Understanding Airplane Turbofan Engine Operation Helps Flight Crews Respond to Malfunctions

Maintaining aircraft control, diagnosing correctly the engine malfunction and taking appropriate action are the keys to continued safe flight.

The Migration To Higher Thrust Engines And The Effect On Control Speeds

For the B777 airplane the growth in engine thrust levels has increased since the original PW4074 engine. This original engine was rated at 74000 pounds of thrust and was envisioned to grow to around 95000 pounds of thrust.

Preventing Engine Ingestion Injuries

History has shown that failure to observe proper safety precautions, such as good communication and awareness of the hazard areas in the vicinity of an operating jet engine, can result in serious injury or death. The risk of ingestion can be prevented with appropriate training and adherence to the safety precautions

Jet Engines Basics

Jet Engines basics developped and published by Boeing. A very well illustratated document!

Inflight Airplane Vibration

Modern commercial jet airplanes provide smooth, comfortable travel that typically is free of vibration. Some types of vibration can be expected from time to time and are considered normal. However, isolated cases of abnormal vibration require prompt flight crew response and subsequent timely maintenance action.

Ice Crystal Weather Threat To Engines
Handling Engine Malfunctions

The objective of this Briefing is to provide basic guidelines to identify engine malfunctions and to give typical operational recommendations in case of engine malfunctions.

Fuel Filter Contamination

Dirty fuel is the main cause of engine fuel filter contamination. Although’s a difficult problem to isolate, airlines can take steps to deal with it, including auditing fuel suppliers to ensure that they are following applicable fuel handling requirements and replacing engine fuel filters more often.

Engines Thrust Loss

Review of operational impact

Engine Regulation by CFM
Engine Power Loss In Ice Crystal Conditions

High-altitude ice crystals in convective weather are now recognized as a cause of engine damage and engine power loss that affects multiple models of commercial airplanes and engines. These events typically have occurred in conditions that appear benign to pilots, including an absence of airframe icing and only light turbulence.

Engine Performance Deterioration by CFM
Engine Operation and Malfunctions

The purpose of this document is to provide straightforward material to give flight crews the basics of airplane engine operational theory. This document will also provide pertinent information about malfunctions that may be encountered during the operation of turbofanpowered airplanes, especially those malfunctions that cannot be simulated well and may thus cause confusion.

Engine Ignition Selection

This document has been published by Airbus and deals with Engine Ignition Selection.

Economic Impact of Derated Climb on Large Commercial Engines

Aircraft engines are sized and power managed to meet takeoff field length and climb rate requirements at the maximum takeoff gross weight (TOGW). When operating at reduced TOGW, reduced thrust (derate) may be used in both takeoff and climb to extend engine life and reduce maintenance cost.

Derate Takeoff by CFM
CFM Flight Ops Support B737
CFM Flight Ops Support A320