Hydraulics

Non-Normal

Normal

Non-Normal

HYD ACCUM P (LOW)

HYD PRESS (LOW)

HYD RSVR QTY (LOW)

HYD RSVR T

W/B QTY (LOW) 

Normal

HYD PRESS (LOW)   GNC 51 OVERRIDE BFS, SM SYS SUMM 2

⇒1 √APU SPEED SEL (three) – NORM

If not AOA:

2   √Auto SHTDN (three) – ENA

Go to APU SHUTDN

If  AOA: ED SEL (three) – NORM

  3. Compare ‘PRL SYS X’ status and aff HYD PRESS ( HYD/APU meter and CRT):

4. If APU Running: (Aff) HYD MN PUMP PRESS – LO

If two good APU/HYD remain:

5. √Auto SHTDN (three) – ENA

At q = 1:

6. HYD MN PUMP PRESS (two) – NORM

At TAEM:

7. APU SPEED SEL (two) – HI >>

If only one good APU/HYD remains:

8. √APU Auto SHTDN (one) – INH

     HYD MN PUMP PRESS (one) – LO

At q = 1:

9.   HYD MN PUMP PRESS (one) – NORM

      APU SPEED SEL (one) – HI

On MCC call:

10. (Degraded) HYD MN PUMP PRESS – NORM

 

 

HYD RSVR QTY (LOW)                    BFS, SM SYS SUMM 2

⇒1  (Aff) HYD MPS/TVC ISOL VLV SYS – CL (hold 5 sec, tb-CL)

√BK ISOL VLV – CL (hold 5 sec, tb-CL)

If HYD sys 1 leaking:

√LG EXTD ISOL VLV – CL (hold 5 sec, tb-CL)

If qty still decr:

2.           If  AOA:

   (Aff) HYD MN PUMP PRESS – LO

 If qty decr within 3 min:

Go to APU SHUTDN >>

 If  not  AOA:

Go to APU SHUTDN

HYD RSVR T                            BFS, SM SYS SUMM 2

1.  BLR CNTLR/HTR  – B (A)

If HYD RSVR T > 250:

2.   HYD MN PUMP PRESS – LO

If HYD RSVR T > 268 and incr:

3.  Perform APU SHUTDN

If  AOA:

At M = 7:

4.  Go to APU COOLDOWN (A/E SYS, PLT WND FB, APU HYD)

HYD ACCUM P (LOW)                  BFS, SM SYS SUMM 2

HYD CIRC PUMP – ON

W/B QTY (LOW)                    BFS, SM SYS SUMM 2

⇒1.  BLR CNTRL/HTR – B

   2. √N2 SPLY – ON

If W/B QTY = 0 >>

Monitor W/B QTY for 2 min, then:

If W/B QTY change > 3:

3. Go to APU SHUTDN