Pt. 25, App. F

14 CFR Ch. I (1-1-19 Edition)

Part V. Test Method To Determine the Smoke
Emission Characteristics of Cabin Materials

Use this test method to evaluate the flammability and flame propagation characteristics of thermal/acoustic insulation when exposed to both a radiant heat source and a
flame.
(a) Definitions.
 - Flame propagation -  means the furthest
distance of the propagation of visible flame
towards the far end of the test specimen,
measured from the midpoint of the ignition
source flame. Measure this distance after
initially applying the ignition source and before all flame on the test specimen is extinguished. The measurement is not a determination of burn length made after the test.

418

VerDate Sep<11>2014

12:50 Apr 30, 2019

Jkt 247046

PO 00000

Frm 00428

Fmt 8010

Sfmt 8002

Y:\SGML\247046.XXX

247046

EC28SE91.077</GPH>

spaschal on DSK3GDR082PROD with CFR

(a) Summary of Method. The specimens
must be constructed, conditioned, and tested
in the flaming mode in accordance with
American Society of Testing and Materials
(ASTM) Standard Test Method ASTM F814-
83.
(b) Acceptance Criteria. The specific optical
smoke density (Ds), which is obtained by
averaging the reading obtained after 4 minutes with each of the three specimens, shall
not exceed 200.

Part VI - Test Method To Determine the Flammability and Flame Propagation Characteristics of Thermal/Acoustic Insulation Materials