APU

Non-Normal

Normal

Non-Normal

APU SPD HI

APU OVERSPEED/UNDERSPEED

APU OIL OVERTEMP

APU PUMP LEAK P

SMO APU THRM

APU GG/FU PMP HTR 1(2,3) AFF TEMP ↑

APU GG/FU PMP HTR 1(2,3) AFF TEMP ↓

APU GG/FU PMP HTR 1(2,3) H, L, M

APU TK/FU LN HTR 1(2,3)  ↑

APU TK/FU LN HTR 1(2,3)  ↓

APU TK/FU LN HTR 1(2,3) H, L, M

APU PUMP/LVL N HTR 1(2,3)  ↑

APU PUMP/LVL N HTR 1(2,3) ↓ H, L, M

Normal

APU SHUTDN

APU RESTART

APU SHUTDN

APU OPER – OFF

  FU TK VLV – CL

√Shutdn(HYD PRESS 200)

Report APU F7 Its

APU CNTLR PWR – OFF

⇒ √Auto SHTDN (three) – ENA

  √SPEED SEL (two) – NORM

### End Of Procedure ###

 

 

APU SPD HI          BFS, SM SYS SUMM 2

⇒ If SPEED % exceeds 111

Go to APU SHUTDN

### End Of Procedure ###

APU OVERSPEED/UNDERSPEED         BFS, SM SYS SUMM 2

If SPEED % exceeds 129 or if APU has Shut Down

  Go to APU SHUTDN

### End Of Procedure ###

APU OIL OVERTEMP         BFS, SM SYS SUMM 2

1.  BLR CNTLR/HTRT  __ B

⇒ If APU OIL OUT TEMP > 305 and OIL IN TEMP incr

2.  Perform APU SHUTDN

If AOA At M=7 SPEED SEL (two) – NORM

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

### End Of Procedure ###

APU PUMP LEAK P         BFS, SM SYS SUMM 2

1.  √MCC

⇒ If not AOA

2.  Go to APU SHUTDN >>

If AOA and two good APUs

3.  Perform APU SHUTDN, then

At M=7:

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

### End Of Procedure ###

1. √APU AUTO SHTDN – ENA

2. HYD MN PUMP PRESS – LO

3. APU CNTLR PWR – ON

4. OPER – INJ COOL (start watch)

If after 1.5 min, APU TEMP INJ not decr:

5. Go to APU SHUTDN >>

HYD MN PUMP PRESS – NORM 

At 3.5 min:

6. APU FU TK VLV – OP

OPER – START/RUN

HYD MN PUMP PRESS – NORM

7.Go to APU SHUTDN >>

8. √BLR N2 SPLY – ON

√PWR – ON

√CNTLR/HTR – A(B)

SMO THRM APU

√(Aff) APU HTR GAS GEN/FU PUMP – OFF on Panel A12 >>

APU GG/FU PMP HTR 1(2,3) AFF TEMP ↓

√(Aff) APU HTR GAS GEN/FU PUMP – A AUTO on Panel A12 >>

APU GG/FU PMP HTR 1(2,3) H, L, M

No Action >>

APU TK/FU LN HTR 1(2,3)  ↑

√(Aff) APU HTR TK/FU LN/H2O SYS (two) – OFF on Panel A12 >>

APU TK/FU LN HTR 1(2,3)  ↓

√(Aff) APU HTR TK/FU LN/H2O SYS (two) – AUTO on Panel A12 >>

APU TK/FU LN HTR 1(2,3) H, L, M

No Action >>

APU PUMP/LVL N HTR 1(2,3)  ↑

If APU was running and now shut dn, do not attempt restart until aff temp cool

APU PUMP/LVL N HTR 1(2,3) ↓ H, L, M

No Action >>

TK

VLV