Limitations


AIR                


Pack Trip triggers:

  • Compressor discharge temp over 218 C,
  • ACM outlet temp over 85C,
  • Doors/Bypass valve out of sequence,

Pressure Relief Valve open on 3 Pack jet. (Trips #2 Pack).

Zone: 57 C.

Zone UD OvrHt: 85 C.


Pneumatic sources:

  • Low - 8th stage compressor bleeds
  • High - 14th stage compressor (15th for P/W) bleeds,
  • APU
  • Ground cart


APU 
 
Starting: 900° C* or 990° C 
Continuous: 670° C* or 657° C 
* With lower limit scale gauge

1 min "ON," 5 minutes "OFF," 3 attempts per hour.
61 seconds to 90 seconds "ON," 15 minutes "OFF," 2 attempts per hour.

7% Fuel and Ignition,
50% Starter cutout,
95% Ignition cutout,
110% Overspeed.  

Not permitted in icing conditions. <15,000 feet (20,000’ in-flight start- if placarded).  
Electrical Power: Not Permitted in-flight except up to 15,000 feet all engines generators inoperative


AUTO PILOT   

 
Engage above: 1200’.
Disconnect below: 50’.


CARGO          
 
Lower Cargo Fire detection:
6 Smoke det units, 2fwd&4 aft,
Any detector triggers both pilot FIRE, Overhead LWR CARGO FIRE, & F/E FWD or AFT FIRE lights 
Main Cargo Fire detection: 5 modules with A & B loops, both loops must detect fire with "Both" selected.

 

DOORS          
 
Nose cargo door power source:
Cargo Handling Bus (#2 APU/#2GPU).
NOSE & SIDE CARGO DOOR:
Door opened: 65 knots. Door operating: 40 knots

 

EGT                
 
Max CF6 :
Acceleration:
960 °C (2 min)  
Continuous:
910 °C,  
Start:
750 °C (900 °C allowed for up to 40 seconds)
Takeoff:
945 °C (5 min)


EIDS              

PENNY & GILES: "Compacted" view (reversion mode) approved for takeoff only when engine digital mode is selected on the other display. System requires two fully working Display Units, with no major bit errors occurring. If any major bit errors occur prior to takeoff, takeoff will not be initiated.

Takeoff will not be initiated if the engine instruments display any engine exceedance. Notify maintenance.


ELECTRICAL 

AC: 115  +/- 5V. 400 +/- 5 Hertz.

DC Batt & TR: 25-32V.

APU Batt: 25-36V.  

APU Ext: 250 Amps.

Gen Isolated: 54KW (81KW 5mins).

3-4 Gen Paralleled: 51KW.

2 Gen Para: Total 81KW.

Load Spread 10 KW / 20 KVAR.

TR Loads:

  • Cont: 75 Amps,
  • 30mins: 93 Amps,
  • 5mins: 113 Amps,
  • No Air Flow: 54 Amps. 

CSD Max Oil Temp: 145C.


FLAPS            


Limit speeds:    1: 275kts.         5: 255kts          10: 238kts.       20: 231kts.       25: 205kts.       30: 180kts.       25-30 Alt Ext: 160kts.


FUEL

Less than 2000lbs in any main tank DO NOT exceed 8° nose up body angle.

Max Imbalance X ship Sym tanks: 500kgs.  

Jettison Max Imbalance 2000kgs.


Min Fuel Temp:

  • Fuel freeze point +3C above freezing point of fuel used.
  • Jet A: -40C
  • JetA&A1Mx: -43C
  • JP5-46C
  • Jet A1 JP8 -47C
  • Jet B: -50C


Max Fuel Temp:

  • +54.5C (130F)       
  • +43C (110F) JP4

Centre Wing Tank:         64,352 L    17,000 US Gal              120,700 lbs       52160 kgs
Main Tank 1 or 4:
          16,100 L       4,253 US Gal               30,196  lbs       13125 kgs

Main Tank 2 or 3:
           46560 L     12,300 US Gal               87,330  lbs       38125 kgs
Reserve Tank 1 or 4:
      1,893 L           500 US Gal                 3,550  lbs         1550 kgs

Total All Tanks:
             193457 L     51,106 US Gal             362,852 lbs    157,760 kgs

 

HYDRAULIC


Systems 1 & 4: 7.5gal,

Systems 2 & 3: 4.5gal.

 

Operating Pressures:

  • Normal: 3000psi, 
  • Press LOW Lt On: 1200psi,
  • ADP On: 2600psi,
  • Relief: 3500psi. 


