mechanical Shops Includes: Hydraulics systems & components
Pneumatics systems & components
Oxygen systems
Flight control systems (airframes)
Tire, Wheel, & Brake shop
Repair, assembly & disassembly of aircraft wheels
Repair, servicing, & re-treading of tires
Adjustment & replacement of aircraft brakes

8. Outsourcing of Shop Maintenance Work
Some or all of the shop maintenance can be outsourced
Director must coordinate these activities into the maintenance plan
Quality Assurance will identify & ensure the standards these contractors must abide
Maintenance agreement with manufacturer may require the outsourcing

9. Operation of Overhaul Shops
The pace may be slower than line or hangar maintenance but the MTTR – (Mean Time to Repair) is very important
Spare parts are purchased based on fleet failure rate & time to repair
Remove item from aircraft
Turn item into materiel for replacement
Route unit to the repair facility (in-house or outsourced)
Return serviceable unit to stores for reissue

10. Shop Data Collection
Many data collection tasks occur within maintenance
Overhaul shops are important source
Line & hangar reports focus on systems & components
Shop data focuses on internal components of the equipment & subsystems
Identifies the servicing, repair, & overhaul actions taken – as well as the parts, supplies & time
Components are tracked for reliability – failure rates (unnecessary high) – may require corrective action from engineers, manufacturers, airlines etc..

11. Maintenance Overhaul Shops
Introduction
Types of Shops
Engine Shops
Avionics Shops
Mechanical Shops
Outsourcing of shop maintenance work
Operation of Overhaul Shops
Shop Data Collection
Summary

12. Questions?