Limitations - LIM-49 APU

Question 1

089- APU:

General:

OIL Quantity

LIM-49-10

Answer 1

The APU may be Started and Operated with the

LOW OIL LEVEL ECAM Advisory is Displayed

Maintenance Action is Required Within Next 10H of APU Operation.

Question 2

090- APU:

General:

APU Starter

LIM-49-10

Answer 2

After 3 Starter Motor Duty Cycles,

— Wait 60 min Before Attempting 3 More Cycles

Question 3

091- APU:

General:

Rotor Speed

LIM-49-10

Answer 3

Maximum N (ECAM Display)

— 107%

The APU Automatically Shuts Down at 107% N Speed

Question 4

092- APU:

General:

EGT:

Max EGT

LIM-49-10

Answer 4

Max EGT for start:

Below 25000 Ft

— 900° C

Above 25000 Ft

— 982° C

Max EGT with APU Already Running:

— 682° C –> 5 Sec Confirmation for Shutdown

— From 700° C to 742° C –> Immediate Shutdown

Note: B-HSQ, B-HSR Have Different Values

Question 5

093- APU:

Envelope:

APU Operation Limits

LIM-49-20

Answer 5

APU Operation and Restart Limit:

— FL 410

APU BATT Restart Limit (ELEC EMER CONFIG)

— FL 250

APU Used for ELEC Only

— FL 410

APU Used for ELEC + BLEED

— FL 200

With the Above the APU Start is Guaranteed:

— Within 3 Consecutive Start Attempts

Question 6

094- APU:

Envelope:

Electrical Power

LIM-49-20

Answer 6

Electrical Power Available At or Below 25000 Ft:

ISA +35° C and Below:

— 90 KVA

Question 7

095- APU:

Envelope:

Air Bleed Extraction

LIM-49-20

Answer 7

Air Bleed Extraction for:

ENG Start Up To

— 15000 Ft IF Speed BELOW 150 Kt

ENG Start Up To

— 20000 Ft IF Speed ABOVE 150 Kt

TWO PACKS Up To

— 15000 Ft

ONE PACK Up To

—- 20000 Ft