Northern Airborne Technology 251 - Manual (Page 20)

ENVIRONMENTAL QUALIFICATION FORM
Description: Passenger Speaker Amplifier Document #: 251\251\521-0
NAT Part #: 251-xxx TSO#: TSO-C50c
Manufacturer’s Specification and/or Other Applicable Specification: RTCA DO-160C
Manufacturer: Wulfsberg Electronics Division
Address: 6400 Wilkinson Drive, Prescott, AZ USA 86301
Prepared By: Checked By: Approved By:
Rev: 1.00 Jul 28, 2009 Page 1 of 2
ENG-FORM: 521-0102.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Conditions Section Description of Conducted Tests
Temperature and Altitude
Low temperature
High temperature
In-flight loss of cooling
Altitude
Decompression
Overpressure 4.0
4.5.1
4.5.2, 4.5.3
4.5.4
4.6.1
4.6.2
4.6.3
Categories A2 and F2
-55°C Operating Low Temperature
+70°C Operating High Temperature
No cooling required
+70,000 feet
+8,000 feet to +55,000 feet
-15,000 feet
Temperature Variation 5.0 Category B
Humidity 6.0 Category A
Operational shocks and crash
safety
Operational shocks
Crash safety 7.0
7.2
7.3
Operational and Crash shocks per DO-160C,
paragraphs. 7.2.1, 7.3.1, 7.3.2 and 7.3.2.2
(without shock mounts)
Equipment meets Operational Shocks
requirement during application of 15g Crash
Shock
Vibration 8.0 Categories C and L (without shock mounts)
Curve L upper test frequency was extended
from 150 Hz to 2000 Hz at 3g PK
Explosion Proofness 9.0 Category X, no test performed
Waterproofness 10.0 Category X, no test performed
Fluids susceptibility 11.0 Category X, no test performed
Sand and dust 12.0 Category X, no test performed
Fungus resistance 13.0 Category X, no test performed