IP.III.B.R1
Risk managementRecalculating fuel reserves if assigned an unanticipated expect further clearance (EFC) time.
From the FAA library
- Chapter 5. Air Traffic Procedures › Section 2. Departure Procedures › 5-2-7. Departure Restrictions, Clearance Void Times, Hold for Release, and Release Times
Departure Restrictions, Clearance Void Times, Hold for Release, and Release Times a. ATC may assign departure restrictions, clearance void times, hold for release, and release times, when necessary, to separate departures from other traffic or to restrict or regulate ... from an airport without an operating control tower must be issued either a departure release (along with a release time and/or void time if applicable), or a hold for release. 1. Clearance Void Times. A pilot may receive a clearance…
- Pilot/Controller Glossary › C
CLEARANCE LIMIT- The fix, point, or location to which an aircraft is cleared when issued an air traffic clearance. (See ICAO term CLEARANCE LIMIT.) CLEARANCE LIMIT [ICAO]- The point to which an aircraft is granted an air traffic control clearance ... CLEARANCE VOID IF NOT OFF BY (TIME)- Used by ATC to advise an aircraft that the departure release is automatically canceled if takeoff is not made prior to a specified time. The expiration of a clearance void time does…
- Chapter 5. Air Traffic Procedures › Section 2. Departure Procedures › 5-2-1. Pre-taxi Clearance Procedures
Section 2. Departure Procedures 5-2-1. Pre-taxi Clearance Procedures a. Certain airports have established pre-taxi clearance programs whereby pilots of departing instrument flight rules (IFR) aircraft may elect to receive their IFR clearances before they start taxiing ... takeoff. The following provisions are included in such procedures: 1. Pilot participation is not mandatory. 2. Participating pilots call clearance delivery or ground control not more than 10 minutes before proposed taxi time. 3. IFR clearance (or delay information…
- Chapter 2: En Route Operations › ATC Holding Instructions
event that two-way radio communication is lost, the EFC allows the pilot to depart the holding fix at a definite time. Pilots should plan the last lap of the holding pattern to leave the fix as close as possible ... exact time. [Figure 2-71] When approaching the clearance limit and you have not received holding instructions from ATC, pilots are expected to follow certain procedures. First, call ATC and request further clearance before reaching the fix. If further clearance…
- Chapter 2: Engine Fuel & Fuel Metering Systems › Fuel Metering Devices for Reciprocating Engines › Air-Fuel Mixtures
Internal cylinder cooling is obtained from unused fuel when air-fuel ratios above 0.067 are used. The same function is performed by excess air when air-fuel ratios below 0.067 are used. Varying the mixture strength of the charge produces ... changes in the engine operating condition affecting power, temperature, and spark-timing requirements. The best power air-fuel ratio is desirable when the greatest power from a given airflow is required. The best economy mixture results from obtaining the given…