Calculations are shown in paragraph (f) of this part IV. Specimens must be mounted in a metal frame so that the two long edges and the upper edge are held securely during the vertical test prescribed in subparagraph (4) of this paragraph and the two long edges and the edge away from the flame are held securely during the horizontal test prescribed in subparagraph (5) of this paragraph. The calorimeter must be a one-inch cylindrical water-cooled, total heat flux density, foil type Gardon Gage that has a range of 0 to 5 BTU/ft 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. The fuel supplied to the burner must be methane mixed with air in a ratio of approximately 50/50 by volume. 1/8 inches (51 ±3 mm) thick, exclusive of fabric closures and seam overlap. Provide a stopwatch or other device, accurate to ±1 second/hour, to measure the time of application of the pilot burner flame. 1/8 inches (102 ±3 mm) from one side of the specimen mounting stand. 3/min (2.29 m The test may be terminated earlier if flame penetration is observed. (g) Report. An exhaust stack, 5.25 × 2.75 inches (133 × 70 mm) in cross section, and 10 inches (254 mm) long, fabricated from 28 guage stainless steel must be mounted on the outlet of the pyramidal section. ), (2) Position the air velocity meter in the adapter or airbox, making certain that no gaps exist where air could leak around the air velocity measuring device. The average temperature of each of the 7 thermocouples should be 1900 °F ±100 °F (1038 ±56 °C). The radiant panel must be 3-phase and operate at 208 volts. (i) The calorimeters must be a total heat flux, foil type Gardon Gage of an appropriate range such as 0-5 Btu/ft The cone must have an opening 6 ±0.125-inch (152 ±3 mm) high and 11 ±0.125-inch (280 ±3 mm) wide (see figure 3). c. Section 29.853 of Part 29 of the FAR - Compartment Interiors. Test specimens must include all materials used in construction of the insulation (including batting, film, scrim, tape etc.). It must also be the same distance from the centerline of the second hole to the centerline of the third hole. With film/fiberglass assemblies, it is critical to make a slit in the film cover to purge any air inside. The average burn length may not exceed 6 inches and the average flame time after removal of the flame source may not exceed 15 seconds. (B) The standardized transducer must meet the specifications given in paragraph VI(b)(6) of this appendix. must be set and increased to higher preset flows of 4, 6, 8, 6 and 4 liters/min. … The end of the injection rod must be threaded to screw into the nut, and a .020 inch (5.1 mm) thick wide area washer must be held between two (6) Record the time at which flame penetration occurs if applicable. Turn on the blower portion of the burner without turning the fuel or igniters on. (f) Calibration. 1/2 inches (327 by 470 mm). (1) The test specimens must be representative of the aircraft component in regard to materials and construction methods. (ii) A cargo or baggage compartment defined in § 25.857 as Class B or E must have a liner constructed of materials that meet the requirements of paragraph (a)(1)(ii) of part I of this appendix and separated from the airplane structure (except for attachments). The mounting stand should also include a suitable drip pan lined with aluminum foil, dull side up. The thermocouple rake and the calorimeter should be used frequently to maintain and record calibrated test parameters. (3) Turn on the burner, allow it to run for 2 minutes for warm-up, and adjust the damper to produce a calorimeter reading of 8.0 ±0.5 BTU per ft. The middle hole must be in the vertical plane perpendicular to the exposed surface of the specimen which passes through its vertical centerline and must be pointed toward the radiation source. (10) Timing device. (8) Burn length. (2) Place the test specimen in the sliding platform holder. The calorimeter must be mounted in a 6 inch by 12 inch (152 by 305 mm) by The specimen of wire or cable (including insulation) must be placed at an angle of 60° with the horizontal in the cabinet specified in subparagraph (3) of this paragraph with the cabinet door open during the test, or must be placed within a chamber approximately 2 feet high by 1 foot by 1 foot, open at the top and at one vertical side (front), and which allows sufficient flow of air for complete combustion, but which is free from drafts. For each compartment occupied by the crew or passengers, the following apply: (a) Materials (including finishes or decorative surfaces applied to the materials) must meet the applicable test criteria prescribed in part I of appendix F of this part, or other approved equivalent methods, regardless of the passenger capacity of the … In the case of fabrics, both the warp and fill direction of the weave must be tested to determine the most critical flammability condition. Use a solid-state power controller and microprocessor-based controller to set the electric panel operating parameters. Move the burner into the calibration position and allow 1 minute for thermocouple stabilization, then record the temperature of each of the 7 thermocouples once every second for a period of 30 seconds. DOT/FAA/RD/76/213, Reevaluation of Burner Characteristics for Fire Resistance Tests, dated January 1977. 