Aeronautical Information Manual (AIM), page 326

Index   325 -- Page 326 -- 327

expected to advise the controller if in disagreement with
position given. Any pilot who cannot confirm the accuracy
of the position given because of not being tuned to the
NAVAID referenced by the controller, should ask for
another radar position relative to the tuned in NAVAID.

d. Position Report Items:
1. Position reports should include the follow-
ing items:
(a) Identification;

(b) Position;
(c) Time;

(d) Altitude or flight level (include actual

altitude or flight level when operating on a clearance

specifying VFR-on-top);

(e) Type of flight plan (not required in IFR
position reports made directly to ARTCCs or

approach control);
(f) ETA and name of next reporting point;

(g) The name only of the next succeeding
reporting point along the route of flight; and
(h) Pertinent remarks.

5-3-3. Additional Reports

a. The following reports should be made to
ATC or FSS facilities without a specific ATC

1. At all times.
(a) When vacating any previously assigned
altitude or flight level for a newly assigned altitude or
flight level.
(b) When an altitude change will be made if
operating on a clearance specifying VFR-on-top.

(c) When unable to climb/descend at a rate of
a least 500 feet per minute.

(d) When approach has been missed.

(Request clearance for specific action; i.e., to

alternative airport, another approach, etc.)
(e) Change in the average true airspeed (at
cruising altitude) when it varies by 5 percent or
10 knots (whichever is greater) from that filed in the
flight plan.

(f) The time and altitude or flight level upon
reaching a holding fix or point to which cleared.

the (g) When leaving any assigned holding fix or

The reports in subparagraphs (f) and (g) may be omitted by
pilots of aircraft involved in instrument training at military
terminal area facilities when radar service is being
(h) Any loss, in controlled airspace, of VOR,
TACAN, ADF, low frequency navigation receiver
capability, GPS anomalies while using installed
IFR-certified GPS/GNSS receivers, complete or
partial loss of ILS receiver capability or impairment
of air/ground communications capability. Reports

should include aircraft identification, equipment

affected, degree to which the capability to operate

under IFR in the ATC system is impaired, and the
nature and extent of assistance desired from ATC.

1. Other equipment installed in an aircraft may effectively
impair safety and/or the ability to operate under IFR. If
such equipment (e.g., airborne weather radar) malfunc-
tions and in the pilot's judgment either safety or IFR
capabilities are affected, reports should be made as above.
2. When reporting GPS anomalies, include the location
and altitude of the anomaly. Be specific when describing
the location and include duration of the anomaly if

(i) Any information relating to the safety of

2. When not in radar contact.
(a) When leaving final approach fix inbound
on final approach (nonprecision approach) or when
leaving the outer marker or fix used in lieu of the outer
marker inbound on final approach (precision

(b) A corrected estimate at anytime it
becomes apparent that an estimate as previously
submitted is in error in excess of 2 minutes. For

flights in the North Atlantic (NAT), a revised

estimate is required if the error is 3 minutes or more.

b. Pilots encountering weather conditions which
have not been forecast, or hazardous conditions
which have been forecast, are expected to forward a
report of such weather to ATC.
AIM, Paragraph 7-1-19 , Pilot Weather Reports (PIREPs)
14 CFR Section 91.183(B) and (C).

5-3-4 En Route Procedures

Page 326 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   325 -- Page 326 -- 327