TT31 Transponder Installation Manual
8 May 2017
00455-00
Issue AQ
______________________
Trig Avionics Limited
Page 29
11. Environmental Qualification Form
Nomenclature
TT31 Mode S Transponder
Part Number:
00220-(XX)
ETSO:
2C112b
Manufacturer
Trig Avionics Limited
Address
Heriot Watt Research Park, Riccarton, Currie, Scotland, EH14 4AP
Conditions
DO-160D
Section
Description of Conducted Tests
Temperature and Altitude
4.0
Equipment tested to Categories A1, C1
Low temperature ground survival
4.5.1
-55°C
Low temperature operating
4.5.1
-20°C
High temperature operating
4.5.3
+55°C
High temperature short-time operating
4.5.2
+70°C
High temperature ground survival
4.5.2
+85°C
Loss of Cooling
4.5.4
Cooling air not required (+70°C operating without cooling air)
Altitude
4.6.1
35,000 feet
Decompression
4.6.2
8,000 to 35,000 feet in 15 seconds
Overpressure
4.6.3
-15000 feet
Temperature Variation
5.0
Equipment tested to Category C
Humidity
6.0
Equipment tested to Category A
Operational Shocks
7.2
Equipment tested to Category B
Crash Safety
7.3
Equipment tested to Category B and extended to use test
levels for Helicopters
Vibration
8.0
Aircraft zone 2; type 3, 4, 5 to category S level M
Equipment at strike-off level 3 also tested for aircraft zone 2;
type 1 (Helicopters) to category U level G
Explosion
9.0
Equipment identified as Category X
– no test required
Waterproofness
10.0
Equipment identified as Category X
– no test required
Fluids Susceptibility
11.0
Equipment identified as Category X
– no test required
Sand and Dust
12.0
Equipment identified as Category X
– no test required
Fungus
13.0
Equipment identified as Category X
– no test required
Salt Spray
14.0
Equipment identified as Category X
– no test required
Magnetic Effect
15.0
Equipment tested to Category Z
Power Input
16.0
Equipment tested to Category B
Voltage Spike
17.0
Equipment tested to Category B
Audio frequency conducted susceptibility
18.0
Equipment tested to Category B
Induced signal susceptibility
19.0
Equipment tested to Category A
Radio frequency susceptibility
20.0
Equipment tested to Category T
Radio frequency emission
21.0
Equipment tested to Category B
Lightning induced transient susceptibility
22.0
Equipment identified as Category XXXX
– no test required
Lightning direct effects
23.0
Equipment identified as Category X
– no test required
Icing
24.0
Equipment identified as Category X
– no test required
Electrostatic Discharge
25.0
Equipment identified as Category X
– no test required
