Major Inspection — Disassembly ProceduresInspection and Maintenance — GEK 107048
MI-D-5
Operation 5 — How to Remove Inlet Duct Elbow
Note: Due to variations in design of inlet duct work, refer to the Duct Ar-
rangement, Inlet drawing (MLA041) in the Parts Lists and Drawings,
Volume Service Manual for bolting details.
1. Support the elbow to prevent damage to the expansion joint when the elbow is released from the
adjacent duct work.
2. Unbolt the duct work from the elbow and the transition piece.
CAUTION
The inlet duct elbow weighs approximately 7100 pounds
and should be rigged accordingly when lifting.
3. Lift the elbow straight up out of the lagging and set on blocking which supports the throat and aft
gussets. Do not use the expansion joint for support.
4. Unbolt the transition piece from the inlet plenum.
CAUTION
The inlet transition piece weighs approximately 3400
pounds and should be rigged accordingly when lifting.
5. Lift the transition piece from the inlet plenum and set on blocking. Cover the top opening.
Operation 6 — How to Remove the Upper Half of the Inlet Plenum
1. Remove the inlet extension wings on the left and right sides of the plenum.
Note: The inlet plenum extension wings weigh approximately 1600 pounds
and should be rigged accordingly for lifting.
2. Remove and/or disconnect any conduit runs, wiring, CO
2
piping or any other items attached to
the upper half of the forward and aft inlet plenum walls.
3. Unbolt the vertical and horizontal joints on the forward and aft walls.
4. Rig to lift the plenum using two lengths of timber spacing wedged forward to aft on the outer extre-
mities to keep the plenum from disforming when being lifted.
Note: The upper half inlet plenum weighs approximately 1200 pounds and
should be rigged accordingly for lifting.
5. Check to ensure the upper half plenum is mechanically free.
6. Lift the upper half plenum off and set on suitable blocking.
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