1/8 inch (3.2 mm) flat stock steel and have an opening that accommodates a (iv) Installation on test frame. (3) Rotate the burner from the test position to the warm-up position. (5) If the calorimeter and thermocouples do not read within range, repeat steps in paragraphs 1 through 4 and adjust the burner air intake damper until the proper readings are obtained. Information Security Program B. See figure 7. 1/8 inches (610 ±3 mm). Calculate the average temperature of each thermocouple over this 30-second period and record. (5) Position the burner in front of the thermocouple rake. Use propane (liquid petroleum gas - 2.1 UN 1075) for the radiant panel fuel. 2), accurate to ±3% of the indicated reading. (ii) Gas radiant panel. Insulation blanket specimen means one of two specimens positioned in either side of the test rig, at an angle of 30° with respect to vertical. 2-sec. The burn length determined in … (I) The recording device used must record the 2 transducers simultaneously or at least within (6) Turn off the burner and remove the thermocouple rake. 3/4-inch above the top of the burner. Each specimen must be supported vertically. 1/2 inches in height. Flame characteristics are highly dependent on actual burner setup. Locations of the holes in the pads and stainless steel cover plates are shown in Figure 2B of this part IV. Reinstall the draft tube extension cone. Appendix E to Part 25 Title 14 - Aeronautics and Space. Three or more specimens representing the completed aircraft component are tested. If smoking is allowed in any area occupied by the crew or passengers, an adequate number of self-contained, removable ashtrays must be provided in designated smoking sections for all seated occupants. 3/min. (21 °C. 2-sec (2.27 W/cm If, however, several blanket types use similar insulation combinations, it is not necessary to test each combination if it is possible to bracket the various combinations. 1/8 inches (102 ±3 mm) from the exit of the burner cone. 1/8 inch (191 mm ±3) below the radiant panel. (1) Specimen preparation. For example, if a polyimide film is used in conjunction with an insulation in order to enhance the burnthrough capabilities, also test the same insulation when used with a polyvinyl fluoride film. (1) The calibration factor is calculated as follows: (2) Heat release rates may be calculated from the reading of the thermopile output voltage at any instant of time as: (3) The integral of the heat release rate is the total heat release as a function of time and is calculated by multiplying the rate by the data sampling frequency in minutes and summing the time from zero to two minutes. These items need to comply with 14 CFR 25.853 (a) Appendix F Part I (a)(I)(ii) per the installed configuration, i.e., composite panels. (2) Mount the test specimen on the test stand shown in Figure 1 in either the horizontal or vertical position. This allows the operator to maintain the proper test specimen position (level with the top of the platform) and to allow ventilation of gases during testing. The arrangement of the test apparatus, which is shown in Figure 3 of Part II and Figures 1 through 3 of this part of appendix F, must include the components described in this section. A mixture of 120 cm The bottom of the test chamber must be a sliding steel platform that has provision for securing the test specimen holder in a fixed and level position. The front surface of the specimen must be 3.9 inches (100 mm) from the closed radiation doors after injection. (1) The power supply to the radiant panel must be set to produce a radiant flux of 3.5 ±.05 W/cm 3/4 inch (19 mm) guide (such as a thin strip of metal) may be soldered to the top of the burner to aid in setting the flame height. It may be necessary (due to compression) to adjust the sample (up or down) in order to maintain the distance from the sample to the radiant panel (7 TM commercial propane venturi torch with an axially symmetric burner tip and a propane supply tube with an orifice diameter of 0.006 inches (0.15 mm). Standards for Safeguarding Customer Information A. (2) After the pilot flames are lighted, their position must be checked as described in paragraph (b)(8) of this part IV. Part 135 Aircraft do require that the seats in these aircraft meet 14 CFR 25.853 (c). 1/16 inch thick (3.2 ±1.6 mm). 14:1.0.1.3.12.12.121.1.19 : Appendix N Appendix N to Part 25 - Fuel Tank Flammability Exposure and Reliability Analysis N25.1 General. 1/2-inch in thickness. A detachable .50 × 50 × 5.91 inch (12 × 12 × 150 mm) drip pan and two .020 inch (.5 mm) stainless steel wires (as shown in Figure 3 of this part IV) must be used for testing materials prone to melting and dripping. (g) Criteria. 1/2 inches (318mm) wide by 23 inches (584mm) long. (iii) Optional Fourteen-Hole Upper Pilot Burner. Use caution as the fixture is very hot. A minimum of three specimens must be tested and the results averaged. (4) For at least two-thirds of the total number of specimen sets tested, the burn length from the burner must not reach the side of the cushion opposite the burner. (5) When testing ceiling liner panels, record the peak temperature measured 4 inches above the sample. The cold junctions must be located in the pan below the lower air distribution plate (see paragraph (b)(4) of this part IV). (3) The initial weight and residual weight of each set, the calculated percentage weight loss of each set, and the calculated average percentage weight loss for the total number of sets tested. (4) Thermocouples. 