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Process Of Changing A Jet Engine  
User currently offlineSharpnfuzzy From Canada, joined Jun 2001, 570 posts, RR: 0
Posted (12 years 11 months 3 weeks 1 day 7 hours ago) and read 3073 times:

Hi, does anyone know where I can find online resources about the process of changing or replacing an engine on a commercial jet?... things like 'Process Reports' would be great!

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User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3701 posts, RR: 34
Reply 1, posted (12 years 11 months 3 weeks 21 hours ago) and read 3009 times:
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Basically it's as follows :-

1. Pull the Circuit Breakers (CB's) for the Fire Extingushers and Ignitors

2. Pull the fire handle (to isolate the engine from the fuel & hydraulic systems)

3. Pull the CB's for ralated engine electrics (instruments, Generators, pneumatics etc)

4. Open/Remove cowlings.

5. Disconnect:
a) Hydraulics lines (Supply, Pressure & Case drain)
b) Fuel Line
c) Pneumatic Duct & Nacelle anti-ice
d) Electrical Cables (Gen feeder, instumentation connectors etc)
e) Engine Controls

6. Fit hoist gear to pylon

7. Fit Engine stand adaptors to engine

8. Winch engine stand to engine and tension winch to take the weight, this is indicated by load scales fitted to the winches

9. Release engine mount bolts/nuts, depending on installation (one or two at front of engine, 4 at the back)

10. Winch engine to ground and push out of the way

11. Carry out inspection of pylon lower surface (looking cracked firewall, wear in the engine mount structure, check electrical connector pins for wear/burning.

12. Wheel new engine into postion & winch up ad pre-load engines against engine mounts (or, depending on engine type, bring engine to within 1/4 inch of mount faces and fit bolts and pull engine up to mount faces) fit mount bolts/nuts and torque load to around 350 Lbs ft (actual figure depending on a/c type)

13. Reconnect every thing you disconnected

14. Rig engine controls

15. Reset CB's

16. Reset Fire Handle

17. Carry out ignitor function check

18. Pressurise fuel/hydraulic/pneumatic lines and check for leaks

19. Carry out a wet motoring cycle (Turn engine over on starter motor and add fuel but no ignition) and check for leaks

20. Close/fit cowlings

21. Take a/c down to run pen and give the new engine a sound thrashing, check the engine systems ( generator, thrust reverser/anti-ice/fuel heat etc) and adjust the trim as necessary. On a FADEC engine you may just need to do an idle run if the engine has been test cell run.


I hope that answers your question.

To the experts, the above is a generalistion and not supposed to be type specific.


User currently offlineA/c train From United Kingdom, joined Jun 2001, 501 posts, RR: 4
Reply 2, posted (12 years 11 months 3 weeks 12 hours ago) and read 2973 times:

Very impressive VC-10,
regards
a/c


User currently offlineSharpnfuzzy From Canada, joined Jun 2001, 570 posts, RR: 0
Reply 3, posted (12 years 11 months 3 weeks 11 hours ago) and read 2962 times:

Yeah, impressive indeed, thanks a lot

User currently offlineDC-10Tech From United States of America, joined Jun 2001, 298 posts, RR: 2
Reply 4, posted (12 years 11 months 2 weeks 6 days 11 hours ago) and read 2941 times:

And here's what it looks like:

Engine Change



Forums.AMTCentral.com
User currently offlineAirlinelover From United States of America, joined Jun 2001, 5580 posts, RR: 23
Reply 5, posted (12 years 11 months 2 weeks 3 days 4 hours ago) and read 2879 times:

It looks like just the innards of the engine, and not the outer casing, are being removed.. Is this true?

Chris



Lets do some sexy math. We add you, subtract your clothes, divide your legs and multiply
User currently offline242 From United States of America, joined Oct 2000, 498 posts, RR: 1
Reply 6, posted (12 years 11 months 2 weeks 3 days 2 hours ago) and read 2860 times:

The entire engine is being removed in that photo. The "outer casing" is actually the fan, reverser and core cowls still attached. Depending on the aircraft, (some require the fan and core cowl removal) this is standard procedure.

User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3701 posts, RR: 34
Reply 7, posted (12 years 11 months 2 weeks 2 days 23 hours ago) and read 2852 times:
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