Chapter 4. Inflight Services
Section 1. General
4-1-1. INFLIGHT SERVICES
Inflight services are those provided to or affecting
aircraft inflight or otherwise operating on the airport
surface. This includes services to airborne aircraft,
such as airport advisories, delivery of ATC
clearances, advisories or requests, issuance of
military flight advisory messages, EFAS, NOTAM,
SAR communications searches, flight plan handling,
transcribed or live broadcast, weather observations,
PIREPs, and pilot briefings.
Provide inflight services in accordance with the
procedures in this chapter to aircraft on a “first come, first
served” basis, as circumstances permit.
4-1-2. OPERATIONAL PRIORITY
a. Emergency situations are those where life or
property are in immediate danger. Aircraft in distress
have priority over all other aircraft.
b. Provide priority to civilian air ambulance
flights (call sign “MEDEVAC”). Use of the
MEDEVAC call sign indicates that operational
priority is requested. When verbally requested,
provide priority to AIR EVAC, HOSP, and scheduled
air carrier/air taxi flights. Assist the pilots of
MEDEVAC, AIR EVAC, and HOSP aircraft to avoid
areas of significant weather and turbulent conditions.
When requested by a pilot, provide notifications to
expedite ground handling of patients, vital organs, or
urgently needed medical materials.
c. Provide maximum assistance to search and
rescue (SAR) aircraft performing a SAR mission.
d. Provide special handling as required to expedite
Flight Check and automated flight inspection “Flight
Check (number) Recorded” aircraft.
4-1-3. INFLIGHT WEATHER BRIEFING
Upon request, provide inflight weather briefings, in
accordance with the procedure outlined in Chapter 3,
4-1-4. INFLIGHT EQUIPMENT
a. Inflight equipment malfunctions include partial
or complete failure of equipment which may affect
either safety and/or the ability of the flight to proceed.
b. When a pilot reports a flight equipment
malfunction, determine the nature and extent of any
c. Provide maximum assistance possible consistent with equipment and any special handling
d. Relay to other specialists or facilities who will
handle the aircraft all information concerning the
equipment malfunction on the aircraft and any special
handling requested or being provided.
4-1-5. AIRCRAFTREPORTED NAVAID
a. Aircraftreported NAVAID malfunctions are
subject to varying circumstances. When an aircraft
reports a groundbased NAVAID malfunction, take
the following action:
1. Request a report from a second aircraft.
2. If the second aircraft reports normal
operations, if able, inform the first aircraft. Record
the incident on FAA Form 72304.
3. If the second aircraft confirms the malfunction:
(a) Notify the appropriate IFR control facility
(b) Notify Technical Operations personnel.
(c) Take NOTAM action when requested by
Technical Operations personnel.
(d) Record the incident on FAA Form
4. In the absence of a second aircraft report:
(a) Notify Technical Operations and advise
what time the initial aircraft reported the failure and
when a second aircraft report might be obtained.
(b) Record the incident on FAA Form
b. When an aircraft reports a global positioning
system (GPS)/global navigation satellite system
1. Request the following information:
(a) Aircraft call sign and type of aircraft.
(b) Date and time of the occurrence.
(c) Location of anomaly.
2. Record the incident on FAA Form 72304.
3. Forward this information to the traffic
management unit (TMU) and Technical Operations
c. When an aircraft reports a Wide Area
Augmentation System (WAAS) anomaly, request the
following information and/or take the following
1. Determine if the pilot has lost all WAAS
“Are you receiving any WAAS service?”
2. If the pilot reports receipt of any WAAS
service, acknowledge the report, and continue normal
3. If the pilot reports loss of all WAAS service,
report as a GPS anomaly using procedures in
4-1-6. 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.
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.