For little over a year now, US airframer Boeing, has been offering a ‘Performance Improvement Package’ (PIP) on its best selling 737NG aircraft. This includes the 737-800, 737-700 and 737-900ER, operated, in India, by the Jet Airways group and SpiceJet. PIP combines aerodynamic and engine performance improvements to reduce fuel burn by up to 2%. Boeing began performance improvement testing …

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