Ch-4 Flashcards
Taxi and takeoff gross weight limitations:
Maximum normal: 164,000
Maximum alternate: 175,000
Landing gross weight limitations
Recommended: 142,000
Maximum normal: 164,000
Maximum alternate 175,000
Outboard tanks max
8310
Inboard tanks max
7650
Total main tanks
31,920
Aux tanks
5810
Total internal fuel weight max
43,540
External tanks
8,900
Fuselage tank
24,390
Total internal and external (fuel)
85,730
Primary fuel management
-Outboards contain 500-1000 more fuel than inboards
-main tanks full except start/taxi/takeoff fuel
-no less than 7060 in 1 & 4 and no less than 6410 in tanks 2 & 3 when external tanks have fuel
Alternate enroute fuel management
-May extend airframe service life
-when external and/or auxiliary tanks contain useable fuel 1&4 are maintained at max and 500-1000 more than 2&3
-w/ no fuel in aux & externals, 1&4 full, 2&3 used till 1520. 1&4 then used till 1520, tank-engine from there
Secondary fuel management
Anything not primary or alternate
Recommended loading limits
Area A: 3 g (symmetrical)
Area B & C: 2.5 g (symmetrical)
Alternate (cautionary) loading limits
Area D: 2.25 g (symmetrical)
Loading not recommended
Area E: 2 g (symmetrical)
Emergency situations
Landing gear doors removed
200 gear up
168 gear down
Flight is not permitted with forward nose gear door ______ and the aft door ______
Removed, installed
GS location - % Mac
15-30
External tank limits when fuselage tank is installed
If fuel is in the fuselage tank, external tanks should be empty when the fuselage tank contains less than 20,000 lbs. otherwise restricted to level flight
Taxing with inner brake locked, braking during revers taxiing
Prohibited
Taxi speeds & nose gear deflection
20 degrees
60 degrees
20 knots
5 knots
Taxiing w/ alternate gross weight
-Taxi & takeoff only on smooth surfaces free of dips depressions and holes
-max 10 knots
-taxi shortest distance possible
-minimum braking
-light braking in turns
-limit nose wheel to 5 degrees
-avoid abrupt or hard uneven brake applications
Max tire speeds
Nose-
Main-
139
174
Three categories of airfields (strength)
High strength
Marginal strength
Substandard
High strength airfields:
When Aircraft classification number (ACN) is greater than Pavement Classification Number (PCN)
Aircraft should normally NOT land on runway
Normal operation recommended tire deflection
35 %
Marginal strength airfields:
California bearing ratio (CBR) min
3,
Considerations should be given to operations having aircraft weights in excess of the weight limitation for 540 sink and on runways with CBR 6 or less
Predictions for number of passes on a marginal airfield are a function of _____ & _____ (figure 4.6-2)
Aircraft gross weight and CBR
Number of passes (for marginal field) based on recommendation of tire pressure corresponding to ____ tire deflection
39 %
(To prevent excessive tire damage, do not exceed 39 %)
Applicable airfield strength recommendations for marginal and substandard fields (8 thing)
-inflate/deflate main gear tires to recommended psi
-empty externals
-do not exceed 10 knots during taxi
-minimize breaking if porpoising
-minimize nose gear loads using elevator on landing rollout and T/O, load with mid or aft CH
-minimize reverse on unpaved
-shut off flight station AC on unpaved (prevents clogging of heat exchanger)
-limit gross weight to 164,000
Gross weight limits for substandard field
-Correspond to 540 sink rate
-Decision to use substandard should be made by appropriate authority
-Allow for increased maintenance and accelerated inspections
Maximum passenger load for extended over water operating more than 50 nautical miles from shore
-80 passengers including crew
-with mixed cargo and passengers, 35 per overhead exit
With any flap extension, load factor is
2 g symmetrical
1.5 unsymmetrical
Load factor limits:
Area A-
-1 - 3 symmetrical
0 - 2.33 rolling
Load factor limits:
Area B
0 - 2.5 symmetrical
0 - 2 rolling
Load factor limits:
Area C
0 - 2.5 symmetrical
0 - 2 rolling
Load factor limits:
Area D
0 - 2.25 symmetrical
0 - 1.83 rolling
Load factor limits:
Area E
Not recommended
High bank-angle limitations
-Apply to maneuvers beyond 60 degrees (flaps up) 45 degrees ( flaps extended)
-large aileron inputs should be made between 0.5 and 1.5 g
Prohibited maneuvers
-Aerobatics and spins
-practice stalls with power above 1000 HP
-practice asymmetric power stalls
-intentional zero or negative G maneuvers lasting longer than 7 seconds
-sustained airspeed below stick pusher speed
-intentionally maneuvering into a slide slip for a RUDDER alert
-abrupt longitudinal control inputs at high speeds (faster than 1 g per second increase or decrease)
-rapid toll reversals
Moderate to large rudder inputs held until slideslip followed by opposite rudder
Because of propulsion system limitations, avoid intentional negative and zero g maneuvers lasting longer than ______
7 seconds
Air start can be conducted with or without use of starter below ______
25,000 ft