On the ground, EDP and ADP must not be operated for more than 15 minutes when the fuel quantity is below the following quantity:

  •         No. 1 and No. 4 main fuel tank: 2,500 pounds (375 gal)
  •         No. 2 and No. 3 main fuel tank: 5,300 pounds (805 gal)

On the ground, No.4 electric pump must not be operated for more than 15 minutes when the quantity of fuel in No.4 main tank is 2,500 pounds or below.  Same rule is applied to No.1 system, if installed


ICE

Min N1 RPM in Icing Conditions:

  • 50% N1 at or above 10,000 feet;
  • 45% N1 below 10,000 feet;
  • 70% N1 with no Hi Stage bleed.On the ground and for takeoff:

Outside air temperature 50° F (10° C) or below, visible moisture in any form is present (clouds, fog with visibility of one mile or less, rain, snow, sleet, or ice crystals).

Ramp, Taxiway, and Runway conditions where surface snow, ice, standing water or slush may be ingested by the engine or freeze on engine, nacelle or engine sensor probes.

In-flight: Total air temperature 10° C or below, visible moisture in any form is present (clouds, fog with visibility of one mile or less, rain, snow, sleet, or ice crystals


IGNITION       

ON for:

  • Landing
  • Heavy rain.
  • Severe turbulence
  • Volcanic dust (Use System 1 and System 2).
  • Icing conditions
  • Standing water or slush on runway.

 

LDG GEAR    


Speed Placard:

  • Extend: 270 knots / M 0.82,
  • Retract: 250 knots / M 0.82,
  • Extended: 320 knots / M 0.82. 
  • Alt Ext: 230kts/.82M. 

Ground speed max: 204kts.


Degrees of NGS max -

  • w/ rudders 7 degrees    
  • w/ tiller:  70 degrees.

NLG: 180-185psi.

MLG: 195-200psi.

Size all gear: 49x19-20 34 PR.

 

OIL


Oil Pressure:

  • Minimum: 10psi.
  • Caution 10-30psi.
  • Normal: 30-90psi.

Max Temp:

  • 175C. 15mins:
  • 160-175C.
  • Cont: 50-160C.  

Max consumption/hr: ½ Qt. 

Minimum quantity for dispatch:

  • Enroute: ½ full, as appropriate.
  • Maintenance station: Full.  

Normal oil pressure range: Green band. 

Minimum: Yellow band.  

During cold weather starting, oil pressure in excess of 90 psi may be evidenced until oil viscosities are reduced by increasing oil temperature. Engine operation is limited to idle power when oil pressure is in excess of 90 psi during cold weather starts


OXYGEN         

Home base: 1500,

Other Stations: 1000,

Supernumerary: 1600.


PRESSURE

Norm 8.5psi. 

Max: 9.4psi.

Auto Cabin Pressurization Controller PSI: 8.9psi 

Cabin Pressure Relief Valve Limit:  9.25psi.  

Backup:  9.75psi.Horn Trigger: 10,000'

            

Max differential T/O & Ldg:  .11psid (220’)


 

RPM               

CF6 N1: 118.5%  (4068rpm)  

CF6 N2: 109.5% (10760rpm).   

%N1/N2:

  • Ground Idle: 26/65 @ 15C.  
  • Flight Idle: 42/78 @ 10 C.

 

RUNWAY      

Min Pavement Required for 180 turn:

  • w/ BGS 153'  
  • w/o BGS: 170' 

Max Slope: 2%

 

SIZE               

Wing Span: 195' 8"     

Length:  231'10"         

 Height:   63' 5"

 

STARTER       

Max re-engage 30% N2.  Max Cont. Op: 5mins.


V SPEEDS      

Mmo: 0.92M. 

Vmo: Max A/S Pointer Indicator.

Vmc SL: 290kts. 

Vmc FL240: 392kts.

Turb: 290-310kts / .82-.85 Mach.

V1= <Vr, >Vmcg & <Vmbe. 

Vr = >Vmca.

V2 = >1.2Vs & >1.1Vmca.

Vref = >1.3Vs.

 

Vref                

Bug Speed additive:

  • TE Flap Assym: +25. 
  • 2 Hyd Sys Inop: +20. 
  • Jammed Stab: +20.
  • 1 Eng Rev: +20.
  • LE Flaps Not Ext: +20.
  • Ice LE Flaps Ldgr: +10.


WEIGHTS      

MTXW: 379000kgs.

MTOW: 377800kgs.

MLGW: 302000kgs.

MZFW: 267600kgs.

MIFW Flaps: 306600kgs.

Res Fuel Txfr: 318870ks.


WINDS           

Max T/O or Landing Tailwind: 10 Knots. 

Two Hyd Sys Inop: 20kts. 

Rudder Ratio Lt:20kts.  .

                       CWC:  T/O W/D: 30kts.  Ldg Dry: 30kts.  Ldg Wet: 25kts.  T/O Contaminated: 15kts.  Ldg Contaminated: 10kts.

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