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airborne pilots should periodically monitor these
frequencies to try and detect an activated
121.5/243.0MHz ELT.
b. Testing.
1. ELTs should be tested in accordance with the
manufacturer's instructions, preferably in a shielded
or screened room or specially designed test container
to prevent the broadcast of signals which could
trigger a false alert.
2. When this cannot be done, aircraft operational
testing is authorized as follows:
(a) Analog 121.5/243 MHz ELTs should only
be tested during the first 5 minutes after any hour. If
operational tests must be made outside of this period,
they should be coordinated with the nearest FAA
Control Tower or FSS. Tests should be no longer than
three audible sweeps. If the antenna is removable, a
dummy load should be substituted during test
procedures.
(b) Digital 406 MHz ELTs should only be
tested in accordance with the unit's manufacturer's
instructions.
(c) Airborne tests are not authorized.
c. False Alarms.
1. Caution should be exercised to prevent the
inadvertent activation of ELTs in the air or while they
are being handled on the ground. Accidental or
unauthorized activation will generate an emergency
signal that cannot be distinguished from the real
thing, leading to expensive and frustrating searches.
A false ELT signal could also interfere with genuine
emergency transmissions and hinder or prevent the
timely location of crash sites. Frequent false alarms
could also result in complacency and decrease the
vigorous reaction that must be attached to all ELT
signals.
2. Numerous cases of inadvertent activation
have occurred as a result of aerobatics, hard landings,
movement by ground crews and aircraft maintenance.
These false alarms can be minimized by
monitoring 121.5 MHz and/or 243.0 MHz as follows:
(a) In flight when a receiver is available.
(b) Before engine shut down at the end of
each flight.
(c) When the ELT is handled during installation
or maintenance.
(d) When maintenance is being performed
near the ELT.
(e) When a ground crew moves the aircraft.
(f) If an ELT signal is heard, turn off the
aircraft's ELT to determine if it is transmitting. If it
has been activated, maintenance might be required
before the unit is returned to the “ARMED” position.
You should contact the nearest Air Traffic facility and
notify it of the inadvertent activation.
AIM 2/14/08
6-2-4 Emergency Services Available to Pilots
d. Inflight Monitoring and Reporting.
1. Pilots are encouraged to monitor 121.5 MHz
and/or 243.0 MHz while inflight to assist in
identifying possible emergency ELT transmissions.
On receiving a signal, report the following
information to the nearest air traffic facility:
(a) Your position at the time the signal was
first heard.
(b) Your position at the time the signal was
last heard.
(c) Your position at maximum signal
strength.
(d) Your flight altitudes and frequency on
which the emergency signal was heard: 121.5 MHz or
243.0 MHz. If possible, positions should be given
relative to a navigation aid. If the aircraft has homing
equipment, provide the bearing to the emergency
signal with each reported position.
6-2-6. FAA K-9 Explosives Detection
Team Program
a. The FAA's Office of Civil Aviation Security
Operations manages the FAA K-9 Explosives
Detection Team Program which was established in
1972. Through a unique agreement with law
enforcement agencies and airport authorities, the
FAA has strategically placed FAA-certified K-9
teams (a team is one handler and one dog) at airports
throughout the country. If a bomb threat is received
while an aircraft is in flight, the aircraft can be
directed to an airport with this capability. The FAA
provides initial and refresher training for all handlers,
provides single purpose explosive detector dogs, and
requires that each team is annually evaluated in five
areas for FAA certification: aircraft (widebody and
narrowbody), vehicles, terminal, freight (cargo), and
luggage. If you desire this service, notify your
company or an FAA air traffic control facility.
b. The following list shows the locations of
current FAA K-9 teams:
TBL 6-2-1
FAA Sponsored Explosives Detection
Dog/Handler Team Locations
Airport Symbol Location
ATL Atlanta, Georgia
BHM Birmingham, Alabama
BOS Boston, Massachusetts
BUF Buffalo, New York
CLT Charlotte, North Carolina
ORD Chicago, Illinois
CVG Cincinnati, Ohio
DFW Dallas, Texas
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