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Sealing of Integral Fuel Tanks

2016-11-23
CURRENT
AIR4069C
This SAE Aerospace Information Report (AIR) presents preferred design, assembly, and repair practices for sealing of aircraft integral fuel tanks, including rework of applied fuel tank seals. It addresses engineering designs for integral fuel tanks as they are currently found in practice; and discusses the most practical and conservative methods for producing a reliable, sealed system. Although this AIR presents practices for sealing of integral fuel tanks, the practices presented within this report are practices that are carried throughout sealing that include both pressure and environmental aircraft sealing. Design preferences for optimum sealing are not within the scope of this document. Such discussions can be found in the United States Air Force (USAF) sponsored report, entitled Aircraft Integral Fuel Tank Design Handbook, AFWAL-TR-87-3078.
Standard

Sealing Compound, Low Adhesion, Corrosion Inhibiting, 9,000 to 14,000 Poises (900 to 1400 Pa⋅s), 1/2 Hour Application Time (B-1/2)

1992-04-01
HISTORICAL
AMS3267/2
This specification covers accelerated curing synthetic rubber compounds with corrosion inhibitors and low adhesive strength supplied as a two-component system. This product has been used typically for sealing aircraft access doors and accessories where gaskets are required, but usage is not limited to such applications. Compound is classified as a B-1/2 sealing compound; the compound being suitable for application by an extrusion gun or spatula with a minimum application time of 1/2 hour after mixing.
Standard

Sealing Compound, Low Adhesion, Corrosion Inhibiting, 9,000 to 14,000 Poises (900 to 1400 Pa⋅s), 1/2 Hour Application Time (B-1/2)

1992-04-01
HISTORICAL
AMS3267/2A
This specification covers accelerated curing synthetic rubber compounds with corrosion inhibitors and low adhesive strength supplied as a two-component system. This product has been used typically for sealing aircraft access doors and accessories where gaskets are required, but usage is not limited to such applications. Compound is classified as a B-1/2 sealing compound; the compound being suitable for application by an extrusion gun or spatula with a minimum application time of 1/2 hour after mixing.
Standard

Sealing Compound, Low Adhesion, Corrosion Inhibiting, for Removable Panels and Fuel Tank Inspection Plates

2004-07-22
CURRENT
AMS3267B
This specification and its supplementary detail specifications cover accelerated curing synthetic rubber compounds with corrosion inhibitors and low adhesive strength, supplied as a two-component system, curing at room temperature. This product has been used typically for sealing aircraft access doors and accessories where gaskets are required, but usage is not limited to such applications. The sealing compounds are resistant to both jet fuels and high aromatic aviation gasolines and are useable from -55 to +120 degrees C (-67 to +249 degrees F).
Standard

Sealing Compound, Polythioether Nonchromated, Corrosion Inhibiting for Intermittent Use to 360°F (182°C)

2005-07-25
CURRENT
AMS3259B
This specification covers a polythioether sealing compound with nonchromated corrosion inhibitors supplied as a two-component system which cures at room temperature. The compound has been used typically for faying surface sealing and for wet-installation of fasteners in aircraft structural joints, but usage is not limited to such applications. This compound is also suitable for fillet sealing and overcoating fasteners in nonfuel areas. The sealing compounds are usable from -65 to +320 degrees F (-54 to +160 degrees C) with short term (six hour) exposures up to 36 degrees F (182 degrees C).
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