Isolation valve The isolation valve separates the left, from the right side of the bleed manifold. It is powered from AC Transfer Bus 1 b...

Window Heating Window heat is provided to improve impact resistance (bird hit), ice buildup and defogging and should be selected ON ...

Engine Electronic Control (EEC) The EEC is mounted on the right top side of the fan duct and exists of two computers (channel 1 & 2...

Air Cycle Machine Operation The two air condition packs provide “conditioned” air (temp and moisture) to the air condition system. They a...

1.       Flight Crew Oxygen Ever wondered why you have to hold the RESET/TEST switch down and push the EMERGENCY/Test selector for...

  EEC Idle Modes Of Operation The engines idle modes are determined though inputs to the EEC which calculates the required fuel flow s...

Thrust Reverser Each engine is equipped with a thrust reverser system that reduces stopping distance and brake disc wear. The T/R’s ...

Nitrogen Generating System Following two Boeing 737CL explosion investigations in Asia (and others including the B747 TWA 800 mida...

ATA 36 (PNEUMATIC) Engine Loss And Possible Effect On Pneumatic System The QRH provides information towards the safe handling of ...

ATA 21 (AIR CONDITIONING) Cabin Altimeter I determined I’ve looked at the indication from an opposite, less operational (real life)...