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B737-300 Fuel Burn

 
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K.Haroon
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Joined: 11 Dec 2005
Posts: 1306

PostPosted: Thu Feb 07, 2008 5:25 am    Post subject: B737-300 Fuel Burn Reply with quote

The flight plan fuel burn from departure to destination is based on certain assumed conditions. These include:

- Takeoff gross weight

- Cruise altitude

- Route of flight

- Temperature

- Enroute winds

- Cruise speed

Actual fuel burn should be compared to the flight plan fuel burn throughout the flight. The planned fuel burn can increase due to the following reasons:

- Temperature above planned

- A lower cruise altitude than planned

- Cruise altitude more than 2000 feet above optimum altitude

- Speed faster than planned or appreciably slower than long cruise range speed when long range cruise was planned

- Stronger headwind component

- Fuel imbalance

- Improperly trimmed airplane

- Excessive thrust lever adjustment

If a discrepancy is discovered between actual fuel burn and flight plan fuel burn that cannot be explained by one of the items above a fuel leak should be considered. Accomplish the applicable non-normal checklist.
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