Gillfab® 5509

Gillfab® 5509 image


Gillfab® 5509 panel is a light weight, high strength and low smoke aircraft sandwich panel made from unidirectional carbon fiber reinforced phenolic facings bonded to Gillcore® HK para-aramid honeycomb core.


The panel is used as a floor panel for the cockpit, main and emergency electronics bays in Airbus Industrie A380-800 aircraft.


  • Fiberglass facing layer to protect against galvanic corrosion
  • Light weight
  • High strength
  • Low smoke generation
  • Fatigue resistant
  • Recommended service temperature range: up to 180°F (82°C)


5509 Ty I5509 Ty II5509 Ty III
Thickness, inch (mm)0.380 (9.65)
Facings thickness, face/back, inch (mm)0.018/0.013 (0.46/0.33)0.018/0.013 (0.46/0.33)0.032/0.025 (0.81/0.64)
Length, inch (mm)Typical 144 (3,658)
Width, inch (mm)Typical 48 (1,219)
HoneycombGillcore® HK low-densityGillcore® HK medium-densityGillcore® HK low-density


Adhesive: Modified fire retardant phenolic

Core: Gillcore® HK honeycomb

Facings Reinforcement: Unidirectional carbon fiber

Facings Resin System: Phenolic


  • ADET 0096 Ty 1-3

Alternative Gill Products

TGC Product No.Difference
Gillfab® 4505Floor panel with heavy-density Gillcore® HD meta-aramid honeycomb and thicker facings for use in high traffic areas on A318/A319/A320/A321/A330/A340 aircraft.
Gillfab® 4605Floor panel with medium-density Gillcore® HD meta-aramid honeycomb and thinner facings for use in underseat areas on A318/A319/A320/A321/A330/A340 aircraft.

Performance Properties, Typical

The following tests are run in accordance with ADET 0096.

TGC Part Number5509 Ty I5509 Ty II
Weight, psf (kg/m2) 0.463 (2.26) 0.490 (2.39)
Long Beam Bending, lbs (N)Ribbon405 (1,801)414 (1,842)
Transverse438 (1,948)559 (2,485)
Deflection @ 100 lbs, inch (@ 445N, mm)Ribbon0.295 (7.5)0.283 (7.2)
Transverse0.311 (7.9)0.291 (7.4)
Panel Shear, lbs (N)442 (1,965)683 (3,039)
Drum Peel, face/back, in-lbs/3″ width (N/76mm width)47/49 (210/220)53/54 (237/238)
Core Compression, psi (N/mm2)870 (6.0)1,088 (7.5)
Impact Strength, in-lbs (Nm)20.0 (3.5)18.8 (3.3)
Insert Shear, lbs (N)2,096 (9,325)2,176 (9,679)
In-Plane Shear, lbs/in (N/mm)400 (70)468 (82)
Indentation, lbs (N)587 (2,613)589 (2,618)
Warpage, in/ft (mm/m)0.005 (0.4)0.008 (0.7)
Roller Cart, cycles, 40 lbs/wheel (178 N/wheel)No deformation at 80,000 cycleNo deformationat 80,000 cycle
FlammabilityMeet FAR 25.853 Appendix F Part I

Figures shown reflect typical values and should not be used as design specifications.

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