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  • Chapter 4. Air Traffic Control › Section 3. Airport Operations › 4-3-17. VFR Helicopter Operations at Controlled Airports

    expected that pilots will advise ATC if a specific clearance will cause undue hazards to persons or property. b. Controllers normally limit ATC ground service and instruction to movement areas; therefore, operations from nonmovement areas are conducted at pilot discretion ... must be recognized by the pilot, and action should be taken as necessary to avoid such hazards. Taxi, hover taxi, and air taxi operations are considered to be ground movements. Helicopters conducting such operations are expected to adhere…

  • Pilot/Controller Glossary › A

    RESPONSIBLE TO REQUEST AN AMENDED CLEARANCE if ATC issues a clearance that would cause a pilot to deviate from a rule or regulation, or in the pilot’s opinion, would place the aircraft in jeopardy. (See ATC INSTRUCTIONS.) (See ICAO ... term AIR TRAFFIC CONTROL CLEARANCE.) AIR TRAFFIC CONTROL- A service operated by appropriate authority to promote the safe, orderly and expeditious flow of air traffic. (See ICAO term AIR TRAFFIC CONTROL SERVICE.) AIR TRAFFIC CONTROL CLEARANCE [ICAO]- Authorization…

  • Chapter 4. Air Traffic Control › Section 3. Airport Operations › 4-3-18. Taxiing

    Taxiing a. General. Approval must be obtained prior to moving an aircraft or vehicle onto the movement area during the hours an Airport Traffic Control Tower is in operation. 1. Always state your position on the airport when calling ... tower for taxi instructions. 2. The movement area is normally described in local bulletins issued by the airport manager or control tower. These bulletins may be found in FSSs, fixed base operators offices, air carrier offices, and operations offices…

  • Chapter 12: Weather Theory › Air Masses

    Areas of stagnation can be found in polar regions, tropical oceans, and dry deserts. Air masses are generally identified as polar or tropical based on temperature characteristics and maritime or continental based on moisture content. A continental polar air mass ... forms over a polar region and brings cool, dry air with it. Maritime tropical air masses form over warm tropical waters like the Caribbean Sea and bring warm, moist air. As the air mass moves from its source region…

  • 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 16: Cabin Environmental Control Systems › Air Cycle Air Conditioning › System Operation

    Air Cycle Air Conditioning Air cycle air conditioning prepares engine bleed air to pressurize the aircraft cabin. The temperature and quantity of the air must be controlled to maintain a comfortable cabin environment at all altitudes and on the ground ... air cycle system is often called the air conditioning package or pack. It is usually located in the lower half of the fuselage or in the tail section of turbine-powered aircraft. [Figure 16-62] System Operation Even with…