747-400 ENGINE BLEED AIR SYSTEM QUESTIONS AND ANSWERS
2 views 0 purchase
Course
747-400 ENGINE BLEED AIR SYSTEM
Institution
747-400 ENGINE BLEED AIR SYSTEM
747-400 ENGINE BLEED AIR SYSTEM
290. Under what conditions would High Pressure (HP) air would be used? - Answer- Descent
Other low power setting operations
FCOM, VOL 2. 2.40.1
291. Under what conditions would Intermediate Pressure (IP) air be used? - Answer- High power setting operations....
747-400 ENGINE BLEED AIR SYSTEM
290. Under what conditions would High Pressure (HP) air would be used? - Answer-
Descent
Other low power setting operations
FCOM, VOL 2. 2.40.1
291. Under what conditions would Intermediate Pressure (IP) air be used? - Answer-
High power setting operations.
FCOM, VOL 2; 2.40.1
292. The Engine Bleed Air Switches control which valves by system logic, when
bleed air pressure is available? - Answer- Engine bleed air valve
PRV
HP bleed valve
FCOM, VOL 2; 2.10.31
293. Describe the general function of pressure regulating valve (PRV). - Answer-
Prevents damage to ducting and equipment downstream, the PRV limits bleed air
pressure.
FCOM, VOL 2; 2.40.2
294. How are the engine bleed air valves actuated, and when do they open for
forward flow? - Answer- The bleed air valves are pressure actuated.
They remain closed until engine bleed air pressure causes forward flow.
FCOM, VOL 2; 2.40.1
295. With the HP valve failed open and the respective bleed air switch OFF, will
nacelle anti‐ice be available? - Answer- No
FCOM, VOL 2; 2.40.2
296. An Engine Bleed Air System (SYS) FAULT light indicates what? - Answer-
Bleed air overheat
Bleed air overpressure
HP bleed valve open when commanded closed
PRV open when commanded closed
FCOM, VOL 2; 2.10.31
297. What does a bleed duct Isolation (ISLN) VALVE light indicate (amber)? -
Answer- Isolation valve position disagrees with switch position
FCOM, VOL 2; 2.10.31
298. What prevents reverse air flow into the engine compressor sections during
engine start? - Answer- The PRV is positively closed
FCOM, VOL 2; 2.40.1
299. What happens if the engine start valve fails to close? - Answer- Bleed air is
isolated from the engine starter
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Freshy. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.49. You're not tied to anything after your purchase.
