Boeing B737 - 1. General - Removal and Installation; Scope and Safety Precautions; 2. Equipment and Materials; Required Tools and Supplies

B737
MAINTENANCE MANUAL
EFFECTIVITY
Post ELT STC ST03081AT
23-24-02
PAGE 401
JAN 02/07
EMERGENCY LOCATOR TRANSMITTER SYSTEM
REMOVAL AND INSTALLATION
1. General
A.
This section provides instructions for removing and installing each of the ARTEX C406-1 ELT
system LRU’s.
CAUTION: SHOULD ANY INSTALLATION CRITICAL CASES ARISE WITH THE
REINSTALLATION OF ANY UNIT, YOU MUST COMPLY 100 PERCENT WITH
THE INSTRUCTIONS.
B.
When removing or installing any ARTEX C406-1 ELT LRU, prepare the aircraft for safe ground
maintenance. Open and tag all applicable system circuit breakers.
2. Equipment and Materials
A.
No special equipment or materials, other y=than those commonly used in the shop, are required
to install the units in existing trays and clamps. Do not over tighten mounting screws.
3. ELT Transmitter Removal and Installation Procedure
A.
Removal and Installation Procedure
(1)
Remove the ELT Transmitter.
(a)
Gain access to the ELT Transmitter.
(b)
Loosen the thumbscrews on the end cap.
(c) Pull the end cap away from the ELT. Lift up the Protective Top Cover and push away
from the connector end of the ELT to remove. Lay Protective Top Cover aside.
(d)
Remove all interconnections to the ELT unit and ELT antenna.
(e) Lift the ELT up from the connector end (careful use of a flat blade screw driver as a
lever makes this step easier) to remove the ELT unit from its mounting tray.
(f) Place electrostatic protective covers on the ELT Transmitter and the electrical
connectors.
(2)
Install the ELT Transmitter.
(a) Remove electrostatic protective covers from the aircraft connectors. Remove
electrostatic protective covers from the ELT Transmitter electrical connectors.
CAUTION: EXAMINE THE CONNECTOR FOR PINS THAT ARE BENT OR OUT OF
ALIGNMENT. DO NOT FORCE FIT IF MATING IS DIFFICULT.
(b) Insert the ELT into the mounting tray at an angle so that the locking ears at the end
opposite the direction-of-flight arrow fit into the mounting tray locking slots.
(c)
Fit the protective top cover onto the ELT.
(d) Ensure that the slots at the end of cover fit over the locking ears on the ELT prior to
fitting cover into place at the connector end.