404 

14 CFR Ch. I (1–1–19 Edition) 

Pt. 25, App. F 

(6) Turn off the burner and remove the 

thermocouple rake. 

(7) Repeat (1) to ensure that the burner is 

in the correct range. 

(g) 

Test Procedure. 

(1) Mount a thermo-

couple of the same type as that used for cali-
bration at a distance of 4 inches (102 mm) 
above the horizontal (ceiling) test specimen. 
The thermocouple should be centered over 
the burner cone. 

(2) Mount the test specimen on the test 

stand shown in Figure 1 in either the hori-
zontal or vertical position. Mount the insu-
lating material in the other position. 

(3) Position the burner so that flames will 

not impinge on the specimen, turn the burn-
er on, and allow it to run for 2 minutes. Ro-
tate the burner to apply the flame to the 
specimen and simultaneously start the tim-
ing device. 

(4) Expose the test specimen to the flame 

for 5 minutes and then turn off the burner. 

The test may be terminated earlier if flame 
penetration is observed. 

(5) When testing ceiling liner panels, 

record the peak temperature measured 4 
inches above the sample. 

(6) Record the time at which flame pene-

tration occurs if applicable. 

(h) 

Test Report. 

The test report must in-

clude the following: 

(1) A complete description of the materials 

tested including type, manufacturer, thick-
ness, and other appropriate data. 

(2) Observations of the behavior of the test 

specimens during flame exposure such as 
delamination, resin ignition, smoke, ect., in-
cluding the time of such occurrence. 

(3) The time at which flame penetration 

occurs, if applicable, for each of the three 
specimens tested. 

(4) Panel orientation (ceiling or sidewall). 

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