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Copyright . The Boeing Company. See title page for details.
L.TOC.0.2 D6-30151-425 October 1, 2000
747 Operations Manual
General
This chapter contains Airplane Flight Manual (AFM) limitations and Boeing recommended non-AFM operating limitations. Boeing recommended limitations are provided for flight crew information. Limitations that are obvious, shown on displays or placards, or incorporated within an operating procedure are not contained in this chapter.
Airplane General Operational Limitations
Runway slope +/-2%
Maximum Takeoff and Landing Tailwind Component 15 knots
Maximum Operating Altitude 45,100 feet pressure altitude
Maximum Takeoff and Landing Altitude 10,000 feet pressure altitude
Maximum speed operating in Reduced Vertical Separation Minimum (RVSM) Airspace 0.90 Mach
QFE Operations Prohibited
Non–AFM Operational Information
The turbulent air penetration speed is 290 to 310 KIAS/.82 to .85M. The maximum takeoff and landing crosswind is 30 knots (not limiting). Do not operate HF radios or weather radar during refueling operations.
Altitude Display Limits for RVSM Operations
Standby altimeters do not meet altimeter accuracy requirements of RVSM airspace.
The maximum allowable in-flight difference between Captain and First Officer altitude displays for RVSM operations is 200 feet.
Copyright . The Boeing Company. See title page for details.
April 01, 2001 D6-30151-425 L.10.1
Limitations -Operating Limitations 747 Operations Manual
The maximum allowable on-the-ground altitude display differences for RVSM operations are:
Field Elevation Max Difference Between Captain & F/O Max Difference Between Captain or F/O & Field Elevation
Sea Level to 5,000 feet 35 feet 75 feet
10,000 feet 40 feet 75 feet
Weight Limitations
Weights Kilograms
Maximum Taxi Weight 397,800
Maximum Takeoff Weight 396,893
Maximum Landing Weight 285,763
Maximum Zero Fuel Weight 246,073
Door Mounted Power Assists and Escape Slides
Main and upper deck door emergency power assists and evacuation slide systems must be armed with the mode select lever in the AUTOMATIC position prior to taxi, takeoff, and landing whenever passengers are carried in the respective area.
Air Systems Cabin Pressurization
Maximum differential pressure (relief valves) 9.4 psi
Maximum allowable cabin pressure differential for takeoff and landing 0.11 psi
Autoflight Autopilot/Flight Director System
The autopilot must not be engaged below a minimum engage altitude of 250 feet after takeoff.
The autopilot must be disengaged before the airplane descends more than 50 feet below the MDA unless it is coupled to an ILS glideslope and localizer or in the go–around mode.
Copyright . The Boeing Company. See title page for details.
L.10.2 D6-30151-425 October 1, 2000
Limitations -Operating Limitations
747 Operations Manual
For single channel ILS approaches, the autopilot must be disengaged before the airplane descends below 100 feet AGL.
Use of aileron trim with the autopilot engaged is prohibited.
Automatic Landing
Maximum allowable wind speeds when landing weather minima are predicated on autoland operations:
Headwind 25 knots
Tailwind 15 knots
Crosswind 25 knots
The maximum glideslope angle is 3.25 degrees.
The minimum glideslope angle is 2.5 degrees.
Automatic landings may be made with flaps 25 or 30 only.
Communications VHF Radios
With an operational ACARS system, the use of center VHF radio is not approved for ATC voice communications.
Engines, APU Engine Limit Display Markings
Maximum and minimum limits are red. Caution limits are amber.
Engine Fuel System
The maximum fuel temperature for Jet A, Jet A–1, JP–5, or JP-8 is 54°C (130°F). The use of Jet B and JP-4 fuels is prohibited.
Engine Ignition
Continuous ignition must be on encountering:
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heavy rain
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severe turbulence
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volcanic ash
.
icing conditions
.
standing water or slush on runway Note: Continuous ignition is automatically provided when nacelle anti–ice is on.
Copyright . The Boeing Company. See title page for details.
April 01, 2001 D6-30151-425 L.10.3
Limitations -Operating Limitations
Reverse Thrust
Intentional selection of reverse thrust in flight is prohibited. Backing the airplane with use of reverse thrust is prohibited.
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