MRO- Maintenance, Repair & Overhaul. All actions which have the objective of retaining or restoring an item in or to a state in which it can perform its required function. The actions include the combination of all technical and corresponding administrative, managerial, and supervision actions.
All actions which have the objective of retaining or restoring an item in or to a state in which it can perform its required function. The actions include the combination of all technical and corresponding administrative, managerial, and supervision actions.
Regulation of Maintenance
Airworthiness Directives (ADs)
Maintenance i.a.w. maintenance programme
Defect rectification to an approved standard
Modifications and its policy
Life limits and expiry dates
These requirements must be performed in accordance with procedures acceptable to the Authority
Responsibilities of Airline Operators
Each airline develops its own program, based on manufacturer’s planning documents, but includes adjustments for the airline’s own operations
Each aircrafts requires different operators and programs
BUT, aircraft of the same number of routine maintenance hours during the program cycle
Engine Compressor washes
flight control rigging tests
I must leave this shop in full airworthy condition !
CFM56-5B and CFM56-5C at TAP Maintenance & Engineering C-Check Hangar
JT8D at TAP Maintenance & Engineering Engine Overhaul Shop
TAT and profit margin considerations shall never impair quality !
ex: GE, Snecma, P&W, RR, etc.
Airline Engine Shops (integrated or independent from airline)
ex: TAP M&E, KLM E&M, Lufthansa Technik, Air France Industries, etc.
Independent Engine Shops
ex: MTU, Fiat Avio, IAI, etc.
Engine MRO Providers
Done due to unforeseen event such as accident.
An example of the first engine damage due to bird ingestion or an airframe dented by a catering truck
Done also for an aging aircraft
Any form of upgrading of cleaning, brighting, or making it fresh again.
To renovate and upgrade the aircraft
For example: Cabin upgrades and exterior painting
Any form of small alteration, adjustment, or limitation to fulfill the aircraft’s owner.
Most modifications are carried out within the interior design, not much on the airframe and engine.
For example: Installation of karaoke, PS3 and various kind of entertainment in the cabin
A plan where a series of seven minor overhauls and one major check were conducted on aircraft
The major overhaul was designed to rework the airplane to a like-new condition-to fit the bits and pieces back together to the exactness of current manufacturing tolerances
Components are brought in when either operating time/ condition requires it
The overhaul returns them to specifications laid down by engineering and manufacturer
BUT when practical, engine changes are made during maintenance checks or airframe overhauls
Manage workscope vs. required TAT
Manage stock level vs. required TAT
Manage scrap replacement vs. repair
Expectation from Engine MRO Provider
The key challenge for an Engine MRO Provider is to manage the balance between TAT and Cost maintaining
Performance, Flexibility, Quality
Reliability, Quality and Speed are nowadays more important than Price for the Airline Operator
Source: A.T. Kearney
In order to reduce costs and increase survivability, Airline Operators focus on their core businessand reduce staff to a minimum
Shortage of skilled staff is one of the greatest obstacles today for future performance gains among Airline Operators
Newer engines are becoming increasingly more complexrequiring higher levels of engineering expertise
Highly competitiveengine MRO situation prevents Providers from obtaining desired profit margins
In general, Airline capability to control their JAR-OPS 1.890 responsibilities in respect to engines has decreased significantly in the past years and will probably continue in the near future
Stresses MRO Quality Assurance departments
Added responsibilities on JAR-145 approved organisations stress National Authorities and Internal Audit to maintain proper control
Hey pal, I have some friends in the technical dept. who take real good care of me.
I guess I will end up in the hands of an MRO Provider… I just hope it is really good !
Airlines are for flying ! I’ve got to reduce some resources in other departments.
Oh..fly boys…! just want to fly, but they must take care of their planes too. I’d better keep close control.
My QA friend really knows his place and his people. He’s doing a fine job. I have to help him more.
Time is money. Hurry up !
Humm... These mechanics know what they’re doing, but are always under stress. I’d better tighten the control and check them more often.
Sometimes there are just so many rules, so much to learn and so little time !...
... and my boss always tells me to hurry up.
QA - MRO