2-1-10. NAVAID MALFUNCTIONS

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  • 2-1-10. NAVAID MALFUNCTIONS

    1. When an aircraft reports a ground-based NAVAID malfunction, take the following actions:
      1. Request a report from a second aircraft.
      2. If the second aircraft reports normal operations, continue use and inform the first aircraft. Record the incident on FAA Form 7230-4 or appropriate military form.
      3. If the second aircraft confirms the malfunction or in the absence of a second aircraft report, activate the standby equipment or request the monitor facility to activate.
      4. If normal operation is reported after the standby equipment is activated, continue use, record the incident on FAA Form 7230-4 or appropriate military form, and notify technical operations personnel (the Systems Engineer of the ARTCC when an en route aid is involved).
      5. If continued malfunction is reported after the standby equipment is activated or the standby equipment cannot be activated, inform technical operations personnel and request advice on whether or not the aid should be shut down. In the absence of a second aircraft report, advise the technical operations personnel of the time of the initial aircraft report and the estimated time a second aircraft report could be obtained.
    2. When an aircraft reports a GPS or WAAS anomaly, request the following information and/or take the following actions:
      1. Record the following minimum information:
        1. (a) Aircraft make, model, and call sign.
        2. (b) Location or position, and altitude at the time where GPS or WAAS anomaly was observed.
        3. (c) Date/time of occurrence.
      2. Request a report from a second aircraft.
      3. Record the incident on FAA Form 7230-4 or appropriate military form.
      4. Inform other aircraft of the anomaly as specified in paragraph 4-8-1j or k, as applicable.
        • PHRASEOLOGY
        • ATTENTION ALL AIRCRAFT, GPS REPORTED UNRELIABLE (OR WAAS UNAVAILABLE) IN VICINITY/AREA (position).
        • EXAMPLE
        • “Attention all aircraft, GPS reported unreliable (or WAAS unavailable) in the area 30 miles south of Waco VOR.”
    3. When a pilot reports a WAAS anomaly, determine from the pilot what indications he or she observes and record the information in accordance with sub-paragraph b above.
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