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UH-60M > Limits > Flashcards

Limits Flashcards

1
Q

Engine (% RPM)

NP1 & NP2

A

AVOID
(except during start and shutdown):
20 - 40
60 - 90

Transient (Low): 91 - 95
Continuous: 95 - 101
Transient (High): 101 - 105
Transient (12 Sec): 105 - 107 (114 for MTF Autorotation)

EICAS:
Red Lower Limit Line: 91
Yellow Min Cont Limit Line: 95
Yellow Max Cont Limit Line: 101
Red Upper Limit Line: 105

PFD Power Pod:
Green: 100

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2
Q

Main Rotor

NR POWER ON

NR POWER OFF (AUTOROTATION)

A

Power On:
Transient (Low): 91 - 95
Continuous: 95 - 101
Transient (High): 101 - 107

Power Off:
Normal: 90 - 105
Transient: 105 - 110
Maximum: 110 (120 for MTF)
(Upper red range begins at 110% to correspond with the Power Off Limit)

EICAS:
Red Lower Limit Line: 91
Yellow Min Cont Limit Line: 95
Yellow Max Cont Limit Line: 101
Red Upper Limit Line: 110

PFD Power Pod:
Green: 100

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3
Q

NG (%)

A

Continuous: 0 - 105
Transient (12 Sec): 105 - 106

EICAS:
Yellow Max Cont Limit Line: 104.6
Red Upper Limit Line: 106

PFD Power Pod:
NG digital readout will appear when NG increases above 100

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4
Q

Torque - Q (%)

A

Dual Engine:

=< 80 KIAS:
Continuous: 0 - 120
Transient (10 Sec): 120 - 144

> 80 KIAS:
Continuous: 0 - 100
Transient (10 Sec): 100 - 144

Single Engine:

Continuous: 0 - 135
Transient (10 Sec): 135 - 144

EICAS:
Yellow Max Cont Limit Line: 100 or 120 (based on airspeed - >80KIAS = 100; 135 single engine)
Red Upper Danger Limit Line: 144

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5
Q

TGT (C)

A

START Abort Limit: 851
STOP max: 500

Continuous: 0 - 793
30 Min: 793 - 846
10 Min: 846 - 879
Transient (2.5 Min Cont): 879 - 903
Transient (12 Sec): 903 - 949

Cool down: 2 min NG <90%

EICAS:
Yellow Max Cont Limit Line: 793
Yellow Limit Line (30 Min): 846
Red Limit Line (10 Min): 879
Red Upper Limit Line (2.5 Min): 903

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6
Q

Engine Oil Pressure (PSI)

A

Idle: 22 - 26
Continuous: 26 - 100
5 Min: 100 - 120

EICAS:
Red Lower Danger Limit Line: 22
Yellow Min Cont Limit Line: 26
Yellow Max Cont Limit Line: 100
Red Upper Danger Limit Line: 120

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7
Q

Engine Oil Temperature (C)

A

Continuous: -20 - 135
30 Min: 135 - 150

EICAS:
Yellow Max Cont Limit Line: 135
Red Upper Danger Limit Line: 150

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8
Q

Transmission Oil Pressure (PSI)

A

Idle and Transient: 20 - 30
Continuous: 30 - 65
Precautionary: 65 - 130

Slopes:
>10 deg Nose Up: 30 - 35
>15 deg Nose Up: 10 - 15

EICAS:
Red Lower Danger Limit Line: 20
Yellow Min Cont Limit Line: 30
Yellow Max Cont Limit Line: 65
Red Upper Danger Limit Line: 130

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9
Q

Transmission Oil Temperature (C)

A

Continuous: -20 - 105
Precautionary: 105 - 140

EICAS:
Yellow Max Cont Limit Line: 105
Red Upper Danger Limit Line: 140

With Transmission oil temperature in Precautionary range, CAMM2 entry should be made except when hovering in adverse conditions.

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10
Q

Fuel Quantity (lb)

A

Precautionary: 0 - 200 (each tank)
Normal: >200 (each tank)

EICAS:
Low Fuel Caution Line: 200

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11
Q

Rotor Limits

A

Max wind for start/stop: 45 knots (from any direction)

Engine operation with gust lock engaged is prohibited. Gust lock engaged single-engine operation at IDLE for authorised pilot(s).

Min. rotor brake pressure for engine start is 450psi.
Max. rotor brake pressure for engine start is 690psi.

Use of the rotor brake with engine(s) operating is restricted to single and dual engine starts and operations at IDLE only. Not time limited.

Routine stops will be with engine(s) off, NR below 40% and with 150-180 psi applied to stop the rotor in not less than 12 seconds

Maximum rotor speed for emergency rotor brake application is 76% NR.
Rotor brake shall not be applied with engine(s) operating and rotor turning except during an emergency stop.

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12
Q

Main Transmission (Notes)

A

Oil pressure should remain steady during steady state forward flight or in level hover.

Range 45-60 psi, to ensure that when fluctuations occur, they remain in the acceptable range.

Fluctuations below 30psi (yellow range) are acceptable during transient manoeuvres (hovering in gusty winds conditions) or when flying pitch attitudes +6 degrees.

