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Alaska Airlines 1282

Printed page xiii. PDF page 13.

reportable event. We recommended that Boeing continue the certification process for the design enhancement for MED plugs to ensure that, once the design enhancement is certified, all applicable newly manufactured airplanes are equipped with the enhancement. We also recomme
Open official document at PDF page 13NTSB AIR-25-04: In-Flight Separation of Left Mid Exit Door Plug, Alaska Airlines Flight 1282

Alaska Airlines 1282

Printed page 75. PDF page 89.

special attention requirements bulletins. 1.12.2.7 Ongoing Work on Mid Exit Door Plug Design Enhancement Certification After the accident, Boeing worked with Spirit AeroSystems (which owned the MED plug engineering design) to develop a design enhancement to add two secon
Open official document at PDF page 89NTSB AIR-25-04: In-Flight Separation of Left Mid Exit Door Plug, Alaska Airlines Flight 1282

Alaska Airlines 1282

Printed page 92. PDF page 106.

was performed. After the accident, Boeing worked with Spirit AeroSystems to develop a design enhancement intended to ensure the safety of MED plug installations. The design enhancement would add two secondary retention devices to prevent an MED plug from moving
Open official document at PDF page 106NTSB AIR-25-04: In-Flight Separation of Left Mid Exit Door Plug, Alaska Airlines Flight 1282

Alaska Airlines 1282

Printed page 120. PDF page 134.

quality assurance inspection of the plug closure was performed. 19. The postaccident design enhancement of the mid exit door (MED) plug, if certified by the Federal Aviation Administration and implemented by Boeing Commercial Airplanes, will help ensure the complete clo
Open official document at PDF page 134NTSB AIR-25-04: In-Flight Separation of Left Mid Exit Door Plug, Alaska Airlines Flight 1282

Alaska Airlines 1282

Printed page 123. PDF page 137.

Administration: Once you complete the certification of Boeing Commercial Airplanes' design enhancement for ensuring the complete closure of Boeing 737 mid exit door (MED) plugs following opening or removal, issue an airworthiness directive to require that all in-servic
Open official document at PDF page 137NTSB AIR-25-04: In-Flight Separation of Left Mid Exit Door Plug, Alaska Airlines Flight 1282

Alaska Airlines 1282

Printed page 125. PDF page 139.

Investigation Report AIR-25-04 To The Boeing Company: Continue the certification process for the design enhancement for mid exit door plugs to ensure that, once the design enhancement is certified, all applicable newly manufactured airplanes are equipped with the enhancement. (A-25
Open official document at PDF page 139NTSB AIR-25-04: In-Flight Separation of Left Mid Exit Door Plug, Alaska Airlines Flight 1282