The Industry Steering Committee (ISC) comprises operators, manufacturers, and regulators who follow the guidance outlined in Advisory Circular AC 121-22A , based on use of ATA MSG 3 methodology to develop the scheduled maintenance program for a given aircraft systems structure and engines which results in the maintenance Review Board Report (MRBR). The MRBR is used as the source document for the MPD.
The ISC, are tasked with developing and establishing the policy for the development of the MRBR proposal and participate in the review and approval process of the ISC. The document is termed the Policy and Procedures Handbook PPH.
The Maintenance Planning Document (MPD) contains all the MRB requirements together with the mandatory scheduled maintenance requirements.
After “proof of concept” with the accumulation of reliability data it is quite common for MRBR tasks to receive interval escalation. (Note that “Mandatory” Airworthiness Limitation Section (ALS) may only be escalated with the permission and concurrence of the applicable airworthiness authority.)
Maintenance Review Board Report (MRBR) tasks are all derived from the ATA Airline/Manufacture Maintenance Program Planning Document using MSG-3 analysis also listing their MSG-3 Failure effect categories and intervals.
Supplemental inspection tasks derived outside of the MRB process are detailed in the aircraft’s Certification Maintenance Requirement (CMR) and Airworthiness Limitation (AWL) documents.
The MPD has all the tasks from the MRBR, plus other tasks over the years which the airframe and engine manufactures suggest or recommend that an operator should carry out.
The MPD will also include SB inspections and some AD tasks if there is no terminating action for the AD. The MPD will also include tasks from the CMP (ETOPS manual).
Section 9 (Boeing) and Section 5 (Airbus) of the MPD has all the mandatory inspections for systems and structure together with the new fuel AWLs listed.
The MPD contains additional planning information for example man hours.
Development of the MPD continues unabated as long as the aircraft remains in service.
The Airframe, Engine and Component Manufacturers work with an Industry Steering Committee to improve the cost efficiency and effectiveness of the maintenance tasks based on accumulation and analysis of maintenance data by the operators.
Operators are responsible for the effectiveness of their maintenance program and welcome opportunities to escalate their scheduled maintenance programs based on MRBR source data .
Typically improvements are developed to optimize the content and interval of maintenance tasks whilst maintaining inherent safety and reliability and delivering cost inefficiencies. Improvements are based on Manufactures analysis of in-service data collected from the worldwide fleet. All improvements are reviewed and approved through an industry process involving TCH, operators, and regulatory agencies.
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Tags:
Airworthiness Limitation, AWL, Industry Steering Committee, ISC, Maintenance Planning, Maintenance Review Board Report, MPD, MRBR
