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Robert L. Swaim

Robert L. Swaim. National Resource Specialist Aircraft Systems Engineering. Aft Rig Pin Installed in Ground Tests (First AMM Deviation). Aft Rig Pin Hole. Forward Rig Pin May Miss Bellcrank (Second AMM Deviation). Control Yoke. Rig Pin Hole In Floor Structure. Rig Pin Hole In

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Robert L. Swaim

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  1. Robert L. Swaim National Resource Specialist Aircraft Systems Engineering

  2. Aft Rig Pin Installed in Ground Tests(First AMM Deviation) Aft Rig Pin Hole

  3. Forward Rig Pin May Miss Bellcrank(Second AMM Deviation) Control Yoke Rig Pin Hole In Floor Structure Rig Pin Hole In Bellcrank (View from aft) (View from forward)

  4. Tighten Control Cables(Third AMM Deviation) 1. Aft rig pin installed Elevator-Down Cable 2. Forward rig pin missed bellcrank Elevator-Up Cable Elevator-Down Cable Elevator-Up Cable 3. Tighten elevator-up cable.

  5. Tightening Elevator-Down CableMoved Forward Bellcrank Aft Side of Bellcrank Stopped At Improperly Installed Rig Pin. (Pin should be inserted in bellcrank hole.)

  6. Cable Misrig Altered Relation Between FDR Sensor and Elevator Rig pin holds elevator In one position Elevator-Down Cable Turnbuckles alter overall cable lengths Elevator-Up Cable FDR senses shift in column position

  7. Colgan Accident (Similar airplane) CommutAir Incident (Similar airplane)

  8. Functional Inspections Should Be Required for Critical Maintenance

  9. Robert L. Swaim National Resource Specialist Aircraft Systems Engineering

  10. Pitch Trim Cable Drum Illustration Colgan Air Flight 9446 Investigation

  11. Capt yoke full aft Capt yoke mid position Fwd bellcrank access Capt yoke full fwd

  12. Pitch Control Turnbuckles Found In Wreckage 7.30 Inches Aircraft Nose Down (AND) 5.54 Inches Aircraft Nose Up (ANU)

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