CFM56-5a/b1
 

Sharing experience tips on the above engines

Wonderful little GE80 minimotahs. Have someone demonstrate opening the cowls. It may be the one time you get to do it. :cool:

Have plenty of oil on hand. Our A340-300`s equiped with the cfm type c engines are limited by oil consumtion not fuel!:eek:

Our cfm56-5b always leak fuel at starting in winter.After operating a few minutes and increase thrust it will be well.Does cfm can't deal with this problem?
Second,when install IDG it is hard when install the IDG's shaft in gearbox.Does anybody has good idea to settle these ?

Try to set the next shift up to do the job, like we have tried today, but I expect It'll still be there for us tommorrow.

Edrian,
I remember having difficultly installing an idg once myself. If I recall correctly, we rotated accessory gearbox at drivepad and idg splines engaged nicely afterwards.
What i'd like to know is how many connect a cart and pump open the thrust reverser vs. manhandling it open??
I've seen both:E

In the past on the V2500 IDG change I have opened the Thrust Reverser half and have removed the crank pad to turn the gearbox/engine and also remove the unions from the IDG before trying to lower or fit it.

On the CFM56-5b installed on the airbus a320/321, it is common for the engine to leak fuel on start up...particularily if it is a very cold morning and its the first flight of the day. CFMI are aware of this and advise waiting a period of 5 minutes for the fuel leak to stop. This leak can indeed be quite a steady flow of fuel coming from the bottom of the engine. If the leak has not stop within the time advised, the aircraft must return to stand for investigation.
The Reason for this leak is that when it is very cold (i.e. on a very cold night...doing first flight the next morning), the seals in the HMU are not adequately warmed...hence the leakage of fuel...but soon after, i.e. using the fuel as "muscle pressure" as the HMU does, the seals return as intended..

According to CFMI advise when engine fuel leaking we aiways let the engine run a few minutes,but in the follow 5 minutes the fuel did'nt stop leaking.then we let the engine taxi to parking and then restart,at this time the fuel leakage always disappear.Sometimes I think ,whether a restart engine can settle the fuel leakage?