ACR&Artex ELT to Nav Interface Boeing - Manual (Page 33)

25-69-11
Page 33 of 58
JUL 28/11
ACR ELECTRONICS, INC / ARTEX PRODUCTS
ABBREVIATED COMPONENT MAINTENANCE MANUAL
-B (453-6501)
TASK 25-69-11-750-803
3. Periodic Testing
SUBTASK 25-69-11-750-001
A. Position Data ELT Self-Test
(1) This is a recommended periodic test.
(2) The following test procedure incorporates the steps necessary to confirm operation of the
ELT/NAV Interface -B into the “Installed Transmitter Test” procedure defined in the applicable
ELT abbreviated component maintenance manual.
(3) This test procedure initiates the ELT self-test routine, a part of which checks for position data.
(4) Perform the following functional check within the first 5 minutes after the hour (UTC), as
required by AC 43.13-1, Chapter 12, § 12-22, Note 3.
(a) Notify any nearby control tower of your intentions.
(b) Turn on the aircraft navigation system and verify it is receiving valid position data.
(c) Verify the ELT/NAV Interface -B is powered up and has at least 30 seconds to initialize.
(d) Tune a receiver, usually the aircraft transceiver, to 121.5 MHz.
NOTE: An AM radio may be used to receive the signal.
(e) Activate the ELT by placing the ELT local switch in the “ON” position. The cockpit panel
status light will stay on steady and the ELT LED will begin flashing continuously.
(f) Listen for 3 audible sweeps on the receiver, which takes about 1 second.
(g) Verify the buzzer sounds immediately upon activation.
(h) Return the ELT local switch to the “OFF” position while paying close attention to ELT LED
activity when the ELT enters the “OFF” condition. If the ELT is working properly, the ELT
LED will stay on for approximately 1 second and then turn off.
(i) Refer to Table 6, on page 38, if the LED displays a 5-flash error, which indicates the ELT
is not receiving position data.
NOTE: Refer to the troubleshooting guide in the applicable ELT abbreviated
component maintenance manual for a complete breakdown of error codes,
causes, and possible solutions.
(5) If verification of the position data contained in the 406 MHz message is desired, perform the
post-installation position data functional test in SUBTASK 25-69-11-750-001, on page 34.