MESA Airlines

Request To Clarify. The proposed AD requirements are not entirely clear. Paragraph (h) states in part, do each of the Environmental Damage/Corrosion Protection and Control Program (ED/CPCP) inspections etc… The way this is worded it appears only tasks identified as both ED/CPCP are the tasks required by this proposed AD. There are 16 tasks identified as ED/CPCP in Part 1, Section 3, Structural Inspection Program, of the Dash 8 Maintenance Program MRB Report PSM 1-82-7, Revision 13, dated, November 1, 2008. However, the NPRM references ATA codes 32, 51, 52, 53, 54, 55, and 57 and none of the 16 tasks identified as ED/CPCP are ATA 32, 51, 54 or 57. The tasks identified in ATA 32, 51, 54 and 57 are classified only as ED tasks in Part 1, Section 3, Structural Inspection Program, of the Dash 8 Maintenance Program MRB Report PSM 1-82-7, Revision 13, dated November 1, 2008. Adding these tasks (ED only) to what the NPRM is directing makes the total 29 tasks – not just the 16 identified as ED/CPCP. For clarity, we request paragraph (h) be reworded to state, do each of the inspections identified as Environmental Damage (ED) and/or Corrosion Protection and Control Program (CPCP). This will encompass all the ATA codes referenced. If this is, indeed the requirement of the NPRM.