MD-88/90 Limitations

Question 1

Maximum Takeoff and Landing Tailwind Component

Answer 1

10 kts

Or as permitted by Delta Special page

Question 2

Maximum Operating Altitude

Answer 2

37,000 feet

Question 3

Maximum Takeoff and Landing Pressure Altitude

Answer 3

8,500 feet

Question 4

Maximum takeoff and landing crosswind component

Answer 4

30 kts (including gusts)

Question 5

Turbulent air penetration speed

Answer 5

Lower of:

280 +- 5 kts
.77 +- .02M

Question 6

Wing landing lights cooling

Answer 6

1. 5 minutes after initial extension or retraction
2. 5 minutes after subsequent extension or retraction

Lamps should be off in still air periods greater than 10 minutes

Question 7

Maximum Taxi Weight (MTW)

Answer 7

-88 150,500
-90 166,500
9219 168,500

Question 8

Maximum Takeoff Weight (MTOW)

Answer 8

-88 149,500
-90 166,000
9219 168,000

Question 9

Maximum Landing Weight (MLW)

Answer 9

-88 139,500
-90 142,000
9219 142,000

Question 10

Maximum Zero Fuel Weight (MZFW)

Answer 10

-88 122,000
-90 132,000
9219 132,000

Question 11

Maximum relief valve pressure

Answer 11

8.32 PSI

Question 12

Maximum 🔼 P

Answer 12

8.07 PSI

Question 13

Autopilot engagement

Answer 13

Do not engage on takeoff below 400 AGL

Non-ILS approaches, disconnect no later than 50ft below MDA

Coupled approaches not using autoland, disconnection required if AP TRIM light is on 3 seconds after stabilized and on glideslope

Question 14

FMS Vertical and Lateral Engagement

Answer 14

NAV must not be engaged to FD or AP in climb until above 400 AGL

VNAV must not be engaged to FD or AP in climb until above 1000 AGL

NAV and VNAV must be manually engaged for landing approach when below 400 AGL

Question 15

Autoflight (OEI)

Answer 15

Coupled ILS approaches not permitted. Disconnect prior to GS capture

Use of windshear guidance is prohibited

Question 16

Autoland

Answer 16

Flaps 28 or 40 only
Successful preflight of associated DFGC
Missed required if AP TRIM is on longer than 3 seconds after stabilized and tracking GS

Question 17

Autoland prohibited

Answer 17

ALIGN not annunciated on an FMA by 100 RA
OEI above 50 feet AFE
Abnormalities in manual flight control system
Autospoilers inop
Both buses powered by single generator

Question 18

Autoland Wind Speeds

Answer 18

Headwind 25 knots
Crosswind 15 knots
Tailwind 10 knots

Question 19

AC voltage range

Answer 19

115 +-3 volts

Question 20

AC generator loads

Answer 20

0-1.0 continuous

1. 0-1.5 5 minute maximum
2. 5 + 5 second maximum

Question 21

Same side DC loadmeters

Answer 21

.3 maximum difference

Question 22

DC load range

Answer 22

• 88 0 to 1.0

- 90 0 to 1.5

Question 23

Automatic Reserve Thrust (ART)

Answer 23

Must be off when using flex thrust

Question 24

Engine Ignition (required on)

-88

Answer 24

Takeoff
Landing
Turning engine anti-ice on/off
Severe turbulence
Heavy rain

Question 25

Engine Ignition (required on or auto) -90

Answer 25

Auto Takeoff Landing On Severe turbulence Heavy rain

Question 26

Engine starter limits -88

Answer 26

90 cumulative seconds -may be 3 normal starts of 30 seconds each if engine allowed to stop turning 5 minutes off for cooling 30 seconds on and 5 minutes off subsequently

Question 27

Engine starter limits -90

Answer 27

3 attempts of 2 minutes each with 15 seconds in between OR 4 minutes continuous cranking 30 minutes for cooling

Question 28

Engine synchronization

Answer 28

Off below 1,500 AFE

Question 29

APU starter limits

Answer 29

3 attempts with 5 minutes between One hour off after third attempt

Question 30

Speedbrakes

Answer 30

May not be used with flaps extended | Do not extend gear with speedbrakes extended

Question 31

Rudder

Answer 31

Must be powered and unrestricted for takeoff

Question 32

Spoilers

Answer 32

Do not arm prior to gear extension

Question 33

Flap/slat extension speeds (Delta)

Answer 33

Slats mid/flaps 11 280/.57 Mach Slats full/flaps 15 240/.57 Mach Slats full/flaps 23. 220/.57 Mach Slats full/flaps 28/40 200/.57 Mach

Question 34

Altimeter crosscheck

Answer 34

60 feet between CA and FO 75 feet between either CA or FO & field elevation 200 between CA and FO in RVSM airspace

Question 35

Inertial Reference System (IRS)

Answer 35

At least one MCDU required for ground alignment Autoland inhibited in ATT or off mode EGPWS must be in OVRD in ATT mode

Question 36

Lateral fuel imbalance

Answer 36

1500 pounds between main tanks

Question 37

Fuel heat

Answer 37

OFF for takeoff, landing and go-around