MD-88/90 Limitations Flashcards
Maximum Takeoff and Landing Tailwind Component
10 kts
Or as permitted by Delta Special page
Maximum Operating Altitude
37,000 feet
Maximum Takeoff and Landing Pressure Altitude
8,500 feet
Maximum takeoff and landing crosswind component
30 kts (including gusts)
Turbulent air penetration speed
Lower of:
280 +- 5 kts
.77 +- .02M
Wing landing lights cooling
- 5 minutes after initial extension or retraction
- 5 minutes after subsequent extension or retraction
Lamps should be off in still air periods greater than 10 minutes
Maximum Taxi Weight (MTW)
-88 150,500
-90 166,500
9219 168,500
Maximum Takeoff Weight (MTOW)
-88 149,500
-90 166,000
9219 168,000
Maximum Landing Weight (MLW)
-88 139,500
-90 142,000
9219 142,000
Maximum Zero Fuel Weight (MZFW)
-88 122,000
-90 132,000
9219 132,000
Maximum relief valve pressure
8.32 PSI
Maximum 🔼 P
8.07 PSI
Autopilot engagement
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
FMS Vertical and Lateral Engagement
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
Autoflight (OEI)
Coupled ILS approaches not permitted. Disconnect prior to GS capture
Use of windshear guidance is prohibited
Autoland
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
Autoland prohibited
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
Autoland Wind Speeds
Headwind 25 knots
Crosswind 15 knots
Tailwind 10 knots
AC voltage range
115 +-3 volts
AC generator loads
0-1.0 continuous
- 0-1.5 5 minute maximum
- 5 + 5 second maximum
Same side DC loadmeters
.3 maximum difference
DC load range
- 88 0 to 1.0
- 90 0 to 1.5
Automatic Reserve Thrust (ART)
Must be off when using flex thrust
Engine Ignition (required on)
-88
Takeoff Landing Turning engine anti-ice on/off Severe turbulence Heavy rain
Engine Ignition (required on or auto)
-90
Auto
Takeoff
Landing
On
Severe turbulence
Heavy rain
Engine starter limits
-88
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
Engine starter limits
-90
3 attempts of 2 minutes each with 15 seconds in between
OR 4 minutes continuous cranking
30 minutes for cooling
Engine synchronization
Off below 1,500 AFE
APU starter limits
3 attempts with 5 minutes between
One hour off after third attempt
Speedbrakes
May not be used with flaps extended
Do not extend gear with speedbrakes extended
Rudder
Must be powered and unrestricted for takeoff
Spoilers
Do not arm prior to gear extension
Flap/slat extension speeds (Delta)
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
Altimeter crosscheck
60 feet between CA and FO
75 feet between either CA or FO & field elevation
200 between CA and FO in RVSM airspace
Inertial Reference System (IRS)
At least one MCDU required for ground alignment
Autoland inhibited in ATT or off mode
EGPWS must be in OVRD in ATT mode
Lateral fuel imbalance
1500 pounds between main tanks
Fuel heat
OFF for takeoff, landing and go-around
