Publication date: 10 DEC 2015

AIC A 07/2015

SINGLE ENGINE TAXI OPERATIONS AT HAMAD INTERNATIONAL AIRPORT

1 INTRODUCTION

1.1 Aircraft maneuvers on the surface contribute significantly to the fuel burn and emissions at airports. In this context, substantial quantities of environmental contamination such as emissions of Carbon Dioxide, Hydrocarbons, Nitrogen Oxides, Sulfur Oxides and Particulate Matter (PM) dispose to the air due to delays, throttle settings and the number of engines that are powered-on during taxi times
1.2 Accordingly, aircraft operators are encouraged to perform Single Engine Taxi Operations at Hamad International Airport to protect the local environment as well as it benefits to operators with considerable fuel savings.

2 SINGLE ENGINE TAXI OPERATIONS

2.1 Fuel burn and emissions can potentially be reduced when aircraft were to taxi, using only a subset of their engines. This translates to use one engine for twin-engine aircraft, and is therefore referred to as “Single engine taxi operations”.

3 GUIDELINES

3.1 Single engine taxi operations may be applied by multi-engine aircraft when the following conditions are met;
  1. Shutting down an engine during taxi-in operations shall be planned and accomplished as early as possible during the taxi phase.
  2. During taxi-out, if not all engines are operated, it has to be assured that no delay occurs at the holding point for engine warm-up.
  3. The technique may be applied by the pilot without prior approval from ATC.
  4. The pilot shall comply with the ATC at any time during the single engine taxi operations.
3.2 Single engine taxi operations shall not be performed when;
  1. The aircraft is on the runway.
  2. During low visibility conditions CAT II or below.
  3. The wind speed is more than 25 KT and/or gust of more than 10 KT
  4. Taxiing or parking involves with a turn of 180 degrees or more.
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