Systems Ground School

B747-200

1.   APU Auto shut down if:

Air inlet ices over
APU fire
Fuselage APU duct rupture
Oil pressure low
Oil temp high
EGT, RPM, TT2 sensor fails
EGT excessive
RPM excessive
Cooling fan air valve not open
Battery switch off (2-4 second delay)

2.   APU EGT Limits:

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

3.   APU Key RPMs:

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

4.   APU Starter Limitations: 1 minute "ON," 5 minutes "OFF," 3 attempts per hour.
61 seconds to 90 seconds "ON," 15 minutes "OFF," 2 attempts per hour.

5.   Auto Cabin Pressurization Controller PSI: 8.9psi

6.   AUXILIARY POWER UNIT (APU) INFLIGHT USE (As Placarded): Below 15,000 feet (20,000 feet for inflight start
- if placarded).  Not permitted in icing conditions.
Electrical Power: Not Permitted inflight except up to 15,000 feet with all engines generators inoperative.

7.   Cabin Pressure Relief Valve Limit: 9.25psi Backup 9.75psi

8.   Cabin Pressurization Horn Trigger: 10,000'

9.   Carousel IV-A INS Limits: Extended Time Limits RNP-10 | BRNAV/RNP-5
Dual DME : 5.9 hrs | 2.0 hrs   Single DME : 5.7 hrs | 2.0 hrs    Manual Update : 5.2 hrs | N/A

10.  Center Wing Tank: 17,000 US Gal 120,700 lbs

11.                       CF6 Max EGT Acceleration: 960 °C (2 minutes)*

12.                       CF6 Max EGT Continuous: 910 °C

13.                       CF6 Max EGT Start: 750 °C (900 °C allowed for up to 40 seconds)

14.                       CF6 Max EGT Takeoff: 945 °C (5 minutes)

15.                       CF6 N1 RPM: 118.5%

16.                       CF6 N2 RPM: 109.5%

17.                       Degrees of NGS max - w/ rudders 7 degrees    w/ tiller:  70 degrees

18.                       Either System 1 or System 2 FLT START required when::

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

19.                       HYDRAULIC SYSTEM Limits: 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.

20.                       ICING CONDITIONS - Inflight: 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).

21.                       ICING CONDITIONS - 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.

22.                       JT9D Max EGT Acceleration: 660ºC (2 minutes)

23.                       JT9D Max EGT Continuous: 620ºC

24.                       JT9D Max EGT Start: 535ºC

25.                       JT9D Max EGT Takeoff: 685ºC (5 minutes)

26.                       JT9D N1 RPM: 106.2/105.8%*  *N1 gages showing 105.8% limit markings may be used, provided  gage limit observed.

27.                       JT9D N2 RPM: 103.5%

28.                       LANDING GEAR OPERATING SPEEDS:

Extend: 270 knots / M 0.82
Retract: 250 knots / M 0.82
Extended: 320 knots / M 0.82

29.                       Low Fuel: Less than 2000# in any main tank  DO NOT exceed 8° nose up body angle.

30.                       Lower Cargo Fire detection: 6 Smoke detector units, 2 forward and 4 aft,

Any detector triggers both pilot FIRE, Overhead LWR CARGO FIRE, and F/E FWD or AFT FIRE lights.

31.                       Main Cargo Fire detection: 5 modules with A & B loops,Both loops must detect fire with "Both" selected.

32.                       Main Tank 1 or 4: 4,253 US Gal 30,196 lbs

33.                       Main Tank 2 or 3: 12,300 US Gal 87,330 lbs

34.                       Max Fuel Temp: +54.5C (130F)        +43C (110F) JP4

35.                       Max Runway Slope: 2%

36.                       Max T/O or Land Tailwind: 10 Knots

37.                       Min Fuel Temp: Fuel freeze point +3C about the freezing point of the fuel used. JetA freeze -40C / JetB freeze -50C

38.                       Min Pavement Required for 180 turn   With BGS 153'   Without BGS: 170'

39.                       Minimum 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

40.                       Minimum OIL QUANTITY for dispatch:: ENROUTE: ½ full, as appropriate.MAINTENANCE STATION: Full.

41.                       MMO: 0.92M

42.                       Nose cargo door power source: Cargo Handling Bus (#2 APU/#2GPU)

43.                       OIL PRESSURE 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.

44.                       Pack Trip triggers:

Compressor discharge temp over 218C
ACM outlet temp over 85C
Doors/Bypass valve out of sequence
Pressure Relief Valve open on 3 Pack jet. (Trips #2 Pack)

45.                       PENNY & GILES ENGINE INSTRUMENT DISPLAY SYSTEM (EIDS) Limitations: "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 exceedeance. Notify maintenance.

46.                       Pneumatic source: 8th and 14th stage compressor (15th for P/W) bleeds, APU or Ground carts.

47.                       Pneumatic users:

Engine start,
Packs,
Pressurize Cabin, Hydraulic Reservoirs & Water tank,
LE Flaps,
ADP Hydraulic pumps,
Wing anti-ice,
Aft cargo heat.

48.                       Pulling APU fire handle will:

 Electrically shutdown APU,
Arm bottle discharge button,
Silence right wheel well warning horn,
Close main fuel valve,
Close APU door,
De-power both AC and DC fuel pumps

49.                       Pulling engine fire handle will::

Arm fire bottle discharge buttons,
Close engine fuel shutoff valve,
Close hydraulic supply valve to EDP,
Energize EDP depressurizing solenoid,
Trip generator field and GB,
Close engine bleed air valve.

50.                       Reserve Tank 1 or 4: 500 US Gal 3,550 lbs

51.                       Southern Air Cargo Compartment Class: E. Fire/Smoke Detectors but No fire extinguishing.

52.                       Total All Tanks: 51,106 US Gal 362,852 lbs

53.                       VMO: Max A/S Pointer Indicator

54.                       WIND LIMITS FOR NOSE AND SIDE CARGO DOOR: Door opened: 65 knots. Door operating: 40 knots.

55.                       Wing Span 195' 8"  Length  231'10"   Height:   63' 5"

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B747-200F@hotmail.com,
23 Mar 2011, 11:06
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