B738 Limitations Flashcards
Max Ramp Weight
173,000 LB
Max t/o Weight
172,500 LB
Max Landing Weight
144,000 LB
Max Zero-Fuel Weight
136,000 LB
Max Weights subject to
w/b & loading concerns
Flaps Up G-loading
+2.5 to -1.0
Flaps Down G-loading
0 = G = 2.0
Runway slope
+/- 2%
Max Tailwind Component
10 kts, in spite of demonstrated 15 knot capability
Max Ops Altitude
FL 410
Max RWY Altitude
8,400 PRESSURE ALT. (8k for CAL?)
Pressure Altitudes below -2k ft, use ___. numbers
-2k ft perf
Max Flight LAT-itudes
82 N, to 82 S. Except:
1995 or 2005 Var. tables: 70 N for 80w - 130w (above Can)
60 S for 120e- 160e (below Aus)
- on opposite sides of mag north
for 2015 mag tables, 80 N and 72 S, same regions of long.
Holding in ice conditions, regards to flaps
flaps prohibited.
Max Fuel tank 1 or 2
1288 US gal. or 9,144 lbs or 4,147 kgs.
Center Tank
4,299 US gal. 30,522 lbs., or 13,843 kg.
Fuel tank loading sequence
any, but wing tanks should eventually be even.
If Center tank > 1,000 lbs,
Wing tanks must be full.
Max random Fuel Imbalance for taxi, t/o, landing? (the mains must be scheduled to even)
1,000 lbs.
If empty in center tank, how to feed engine?
Main tank - to - engine, w/ all operable main tank boosts on, and cross-feed valve closed.
With fuel in center tank, how to feed engine?
use center tank fuel with all operable pumps on, cross-feed closed* until center tank fuel is depleted, or at least less than 1k lbs. Then carry on as main tank feeding. *IF need to correct imbalance or under minimum fuel ops, can open cross-feed.
Center tank pumps on…
1) must be monitored for low prx lights
2) NOT on ground, UNLESS center tank quantity > 1k lbs,
except defuel/trxfer ops
3) off for t/o if center tank fuel 1k lbs.
8) CONFIG indicator goes when center pumps off and fuel >1600lbs. do NOT do QRH for this if
How can we exceed max ZFW
t/o, climb, and cruise, by 5k (ZFW + Center tank fuel), and 3k for descent and landing.
Center tank fuel pump fails w/ fuel in tank…
accomplish Fuel Pump Low abnormal procedure.
Defueling considerations (2)
- With pax onboard is prohibited
2. pumps off at first indication of low fuel
Max t/o & Land X-wind?
30 kts., or 20 for Auto-land
Doors safe in windspeed of ____?
40 to operate, 65 to be latched open
Max HDWIND for Autoland?
20kts
Gear Speeds:
extend: 270/.82
retract: 235
OPERation whilst extended, up to 320/.82
Flaps Speeds
1, 2, 5: 250 (if alternate extension, 235)
10: 210
15: 2 hunnies
25: 190
30: 175
40: 162
Instrument markings
red radial: max and mins
green arc: normal
amber arc: caution
Max Diff Px?
9.10 psi (relief valves). If inflight malfunction of system, it may be allowed to operate on relief valves.
Engine Bleed switches ON, Packs must NOT
be on HIGH for t/o, approach, or landing UNLESS Abnormal checklist requires it. Cargo fire, smoke removal, etc…
Aileron Trim with Autopilot engaged?
prohibited
min engagement alt. after t/o for AP?
400 AGL
For single channel AP ops during appch…
AP must be disconnected below 50 ft. AGL.
Unless in GA mode or coupled to full ILS, autopilot must be disengaged lower than ___ below MDA?
50 ft
Autoland GS window, and flaps?
2.5 - 3.25 degrees, and 30 or 40 flaps
on final below 1000 AFE, LVL CHG is
prohibited
Go-around after Touchdown or Go-around with an engine failing or failed,
then Go Around Manually
APU: Bleed + Electrical in flight
10k ft.
APU: Bleed + Electrical on ground?
15k ft.
APU: just bleed?
17k ft.
APU: just electrical?
41,000 ft
APU Start limitations?
none for altitude, and 3 aborted start attempts must be followed by a 15 cool-down period.
APU Bleed Valved must be closed when:
- Engine 1 bleed open
- ENG 2 + Isol. Valve open
- Ground Air + Isol Valve open
NOTE: APU Bleed valve can be open during Engine start, but ENG at idle until APU bleed closed.
If VHF on ACARS,
do not use VHF 3 for ATC comm.
Do not operate HF when…
refueling.
If one HF radio selected for Txmsn,
deselect the other HF radio on all audio select panels
flights predicated on the following frequencies are prohibited:
6 “5req”’s on pg. 56 of AOM.
Portable Oxygen bottle min PSI:
1500
Flaps alt.
FL 200, and no holding w/ flaps out in Ice conditions.
Alt. Flap duty cycle
- allow 15 seconds after releasing switch before moving switch again, to avoid damage to flap motor clutch.
- after complete extend/retract cycle, allow 5 mins to cool.
speed brakes limitations in flight
- not past FLT detent
2. not lower than 1000 Radar Alt.
Max tank fuel temp:
49 degrees C
Min. tank fuel temp:
-43 or frzng-point-plus-3 degrees C, which ever is higher. Using Fuel System Icing Inhibitor additives to not change any limitiations.
Intentional running of center tank pump when low px light illuminated?
prohibited.
Min HYD Qty for running electric pumps on ground?
1,676 lbs.
Window heat must be ON to the No. 1 (fwd) and No. 2 (side) windows when?
All normal ops, set to ON: 10 mins prior for t/o
ENG Anti-Ice to ON when
when OAT on ground or TAT in flight
DO NOT use anti-ice when…
for ENG, TAT > 10
for WING on grnd, OAT > 10
Assumed temp reduced t/o prohibited when:
a. Anti-skid inop
b. Windshear reports
c. ECC’s in ALTN mode (also no derated thrust)
Brakes to RTO or OFF for takeoff, and RVR
200, RTO
2 ADF’s req’d when
dispatched to airport with only NDB approach available.
ADIRU alignment not attempted beyond
78, 15min of lat.
Wx Radar must not be operated
1) in a hangar, except when test mode
2) when personnel are within the area normally enclosed by radome
3) near fueling or exposed fuel
Eng. Inst markings
Red line is max limit and min limits.
amber arc is cautionary
white arc is normal
CONT ignition for
t.o., landing, heavy rain, during anti-icing.
ENG start duty cycles
max start attempt for 2 mins, w/ 10 secs between.
EGT limits
950 for 5 mins at t/o (or for 10, OEI)
925 max cont.
725 for start.
Min Oil Px
13 psi. if Oil Px in yellow arc w/t.o. thrust set, do not t/o!
Max Oil Temp:
140 cont.
155 momentary/temporary
140-155 limited to 15 mins.
When using Assumed Temp, thrust reduction may never exceed ____ of full or derated thrust.
25%
GPWS terrain display for navigation?
Prohibited
Do not use look-ahead terrain alerting/display functions when:
within 15nm of airport of intended use which is not in the GPWS database, for t/o, approach, or landing.
Crew O2 req’s are based on bottle temp, number of crew, and found in AOM
5.08/1 (Chapter 1 lim’s, last page)