1/8 inches (508 ±3 mm) deep by 4 ± (c) In addition to meeting the requirements of paragraph (a) of this section, seat cushions, except those on flight crewmember seats, must meet the test requirements of part II of appendix F of this part, or other equivalent methods, regardless of the passenger capacity of the airplane. (3) Electrical system components. If the platform has been fabricated such that the back side of the platform is high enough to prevent excess preheating of the specimen when the sliding platform is out, a retainer board is not necessary. Prepare a minimum of three specimen sets of the same construction and configuration for testing. (See Figure 1B of this part IV.) The total air flow to the equipment is approximately .04 m The minimum flame temperature measured by a calibrated thermocouple pyrometer in the center of the flame must be 1550 °F. Make each of the specimens tested using the principal components (i.e., insulation, fire barrier material if used, and moisture barrier film) and assembly processes (representative seams and closures). Without disturbing the calorimeter position, rotate the burner in front of the thermocouple rake, such that the middle thermocouple (number 4 of 7) is centered on the burner cone. To ensure the proper thermal output of the burner, the following test must be made: (1) Place the calorimeter on the test stand as shown in Figure 4 at a distance of 4 ± 59 drill holes must be drilled into the tubing, .50 inch (13 mm) apart, for gas ports, all radiating in the same direction. * 12 second vertical ignition IAW 14 CFR 25.853(a), Amendment 25-83, Appendix F, Part I, Paragraph (a)(1)(ii) when tested per 14 CFR Part 25 … 2). 2). The burner must be mounted underneath the test mark on the specimen, perpendicular to the specimen and at an angle of 30° to the vertical plane of the specimen. (3) Place the retaining/securing frame over the test specimen. The burner must have a nominal bore of (2) Radiant heat source. (F) Center the 2 transducers on opposite sides of the plates at equal distances from the plate. The frame must be 13 All exterior surfaces of the apparatus, except the holding chamber, must be insulated with 1 inch (25 mm) thick, low density, high temperature, fiberglass board insulation. Except for small parts and electrical wire and cable insulation, materials must be tested either as section cut from a fabricated part as installed in the airplane or as a specimen simulating a cut section, such as a specimen cut from a flat sheet of the material or a model of the fabricated part. The insulation blankets should be attached to the test rig center vertical former using four spring clamps positioned as shown in figure 7 (according to the criteria of paragraph paragraph (c)(3)(iv) of this part of this appendix). Ensure that the horizontal centerline of the burner cone is also offset 1 inch below the horizontal centerline of the thermocouple tips. The board must have three 1-inch (25.4 mm) diameter holes drilled through the board for calorimeter insertion. Burn length is the distance from the original edge to the farthest evidence of damage to the test specimen due to flame impingement, including areas of partial or complete consumption, charring, or embrittlement, but not including areas sooted, stained, warped, or discolored, nor areas where material has shrunk or melted away from the heat source. The flame may not penetrate (pass through) the material during application of the flame or subsequent to its removal. The fuel flow rate must be 6.0 ±0.2 gallons per hour (0.378 ±0.0126 L/min). Except as noted below, the specimen thickness must be no thicker than the minimum thickness to be qualified for use in the airplane. For each compartment occupied by the crew or passengers, the following apply: (a) Materials (including finishes or decorative surfaces applied to the materials) must meet the applicable test criteria prescribed in part I of appendix F of this part, or other approved equivalent methods, regardless of the passenger capacity of the airplane. (i) For batt-type materials such as fiberglass, the constructed, finished blanket specimen assemblies must be 32 inches wide by 36 inches long (81.3 by 91.4 cm), exclusive of heat sealed film edges. (3) As noted in paragraph (b)(2) of this part IV, thermopile hot junctions must be cleared of soot deposits as needed to maintain the calibrated sensitivity. 3A, Standard Fire Test Apparatus and Procedure for Flexible Hose Assemblies, dated March 1978; however, the test settings specified in this appendix differ in some instances from those specified in the report. Appendix E to Part 25. (h) Test Report. (3) Apparatus. (1) Mount a thermocouple of the same type as that used for calibration at a distance of 4 inches (102 mm) above the horizontal (ceiling) test specimen. “Radiant heat source” means an electric or air propane panel. The lower edge of the specimen must be Drippings from the test specimen may not continue to flame for more than an average of 5 seconds after falling. 2), accurate to ±3% of the indicated reading. Except as provided in subparagraph (7) of this paragraph, tests must be conducted in a draft-free cabinet in accordance with Federal Test Method Standard 191 Model 5903 (revised Method 5902) for the vertical test, or Method 5906 for horizontal test (available from the General Services Administration, Business Service Center, Region 3, Seventh & D Streets SW., Washington, DC 20407). Mount the test mark film/fiberglass assemblies, it is at least two-thirds of the seven thermocouples reads °F! 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