73 Other Limits

Question 1

When you check the hydraulics during the before push procedure, what should the pressure be?

Answer 1

2800 psi minimum

Question 2

How long should the engines run at idle or taxi thrust before takeoff?

Answer 2

At least 3 minutes. If the engines have been shut down for more than 5 hours, they should be run at idle or tax for 5 minutes.

Question 3

What are the engine indications after a good start on a standard day at sea level (800/900/9ER)?

Answer 3

*N1: 19.4%
*N2: 58.8%
*EGT: 410 deg C
*Fuel flow: 600 lbs/hr

Question 4

What are the engine indications after a good start on a standard day at sea level (Max)?

Answer 4

*N1: 20.1%
*N2: 70.3%
*EGT: 610 deg C
*Fuel flow: 600 lbs/hr

Question 5

When should you accomplish the Engine Start - Aborted Start checklist?

Answer 5

Any of the following:
* N1 or N2 does not increase or increases very slowly after the EGT increases.
* The is no oil pressure indication by the time the engine is stable at idle.
* The EGT does not increase by 15 seconds after the engine start lever is moved to IDLE.
* EGT rapidly approaches or exceeds the start limit.

Question 6

When do icing conditions exist in flight?

Answer 6

When the total air temperature is 10 C or below

Question 7

When would anti-ice NOT be on?

Answer 7

During climb and cruise when the temperature is below -40 C SAT

Question 8

You are leaving cruise and starting your descent. The SAT is -47 C. Does the anti-ice need to be on?

Answer 8

Yes. Engine anti-ice must be ON prior to and during descent in all icing conditions, including temperatures below -40 C SAT.

Question 9

When should you NOT use wing anti-ice?

Answer 9

Do not operate wing anti-ice on the ground when the OAT is above 10 C (50 F)

Question 10

What are the Anti-Ice, Rain parameters?

Answer 10

Windshield wiper: Not on a dry windshield
Window heat: Must be on 10 minutes before takeoff
Probe heat: Must be on prior to takeoff
Wing anti-ice: During takeoff, do not use until after the 1st thrust reduction

Question 11

What are the United flap limit speeds?

Answer 11

Flaps 1: 240 kts
Flaps 2: 240 kts
Flaps 5: 230 kts
Then as placarded

Question 12

What is the minimum oil pressure for takeoff?

Answer 12

NG: 13 PSI
MAX: 17.4 PSI

Question 13

What is the MMO? How fast is that to the layperson? How about a GA pilot?

Answer 13

.82 Mach
620 miles per hour
540 knots

Question 14

What is the maximum gear extension speed?
What is the maximum ger extended speed?

Answer 14

270 knots / .82 Mach
320 knots / .82 Mach