Upload
savana-goodie
View
221
Download
1
Tags:
Embed Size (px)
Citation preview
Robert L. SwaimRobert L. Swaim
National Resource Specialist
Aircraft Systems Engineering
National Resource Specialist
Aircraft Systems Engineering
Aft Rig Pin Installed in Ground Tests(First AMM Deviation)
Aft Rig Pin Installed in Ground Tests(First AMM Deviation)
Aft Rig Pin Hole
Control Yoke
Rig Pin HoleIn Floor Structure
Rig PinHole In
Bellcrank(View from aft) (View from forward)
Forward Rig Pin May Miss Bellcrank(Second AMM Deviation)
Forward Rig Pin May Miss Bellcrank(Second AMM Deviation)
Tighten Control Cables(Third AMM Deviation)
Tighten Control Cables(Third AMM Deviation)
Elev
ator
-Dow
n C
able
Eleva
tor-U
p Cab
le
Elev
ator
-Dow
n C
able
Eleva
tor-U
p Cab
le
1. Aft rig pin installed
2. Forward rig pin missed bellcrank
3. Tighten elevator-up cable.
Side of Bellcrank Stopped At Improperly Installed Rig Pin.
(Pin should be inserted
in bellcrank hole.)
Tightening Elevator-Down CableMoved Forward Bellcrank Aft
Tightening Elevator-Down CableMoved Forward Bellcrank Aft
Cable Misrig Altered Relation Between FDR Sensor and Elevator
Cable Misrig Altered Relation Between FDR Sensor and Elevator
Elev
ator
-Dow
n C
able
Eleva
tor-U
p Cab
le
Rig pin holds elevatorIn one position
Turnbuckles alter overall cable lengths
FDR senses shift in column position
Colgan AccidentColgan Accident
CommutAir Incident
(Similar airplane)
(Similar airplane)
Functional Inspections Should Be Required for Critical MaintenanceFunctional Inspections Should Be Required for Critical Maintenance
Robert L. SwaimRobert L. Swaim
National Resource Specialist
Aircraft Systems Engineering
National Resource Specialist
Aircraft Systems Engineering
Pitch Trim Cable Drum Illustration Colgan Air Flight 9446 Investigation
Pitch Trim Cable Drum Illustration Colgan Air Flight 9446 Investigation
Capt yoke full aft
Capt yoke full fwd
Capt yoke mid position
Fwd bellcrank access
Pitch Control Turnbuckles Found In WreckagePitch Control Turnbuckles Found In Wreckage
7.30 InchesAircraft Nose Down (AND)
5.54 InchesAircraft Nose Up (ANU)