MPD Flashcards
MPD Sources % split
70% MRB - Maintenance Review Board
20% Type Certification Process - ALS
10% other, AD, CMP (Configuration Maintenance Procedure - applies for ETOPS), SB’s, ISB, OIT, AOT, ISI
MRB Process history
Responsibility of Scheduled Maintenance definition in aviation:
Early years of aviation: Mechanics
1950: Aircraft Manufacturer
1960: Industry formed task force to investigate in capabilities of preventive maintenance
1970: Development of Maintenance Steering Group for 747
1980: Industry applies in majority MSG-3 approach
National regulations
ICAO convention Annex 8: Airworthiness of Aircraft: it is the manufacturers responsibility to identify scheduled maintenance tasks that form part of the Instructions for Continued Airworthiness (ICA) of the aircraft. CS/FAR25.1529
CS-25 certification specification for large aircrafts
The MRB process plus MSG-3 method arr ‘acceptable means of compliance’ with CS/FAR25.1529
ATA MSG-3 Document - 4 sections?
- Aircraft Systems, APU and Powerplant Analysis Procedure
- Aircraft Structural Analysis Procedure
- Zonal Analysis Procedure
- Lightning/High Intensity Radiated Field (L/HIRF) Analysis Procedure
Type Certification Process
Demonstration of compliance to certification requirements leads to the identification of limitations to prevent or detect unsafe conditions:
ALS is a repository of stand-alone documents
Regulation requirements lead to different ALs documents: EASA/FAR
25-571 | Fatigue Analysis
Safe Life: ALS Part 1
Damage Tolerant Airworthiness = ALI: ALS Part 2
25-1309
System Safety Analysis & MSG-3
CMR - Certification Maintenance Requirements
ALS Part 3
System Aging Analysis post DSG + MSG-3 + System Life Limits
Aging System Maintenance (ASM): ALS Part 4
Soft Time
Additional preventivr actions incl in your MPD in order to reduce cost especially operational interruption cost which outweight the addition maintenance cost of inspection.
Line Maintenance Structure Visual Inspection
6 man and 5 hours and with drone only 30min
