Podcast
Questions and Answers
When does the HMCA close the FSOV during engine shutdown if the UERF logic is armed?
When does the HMCA close the FSOV during engine shutdown if the UERF logic is armed?
- On the first engine as the logic monitors EDP low-pressure conditions. (correct)
- After a five-minute delay to allow for system stabilization.
- On the last engine after the logic monitors EDP high-pressure conditions.
- After the second engine reaches low-pressure conditions.
An inadvertent push of the T.O CONFIG pb during phases 3 to 11 will trigger what message?
An inadvertent push of the T.O CONFIG pb during phases 3 to 11 will trigger what message?
- DM HYD ENG 1(2) G PMP on ground, at next engine start. (correct)
- FUEL IMBALANCE caution message on the EWD.
- ENG OIL LEVEL LOW warning on the ECAM.
- APU GEN FAULT advisory on the electrical SD page.
What is the correct indication regarding the HYD G(Y) SYS PRESS LO alert after landing gear extension?
What is the correct indication regarding the HYD G(Y) SYS PRESS LO alert after landing gear extension?
- It indicates a severe hydraulic leak and requires immediate landing.
- It is correct on the WHEEL SD page; disregard any NORM indication.
- It is correct on the WD and PART NORM BRK, correctly displayed in the INOP SYS section of the SD STATUS page. (correct)
- It should always be considered a false alarm.
Under what circumstances is the HMCA UERF protection logic active and able to close the FSOV of EDP?
Under what circumstances is the HMCA UERF protection logic active and able to close the FSOV of EDP?
What indication might be present on the WHEEL SD page after landing gear extension when the HYD G(Y) SYS PRESS LO alert is triggered?
What indication might be present on the WHEEL SD page after landing gear extension when the HYD G(Y) SYS PRESS LO alert is triggered?
Which hydraulic system is the behavior of the HMCA UERF protection logic applicable to?
Which hydraulic system is the behavior of the HMCA UERF protection logic applicable to?
What is the consequence of an inadvertent push of the T.O CONFIG pb during flight regarding cockpit indications?
What is the consequence of an inadvertent push of the T.O CONFIG pb during flight regarding cockpit indications?
What is a direct consequence of HMCA UERF protection logic?
What is a direct consequence of HMCA UERF protection logic?
When the T.O CONFIG pb is inadvertently pushed in flight, what eventual warning might the flight crew see at engine shutdown?
When the T.O CONFIG pb is inadvertently pushed in flight, what eventual warning might the flight crew see at engine shutdown?
What operational recommendation is provided if the HYD G(Y) SYS PRESS LO alert is triggered after landing gear extension?
What operational recommendation is provided if the HYD G(Y) SYS PRESS LO alert is triggered after landing gear extension?
What warning or alert is suppressed when pressing the T.O CONFIG pb-sw in flight resets to flight phase 2?
What warning or alert is suppressed when pressing the T.O CONFIG pb-sw in flight resets to flight phase 2?
In the event of an inadvertent push of the T.O CONFIG pb during flight, how does this affect maintenance personnel?
In the event of an inadvertent push of the T.O CONFIG pb during flight, how does this affect maintenance personnel?
If the T.O CONFIG pb is inadvertently pushed in flight, what indication will be displayed on the HYD SD page at engine shutdown?
If the T.O CONFIG pb is inadvertently pushed in flight, what indication will be displayed on the HYD SD page at engine shutdown?
For which flight phases is an inadvertent push of the T.O CONFIG pb relevant regarding the triggering of the DM HYD ENG PMP message?
For which flight phases is an inadvertent push of the T.O CONFIG pb relevant regarding the triggering of the DM HYD ENG PMP message?
What action does the HMCA perform upon detecting an Uncontained Engine Rotor Failure (UERF)?
What action does the HMCA perform upon detecting an Uncontained Engine Rotor Failure (UERF)?
When should the NORM indication on the WHEEL SD page be disregarded?
When should the NORM indication on the WHEEL SD page be disregarded?
What is the status of the HMCA UERF logic during ground operation?
What is the status of the HMCA UERF logic during ground operation?
If the HYD G(Y) SYS PRESS LO alert is triggered after landing gear extension, what does the WD indicate?
If the HYD G(Y) SYS PRESS LO alert is triggered after landing gear extension, what does the WD indicate?
What is the primary effect of the HMCA monitoring EDP low-pressure conditions during engine shutdown?
What is the primary effect of the HMCA monitoring EDP low-pressure conditions during engine shutdown?
Flashcards
HYD G(Y) SYS PRESS LO Alert
HYD G(Y) SYS PRESS LO Alert
After landing gear extension, HYD G(Y) SYS PRESS LO alert triggers. On the WHEEL SD page, NORM indication may be displayed, but the alert is correct on the WD.
Operational Recommendation for HYD G(Y) SYS PRESS LO
Operational Recommendation for HYD G(Y) SYS PRESS LO
When the HYD G(Y) SYS PRESS LO alert is triggered after landing gear extension, disregard the NORM indication on the WHEEL SD page.
DM HYD ENG PMP Trigger
DM HYD ENG PMP Trigger
An inadvertent push of the T.O CONFIG pb during flight (Phases 3-11) triggers DM HYD ENG 1(2) G PMP on ground, at the next engine start.
Cockpit Effects of Inadvertent T.O CONFIG pb Push
Cockpit Effects of Inadvertent T.O CONFIG pb Push
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Root Cause: HMCA UERF and T.O CONFIG pb
Root Cause: HMCA UERF and T.O CONFIG pb
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Study Notes
HYD G(Y) SYS PRESS LO Alert
- When the HYD G(Y) SYS PRESS LO alert triggers after landing gear extension, the WHEEL SD page may display NORM instead of NORM.
- However, the HYD G(Y) SYS PRESS LO alert is correct on the WD, and PART NORM BRK is correctly displayed in the INOP SYS section of the SD STATUS page.
Operational Recommendations
- If the HYD G(Y) SYS PRESS LO alert triggers after landing gear extension, disregard the NORM indication on the WHEEL SD page.
DM HYD ENG PMP Triggered at Engine Start
- Triggered due to inadvertent push of T.O CONFIG PB in previous flight
Description
- Applicable to ALL 350-1041
- An inadvertent push of the T.O CONFIG pb during flight (Phases 3 to 11, from Takeoff to Taxi in) will trigger DM HYD ENG 1(2) G PMP on the ground at the next engine start.
Cockpit Effects
- When the T.O CONFIG pb is inadvertently pushed in flight:
- There is no immediate cockpit effect.
- There are no Dispatch Messages or alerts at engine shutdown to warn the flight crew or maintenance personnel.
- The ISOL pb will illuminate in the overhead panel at engine shutdown.
- The FSOV amber closed will be displayed on the HYD SD page at engine shutdown.
Root Cause
- HMCA UERF (Uncontained Engine Rotor Failure) protection logic closes the FSOV of EDP in the case of a detected UERF.
- The logic is active only in flight, and pressing the T.O CONFIG pb-sw in flight resets flight phase 2, preventing inhibition of that logic for ground operation.
- During engine shutdown, if the UERF logic is armed, the HMCA will close the FSOV on the first engine as the logic monitors EDP low-pressure conditions.
- The behavior is applicable only in the Green hydraulic system.
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