HOT SECTION INSPECTION WHICH PARTS ARE INVOLVED?A hot section inspection (HSI) involves examining the condition of the turbine blades, the combustion chamber, the stators, the vane rings, the compressor turbine disk and the shroud segments WHEN SHOULD YOU DO IT?required when the engine reaches the halfway point of its time between overhauls If the 4,000 […]
April 2021
Electric Engine Start
Main engine start is usually from the APU auxiliary starter generators (ASG).The ASGs supply 235v ac. If the ASGs are not available, 115v ac externalpower sources supply the power. The power goes to the autotransformer rectifier units (ATRU) on the P700/800 rack. The ATRUs supply 270v dc to common motor start controllers (CMSC) also on […]
How does a Fuel Jettison system take effect ? Why do narrow body aircrafts lag a Jettision system ?
✔ A Fuel jettison system is available to avoid safety compromise and the necessity for heavy maintenance tasks, that could arise due to a potential overweight landing. ✔ Against a popular rumour, in regular flight operations, there is no draining of fuel before landing. This would be neither permissible nor economical for the airlines. ✔ […]
Formation And Ingestion Of Vortices Into Jet Engines During Operation
The votices are formed at the inlet of a jet engine or the fan. This happens because, as the engine sucks in the air, a region of low pressure is created in front of the fan. If there is water vapour present in the atmosphere or in the region of low pressure, they condenses to […]
Why are jet engines so expensive? How many years does a jet engine last?
Jet engines are so expensive, because they are getting more and more sophisticated and fuel efficient. Some engines are reliability wonders, have logged between 30 000 hours up to 50 000 hours time on wing without having to visit the engine workshop.(CFM56) They are so reliable, it is very difficult to shut them down, as […]
LANDING GEAR SYSTEM
Landing Gear system is one of the critical subsystems of an aircraft and is often configured along with the aircraft structure because of its substantial influence on the aircraft structural configuration itself. The purpose of the landing gear in an aircraft is to provide a suspension system during taxi, take-off and landing. It is designed […]
Why cockpit doors locked?
A prosecutor in Marseille has said the Germanwings plane may have been deliberately crashed by the co-pilot, with the pilot locked out of the cockpit. How could this situation arise? After 9/11, changes were made to the security of cockpits in an effort to make hijackings more difficult. According to the US Federal Aviation Administration, […]
UTair ATR 72 Collides With Small Plane At Surgut Airport
Incident / UTair Aviation ATR-72 (VQ-BLJ), while undergoing engine runs during a maintenance inspection, rolled forward until it collided with a stored SKOL Yak-40 (RA-87340) at Surgut Airport (USRR), Russia. No injuries reported. According to Ria.ru, the incident occurred on the evening of April 1st at Surgut Airport. The UTair ATR 72 was undergoing maintenance at the airport […]
What is a PDA or TOFA ? What is the safety implication ? Who is responsible to limit their occurrences ?
What is a PDA or TOFA ? What is the safety implication ? Who is responsible to limit their occurrences ? ✈A PDA (Parts Departing from Aircraft), also called TFOA ( Things Falling-Off Aircraft ) is any piece of equipment falling from an aircraft, ranging in size from a simple rivet up to a fan […]
What is SLOP?
Strategic Lateral Offset Procedures (SLOP)SLOP are approved procedures that allow aircraft to fly on a parallel track to the right of the center line relative to the direction of flight. An aircraft’s use of these procedures does not affect the application of prescribed separation standards. SLOP allows pilots to fly either the centreline, 1NM or […]