Maintenance Overhaul Maintenance Overhaul ShopsShops

(off-Aircraft)(off-Aircraft)

Maintenance Overhaul Maintenance Overhaul ShopsShops

(off-Aircraft)(off-Aircraft)

Embry-Riddle Aeronautical University

Chapter 15

Maintenance Overhaul ShopsMaintenance Overhaul ShopsMaintenance Overhaul ShopsMaintenance 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

IntroductionIntroductionIntroductionIntroduction 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

Support 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

Types of 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

Engine Shops

AvionicsAvionicsAvionicsAvionics

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

Mechanical ShopsMechanical ShopsMechanical ShopsMechanical 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

Outsourcing of Shop Maintenance WorkOutsourcing of Shop Maintenance WorkOutsourcing of Shop Maintenance WorkOutsourcing 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

Operation of Overhaul ShopsOperation of Overhaul ShopsOperation of Overhaul ShopsOperation 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

Shop Data CollectionShop Data CollectionShop Data CollectionShop 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..

Maintenance Overhaul ShopsMaintenance Overhaul ShopsMaintenance Overhaul ShopsMaintenance 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

Questions?Questions?Questions?Questions?