INSTRUMENT FLIGHT RULES WORKBOOK
"HOUSTON CENTER, NAVY 6E432, LEAVING ONE SIX THOUSAND FOR EIGHT
Advise ATC anytime cruising true airspeed varies plus or minus 5 percent, or 10 knots,
whichever is greater, from that given in the flight plan. When complying with speed adjustments
maintain an indicated airspeed within plus or minus 10 knots of the assigned airspeed. Holding
airspeed, enroute descent airspeed, and approach airspeed changes do not require reports.
Pilots are required to report to the ATC controlling agency any in-flight malfunctions of
navigation or communication equipment, such as loss of VOR or TACAN or impairment of
communications capability. The report shall include aircraft's ID, equipment affected, the degree
to which the pilot's capability to operate IFR is impaired, and the nature and extent of assistance
desired from the controlling agency.
Pilots encountering unusual or unforecasted weather, weather on an IFR approach differing from
the latest observation, or weather below landing minimums which caused the pilot to execute a
missed approach are required to make a Pilot Weather Report or PIREP. The PIREP format is
contained in the Flight Information Handbook.
809. SUMMARY OF IMPORTANT IFR VOICE REPORTS
OFF REPORT "-------- OFF (AIRPORT) CLIMBING TO (ALTITUDE), OVER."
INITIAL CONTACT REPORT WITH CENTERS/SECTOR CONTROLLERS (NONRADAR)
AT A FIX "-------- (POSITION), OVER."
AT A TIME OR ALTITUDE "--------ESTIMATING (POSITION), (TIME),
INITIAL CONTACT REPORT WITH CENTERS/SECTOR CONTROLLERS (RADAR)
COURTESY CALL "--------(POSITION), OVER."
P T A P T P "--------(POSITION), (TIME), (ALTITUDE), (POSITION), (TIME),
INTRODUCTION TO GROUND, AIRBORNE, LOST COMMUNICATION, AND
EMERGENCY VOICE PROCEDURES 8-31