Chapter 13. NAVAID Monitoring
Section 1. General
13-1-1. PURPOSE
Facility responsibility
for monitoring of NAVAIDs is assigned by the Flight Services Operations Area
Office. Because NAVAIDs and their monitoring equipment are continuously
changing, use the procedures contained in this chapter as they apply.
13-1-2. DUTIES
At facilities assigned
responsibility for monitoring NAVAIDs, check status as part of watch checklist.
13-1-3. MALFUNCTIONS
Take the following action
when an air traffic system component malfunctions:
a. Try to restore
the aid to normal operation, unless Technical Operations Services requests
otherwise.
b. If able to
restore it, record the incident on FAA Form 7230-4.
c. If unable to
restore it, discontinue its use and:
1. Notify the
appropriate IFR control facility/sector.
2. Notify the
appropriate AFSS/FSS as necessary.
3. Notify
maintenance personnel as required.
4. Take appropriate
NOTAM actions.
REFERENCE-
FAAO JO 7210.3, Para 3-5-1, NAVAID Monitoring and FAAO 7930.2
Para 4-2-3, NOTAM for NAVAID in Different FSS Flight Plan Area.
5. Record on FAA
Form 7230-4.
d. If a monitor
indicates a NAVAID malfunction, but aircraft or maintenance personnel report the
NAVAID is operating normally, take actions and make notifications in accordance
with subpara 13-1-3c.
13-1-4. AIRCRAFT REPORTED
MALFUNCTIONS
a. Aircraft
reported NAVAID malfunctions are subject to varying circumstances. When an
aircraft reports a ground-based NAVAID malfunction, take the following action:
1. Request a report
from a second aircraft.
2. If the second
aircraft reports normal operations, continue use and, if able, inform the first
aircraft. Record the incident on FAA Form 7230-4.
3. If the second
aircraft confirms the malfunction or, in the absence of a second aircraft
report, take NAVAID restoral action.
4. If normal
operation is reported after restoral action is taken, continue use, record the
incident on FAA Form 7230-4, and notify appropriate maintenance personnel.
5. If continued
malfunction is reported after restoral action is taken, request advice from
maintenance personnel on whether the NAVAID should be shut down. In the absence
of a second aircraft report, advise maintenance personnel of the time of the
initial aircraft report and the estimated time a second aircraft report could be
obtained.
b. When an aircraft
reports a GPS/GNSS anomaly:
1. Request the
following information:
(a) Aircraft call
sign and type aircraft.
(b) Date and time
of the occurrence.
(c) Location of
anomaly.
(d) Altitude.
2. Record the
incident on FAA Form 7230-4.
3. Forward this
information to the local Traffic Management Unit (TMU) and local Maintenance
Control Center (MCC) personnel.
c. When an aircraft
reports a WAAS anomaly, request the following information and/or take the
following actions:
1. Determine if the
pilot has lost all WAAS service.
EXAMPLE-
"Are you receiving any WAAS service?"
2. If the pilot
reports receipt of any WAAS service, acknowledge the report and continue normal
operations.
3. If the pilot
reports loss of all WAAS service, report as a GPS anomaly using procedures in
paragraph 13-1-4b.
13-1-5. ADJUSTMENTS TO
NAVAIDs
Notify the appropriate air
traffic control facility before any adjustment (including a transmitter change)
to a VOR, TACAN, or DME transmitter is made which might cause a momentary
interruption or an abnormal indication on aircraft instruments.
13-1-6. NAVAID FLIGHT
CHECK
Provide maximum assistance
to aircraft engaged in flight inspection of NAVAIDs. Unless otherwise agreed to,
maintain direct contact with the pilot and provide information regarding known
traffic in the area and request the pilot's intentions.
NOTE-
1. Many flight inspections are accomplished using automatic
recording equipment. An uninterrupted flight is necessary for successful
completion of the mission. The workload for the limited number of aircraft
engaged in these activities requires strict adherence to a schedule.
2. Flight
inspection operations which require special participation of ground personnel,
specific communications, or radar operation capabilities are considered to
require special handling. These flights are coordinated with appropriate
facilities before departure.
13-1-7. MONITORING OF
NAVAIDs BY TECHNICAL OPERATIONS SERVICES PERSONNEL
Maintenance personnel may
assume monitor of any navigational aid provided they coordinate with the
responsible air traffic monitor facility. Record the time on FAA Form 7230-4
that maintenance personnel assume monitor responsibility for each NAVAID and the
time they return monitor responsibility to the facility.
NOTE-
When maintenance personnel silence the monitoring systems of any NAVAID, they
will assume responsibility for the monitoring function.
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