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 ###

 

 

APU RESTART

1. APU AUTO SHTDN – ENA

2. HYD MN PUMP PRESS – LO

3. APU CNTLR PWR – ON

4OPER – INJ COOL (start watch)

If after 1.5 min, APU TEMP INJ not decr:

5Go to APU SHUTDN >>

HYD MN PUMP PRESS – NORM 

At 3.5 min:

6APU FU TK VLV – OP

OPER – START/RUN

HYD MN PUMP PRESS – NORM

If restart unsuccessful:

7.Go to APU SHUTDN >>

8. BLR N2 SPLY – ON

√PWR – ON

√CNTLR/HTR – A(B)

 

 

SMO THRM APU

APU GG/FU PMP HTR 1(2,3) AFF TEMP

√(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 >>

 

 

 

 

 

APU

CL

CNTLR

ENA

FU 

HYD

NORM

OPER

PWR

SEL

Shutdn

TK

VLV