TH-67 IERW

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Author:
neogeisha
ID:
22615
Filename:
TH-67 IERW
Updated:
2010-06-09 08:08:43
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TH Limits
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TH-67 Flash Cards, Chapter 5 Limitations
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  1. 5-6. ENGINE OIL TEMPERATURE
    • [G] 0°C to 107°C Continuous Operation
    • [R] 107° Max
  2. 5-6. ENGINE OIL PRESSURE
    • [Y] 50 PSI Min Below 78%N1
    • [G] 90 PSI Min from 78% to 94% N1
    • [G] 115PSI Min above 94% N1
    • [R] 50 PSI Min, 130 Max
  3. 5-7. TRANSMISSION OIL PRESSURE
    • [G] 30 to 50 PSI Coninuous operation
    • [R] 30 PSI min, 70 PSI max
  4. 5-7. TRANSMISSION OIL TEMP
    • [G] 15°C to 110°C Continuous operation
    • [R] 110°C Max
  5. 5-8. FUEL PRESSURE
    • [R] 4.0 PSI Min
    • [G] 4.0 to 30 PSI continuous operation
    • [R] 30 PSI Max
    • {R} 8 PSI Min- type A,A-1, JP-5, JP-8 fuel below-18°C(0°F) to -32°C (-25°F)
  6. 5-8. LOADMETER
    [R] 70.0% Max
  7. 5-9. AIRSPEED
    *NOTEAutorotations above 100 KIAS will result in high rates of descent and low rotor RPM.

    • [G] 0 to 130 Knots Continuous Operation
    • [R] 130 Knots Maximum
    • [B] 100 Knots Maximum for Autorotation

    *VNE for internal gross weight above 3,200 pounds is 78 KIAS, not to exceedplacarded VNE.
  8. 5-10. TURBINE OUTLET TEMPERATURE
    • [G] 100 to 738oC Continuous
    • [Y] 738 to 810oC Take-off Power Range (5 minute limit)
    • [R] 810oC Maximum810oC to 843oC, 6 second transient (Not to be used intentionally).
    • [R] 927oC Maximum during Starting and Shutdown (10 seconds Maximum)

    *NOTE* The Red Warning light illuminates when either of the followingconditions are exceeded 810oC to 927oC for 10 Seconds, or higherthan 927oC.
  9. 5-10. TURBINE OUTLET TEMPERATURE
    CAUTION
    Exceeding the limits of 810oC TOT or 100% torque may cause N1topping with resultant rotor droop.
  10. 5-11. GAS PRODUCER (N1)
    • [G] 60 to 105% Continuous Operation
    • [R] 105% Maximum105 to 106% Transient (15 seconds Maximum)
  11. 5-12. ROTOR LIMITATIONS
    • [R] 90% Minimum Operation
    • [Y] 50 to 60% Accelerate through this range
    • [G] 90 to 107% Normal Operation
    • [R] 107% Maximum

    *Power on Transient Rotor Droop Limit is 95% (5 seconds Maximum)N2 75% to 88%, 60 seconds maximum (time is not cumulative)
  12. 5-12. POWER TURBINE (N2)
    • [R] 97% Minimum Operation
    • [G] 97 to 100% Continuous Operation
    • [R] 100% Maximum

    N2 75% to 88%, 60 Seconds Max (time not cumulative)
  13. 5-13. TORQUE
    • [G] 0 to 85% Continuous Operation
    • [Y] >85 to 100% Take-off Power Range (5 Minute Limit)
    • [R] 100% Maximum

    *Transient Torque Limit is 100 to 110% (5 second Maximum). INTENTIONALUSE IS PROHIBITED.
  14. 5-18. ALTITUDE LIMITATIONS

    -> 3000 Pounds GW and Below

    -> Above 3000 Pounds GW
    • a. 3,000 Pounds Gross Weight and Below:
    • Maximum operating- VFR 20,000 feet pressure altitude- IFR 14,000 feet pressure altitude

    • b. ABOVE 3,000 Pounds Gross Weight:
    • Maximum operating- VFR 13,500 feet pressure altitude- IFR 8,000 feet pressure altitude
  15. 5-21. WIND LIMITATIONS

    a. Starting
    b. Hovering with a crosswind
    c. Hovering with a tailwind
    • a. The helicopter can be started in a maximum wind velocity of 45 knots and a
    • maximum gust spread of 15 knots.NOTEGust spreads are not normally reported.
    • To obtain spread,compare minimum and maximum velocities.

    b. Maximum wind for hovering is 35 knots crosswind and 30 knots tailwind.

    • c. For hover operations at gross weights above 3200 pounds:
    • 1. IGE maneuvers – refer to Chapter 8
    • 2. OGE maneuvers – calm wind only
  16. 5-23. STANDBY GENERATOR LIMITS
    Prolonged operation of standby generator while it is the primary power supply to essential #1 buss is prohibited at airspeeds less than 50 KIAS to assist with generator cooling.
  17. 5-24. ENGINE ANTI-ICE
    a. Engine anti-ice shall not be used in ambient temperatures above 4 deg C.

    b. Engine anti-icing shall be ON for flight in visible moisture intemperature 4 deg C or below.
  18. 5-25. LOW INLET PRESSURE
    • CAUTION
    • Take off with LOW INLET PRESSURE caution light illuminated is prohibited
  19. 5-26. ENGINE STARTER LIMITS
    • a. If there is no rise in TOT within the first 20 seconds of energizing starter, limitstarter energizing time to the following:
    • External Power Battery
    • 25 Seconds – ON 40 Seconds – ON
    • 30 Seconds – OFF 60 Seconds – OFF
    • 25 Seconds – ON 40 Seconds – ON
    • 30 Seconds – OFF 60 Seconds – OFF
    • 25 Seconds – ON 40 Seconds – ON
    • 30 Minutes – OFF 30 Minutes – OFF

    • b. If there is a rise in TOT within the first 20 seconds of energizing starter, limitstarter energizing time to the following
    • :External/Battery Power
    • 1 Minute – ON
    • 1 Minute – OFF
    • 1 Minute – ON
    • 1 Minute – OFF
    • 1 Minute – ON
    • 30 Minutes - OFF
  20. 5-27. ENGINE STARTING LIMITS
    During starting if N1 does not reach 58% in a total time of 45 seconds (or 60 secondsbelow 10oC FAT), close throttle and press starter button until TOT is below 200oC. Ifengine fails to start on third attempt, abort start and make an entry on DA Form 2408-13-1. Starter engage time limits above do not apply to engine starting limitations shouldabort start procedures become necessary.
  21. 5-28. FUEL LIMITATIONS
    The HIT is the method by whitch the aviator in day-to-day flying monitors the aircraft engine condition

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