Bosch Telex Ascend Manual page 3

Ascend
FAA
The Telex Ascend Headset (with or without microphone) is approved for aircraft use under FAA TSO-C139.
The conditions and tests required for the TSO approval of this article are minimum performance standards. It is the responsibility of those
installing this article, either on or within a specific type or class of aircraft, to determine that the aircraft installation conditions are within the
TSO standards. TSO articles may have separate approval for installation on aircraft. The article may be installed only if performed under 14
CFR part 43 or the applicable air-worthiness requirements.
The Telex Ascend Headset is TSO-C139 approved. Tests were conducted using RTCA DO-214 and DO-160E. The headset was designed and
is manufactured to meet the following environmental categories:
CONDITIONS
Temperature and Altitude
Low Temperature
High Temperature
In-Flight Loss of Cooling
Altitude
Decompression
Overpressure
Temperature Variation
Humidity
Operational Shock and Crash Safety 7.0
Vibration
Explosive Atmosphere
Waterproofness
Fluids Susceptibility
Sand and Dust
Fungus
Salt Fog Test
Magnetic Effect
Power Input
Voltage Spike
Audio Frequency Susceptibility
Induced Signal Susceptibility
Radio Frequency Susceptibility
Transient RF
Sustained Ambient RF
Radio Frequency Emission
Lightning Induced Transient
Susceptibility
Lightning Direct Effects
Icing
Electrostatic Discharge
Fire, Flammability
Other Tests
Bosch Security Systems, Inc.
DO-160E SECTION
4.0
4.5.1 Equipment tested to Category A1
4.5.2 & 3 Equipment tested to Category A1 with 70°C max. exception
by DO-214 2.5.1.2
4.5.4 Equipment identified as Category X, N/A
4.6.1 Equipment tested to Category A1
4.6.2 Equipment tested to Category A1/45000ft.
4.6.3 Equipment tested to Category A1
5.0 Equipment tested to Category C
6.0 Equipment tested to Category A
Equipment identified as Category X, N/A by DO-214 2.5.4.1 and 2.5.4.2
8.0 Equipment tested to Category S, aircraft zone 2 (instrument panel
or console mounting), Aircraft type 2 (Fixed Wing Turbojet or Turbofan
engines), using vibration test curve B.
9.0 Equipment identified as Category X, N/A
10.0 Equipment identified as Category X, N/A
11.0 Equipment identified as Category X, N/A
12.0 Equipment identified as Category X, N/A
13.0 Equipment identified as Category X, N/A
14.0 Equipment identified as Category X, N/A
15.0 Equipment is Category Z
16.0 Equipment identified as Category X, N/A by DO-214 2.5.7.1
17.0 Equipment tested to Category A
18.0 Equipment identified as Category X, N/A by DO-214 2.5.9
19.0 Equipment tested to Category A
20.0
Equipment tested to Category T
Equipment tested to DO-214 2.5.11.2
21.0 Equipment tested to Category M
22.0 Equipment identified as Category XXXXX, N/A by DO-214 2.5.13
23.0 Equipment identified as Category X, N/A
24.0 Equipment identified as Category X, N/A
25.0 Equipment identified as Category X, N/A by DO-214
26.0 Equipment identified as Category X, N/A by DO-214
Fire resistance tests were conducted in accordance with Federal Aviation
Regulations Part 25, Appendix F.
Technical Manual
DESCRIPTION OF TESTS CONDUCTED
F.01U.196.221
3
Rev. 08