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Bell 412 Limits

  1. Max deck loading limit?
    100 lbs/sq inch
  2. Max cargo tie down fittings limit?
    • 1250 lbs vert
    • 500 lbs horiz
  3. Baggage compartment load limit?
    400 lbs
  4. Min crew?
    Pilot in front right seat
  5. AFCS mode for prolonged ground ops?
    SAS mode
  6. IFR required equipment?
    • Both autopilots in ATT mode
    • Heated pitot/static sys
    • Pilot windshield wiper
    • 2x VHF radios
    • 2x nav receivers with aux equip for IFR
    • DME equip
    • ATC transponder
    • Marker beacon
    • 3 inch STBY AI
    • Pilot IVSI
    • Force trim
    • Blackout curtains
    • EMERG comms panel for single pilot ops

    AFCS test prior to IMC
  7. Max gross weight?
    11900 lbs
  8. What chart should be referred to for max allowable weights?
    WAT Chart. Weight Altitude Temp Chart
  9. Min gross weight?
    6400 lbs
  10. Min IFR IAS?
    60 KIAS
  11. Vne?
    140 KIAS decreasing by 3 kts every 1000 ft above 3000 ft
  12. Vne when >81% mast TQ?
    105 KIAS
  13. Vne with only 1x AFCS helipilot?
    115 KIAS
  14. Vne steady state AUTO?
    105 KIAS
  15. Vne cargo doors opened asymmetrically?
    80 KIAS
  16. Vne cargo doors in transit or unlocked?
    60 KIAS
  17. Vne cargo doors symmetrically opened/removed?
    100 KIAS of Blanket Interior or Deluxe Interior fitted
  18. Vne sideways/rearwards flight?
    35 KIAS below 3000 ft
  19. Max operating altitude?
    20000 ft
  20. Max DA for IGE ops?
    14000 ft
  21. Prohibited manoeuvres?
    • >50° AOB
    • >15° ND
    • >30° NU
  22. Max IFR ROC/D?
    1000 ft/min
  23. Max IFR approach slope?
    5°
  24. Slope limits?
    • 10° sideways
    • 4° NU/ND
  25. Min operating temp?
    -40° C or -25° if bty cold soaked
  26. Max wind on start/stop?
    45kts or 35 with 10kt gusts
  27. Generator load?
    • Cont ops 0-75 Amps
    • Caution 75-100 Amps
    • Max cont 150 Amps each
  28. Starter limits?
    • 30 sec ON - 1 min OFF
    • 30 sec ON - 5 min OFF
    • 30 sec ON - 15 min OFF
  29. N1 limits?
    • 2 ENGINES:
    • Cont ops ..... 61 - 103.2%

    • OEI:
    • 30 min ..... 103.2 - 106.8%
    • 2.5 min ..... 106.8 - 109.2%
  30. N2 limits?
    • Min cruise <6000 ft ..... 97%
    • Min hvr/takeoff/climb ..... 100%
    • Min >6000 ft ..... 100%
    • At or below 30% eng TQ ..... 100-104.5%
  31. ITT limits?
    • 2 ENGINES:
    • Cont ops ..... 300 - 810°
    • Transient ..... 810 - 940° for 5 sec
    • Start ..... 960 - 1090° for 2 sec

    • OEI:
    • MCP ..... 840°
    • 30 min ..... 840° - 885°
    • 2.5 min ..... 885° - 940°
  32. Eng TQ OEI limits?
    • MCP ..... 59%
    • 30 min ..... 59 - 77%
    • 2.5 min ..... 77 - 81%
  33. Fuel pressure limits?
    Cont ops ..... 4 - 35 psi
  34. If starting in cold cond, how long can engine oil pressure exceed max limits?
    2 min
  35. Engine oil pressure?
    • Idle <79% N1 ..... 40 - 90 psi
    • Cont ...... 90 - 115 psi
  36. Engine oil temp?
    0 to 115°
  37. C-box oil pressure?
    • Idle <94% N2 ..... 40 - 60 psi
    • Cont ...... 60 - 80 psi
  38. C-box oil temp?
    0 to 115°
  39. TXMSN oil pressure?
    • Idle ..... 30 - 40 psi
    • Cont ...... 40 - 70 psi
  40. TXMSN oil temp?
    15 to 110°
  41. Mast TQ limit?
    • MCP ..... 81%
    • Takeoff ..... 81 - 100% for 5 min
  42. No takeoff power above what speed?
    105 KIAS (81% TQ)
  43. Nr power on/off?
    • Power on:
    • Cont <6000ft ..... 97 - 100%
    • Eng TQ <30% ..... 100 - 104.5%

    • Power off:
    • >8000 lbs ..... 91 - 104.5%
  44. Nr for ground ops?
    • Min ..... 77%
    • Min if cyc cent not working ..... 97%
    • Avoid ..... 26 - 77%
  45. Hyd pressure limits?
    • Caution ..... 600 - 900 psi
    • Cont ops ..... 900 - 1100 psi
  46. At what temp does the Hyd temp light come on?
    88°C
  47. Rotor brake application?
    40% Nr
  48. Heater operation temp limit?
    No operating above 21°C
  49. Hovering wind direction limits?
    • OGE
    • 30 - 95° ..... critical for pedals
    • 180 - 270° ..... critical for cyclic

    • IGE
    • 45 - 105° ..... critical for pedals
    • 180 - 270° ..... critical for cyclic
  50. 412 Avoid curve?
    • 0 to 40kts ..... 16 ft to 375 ft
    • Slower you are, the higher you must be
Author
Whitto82
ID
330682
Card Set
Bell 412 Limits
Description
B412 Limits
Updated

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