25-20 Seat Assemblies and Back Rests
Refer to R66 Illustrated Parts Catalog (IPC) Figure 25-1.
25-21 Seat Assembly Removal and Installation
WARNING
Never repair or modify seat assemblies, including seat assembly
fabric, seat pans, or hook and loop tape (Velcro) securing fabric
to seat pans. Seat assembly energy-absorption design is critical
to occupant safety. To preserve crashworthiness, maintenance
is limited to seat assembly replacement.
A. Seat Assembly
1. Refer to Figure 25-1. Remove or install hardware securing forward hinge to seat
box.
B. Center Seat Assembly
1. Refer to Figure 25-1. Center seat assembly attaches and detaches to and from the seat
box via hook and loop tape (Velcro).
25-22 Back Rest Assembly Removal and Installation
A. Aft Left and Right Back Rest Assembly
1. Refer to Figure 25-1. Remove or install hardware securing back rest assembly to
cabin bulkhead.
B. Center Back Rest Assembly
1. Refer to Figure 25-1. Detach back rest assembly hook and loop tape (Velcro) at
bottom; slide back rest assembly up and out of keyhole slots.
2. Install back rest assembly in keyhole slots and slide down. Press firmly on back rest
assembly hook and loop tape (Velcro) at bottom. Verify security.
25-23 Back Rest Cushion Replacement
A. Forward Back Rest
1. Refer to Figure 25-1. Drill out rivets securing back rest cushion to seat back panel
and deburr holes. Remove cushion.
2. Remove old adhesive residue from back rest support tube with plastic wedge. Wipe
surface with clean cloth, wet with acetone.
3. Center and straighten new cushion on seat back panel. Match drill seat back panel
#30 holes through cushion panel and deburr. Clean up debris.
4. Attach back rest cushion to seat back panel with rivets.
5. Apply B270-18 adhesive to underside of back rest cushion flap and to mating portion
of support tube. Pull flap around tube, smooth wrinkles, and trim excess flap.
Remove excess adhesive prior to curing.
SEP 2012 R66 Maintenance Manual Chapter 25 Furnishings Page 25.5
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