If oil pressure not steady during steady state forward flight, or level hover OR if steady but under 45psi make CAMM2 entry.
Sudden pressure drop (more than 10psi) without fluctuation require CAMM2 entry.

A demand for maximum power from engines with different engine torque factors (ETF) will cause a torque split when the low ETF engine reaches TGT limiting. This torque split is normal. Under these circumstances, the high power engine may exceed the dual engine limit. #1 Q = 96%, #2 Q = 104% (TOTAL = 200/2 = 100%).

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13
Q

Engine Power Limitations

A

Limitations are absolute limitations regardless of atmospheric conditions. For variations in power available with temperature and pressure altitude, refer TORQUE AVAILABLE charts.

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14
Q

Engine Starter Limits

A

Ambient temperature +15C and below:
Two consecutive start cycles.
3 min rest.
Two additional consecutive start cycles.
30 min rest (before any additional starts).

> +15C to +52C:
Two consecutive start cycles.
30 min rest (before any additional starts).

*60 Sec between all cycles.
- A cycle is from start initiation to starter drop out.
- 60 Sec delay applies when the first attempt is aborted for any reason, and applies regardless of the duration of the first attempt.
- If motoring for emergency, delay does not apply.

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15
Q

Pneumatic Source Inlet

A

Min ground: 40 psig and 30 ppm @ 149C
Max ground: 50 psig @ 249C

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16
Q

Engine Start Limits

A

Crossbleed starts shall not be attempted unless:

  • The anti-ice light is NOT illuminated,
  • Operating engine is at 90% NG or above, and
  • Rotor speed is at 100% NR.

When attempting single-engine starts at PA > 14,000ft, wait until max. motoring speed (about 24%) is reached before advancing the ENG POWER CONT lever to IDLE.

CAUTION:
Engine start attempts at or above a PA of 18,000 feet could result in a hot start.

17
Q

Fuel Limitations

A

Fuel boost pumps shall be on when:

  • Operating with JP-4 or equivalent,
  • At and above 5000 feet PA,
  • Operating in crossfeed with JP-4

Pressure Refuel:
- 300 gal/min @ 55 psi (1135 L)

Closed Circuit:
- 110 gal/min @ 15 psi (416 L)

18
Q

Weight(s)

A

Max Gross:

  • Clean: 22,000 lb
  • External Lift: 23,500 lb (above 22,000 lb can only be flown with cargo hook loads > 8,000 lb and up to 9,000 lb)
  • ESSS configuration: 24,500 lb (ferry flight only)

Cargo Hook Weight:
Max suspended weight - 9,000 lb

Rescue Hoist Weight:
Max suspended weight - 600 lb
When performing repetitive (more than one) hoists of 300 lb or more, a 30 Sec rest is required between hoists.

Internal Weight:
- 300 lb per square foot
- Floor tie-down fittings: Max - 5,000 lb
- Net restraint rings: 3,500 lb

Cabin ceiling tie-down:
- Tie Down: 4000 lb

Stowage:
125 lb each compartment

19
Q

Airspeed

A

Structural Vne - 193 KIAS (clean configuration, below 17,000 lbs).

Max airspeed with:
- Aircrewman window fully open - 170 KIAS (not open or closed > 120 KIAS)
- Cabin door fully open - 145 KIAS (not open or closed > 80 KIAS)
- Flight with Cockpit doors removed - Prohibited

20
Q

Airspeed - Extended

A

Max airspeed with:
- External Cargo Hook up to 8,000 lb - 140 KIAS
- External Cargo Hook > 8,000 lb and gross weight > 22,000 lb - variable but <= 120 KIAS
- External stores attached - 170 KIAS (configuration, below 20,000 lbs)
- OEI - 130 KIAS

Max airspeed for autorotation at the following gross weight:

  • =< 16,825 lbs: 150 KIAS
  • > 16,825 lbs: 130 KIAS.

Sideward/rearward flight into wind, when combined with windspeed shall not exceed 45 kts (35 kts with ESSS). Hovering in winds greater than 45 kts (35 kts with ESSS) from the sides or rear is prohibited.

Max airspeed for SAS(s) inoperative are:

  • One - 170 KIAS,
  • Two - 150 KIAS (in IMC - 140 KIAS)

Max airspeed for hydraulic pump(s) inoperative are:

  • One - 170 KIAS,
  • Two - 150 KIAS (in IMC - 140 KIAS)

Max airspeed for the positioning or adjustment of aircraft lights:

  • Landing Light:
    - Must be extended prior to reaching 130 KIAS.
    - When extended, airspeed limited to 180 KIAS.
  • Search Light:
    - Must be extended prior to reaching 100 KIAS.
    - When extended, airspeed limited to 180 KIAS.
21
Q

Airspeed - Stabilator

A

If the automatic stabilator control system fails in flight and automatic operation cannot be restored:

Manual Control Available:
- The stabilator shall be set full down at speeds below 40 KIAS,
- The stabilator shall be set at 0 at speeds above 40 KIAS, and
- Autorotation airspeed shall be limited to 120 KIAS at all gross weights.

Manual Control Not Available:
- Variable Vne indicated by extending the red arc in a counter-clockwise direction to the applicable airspeed for the current stabilator position. Pointer and readout turn red with a black outline when the airspeed is at or above the Vne.

22
Q

Manoeuvres

A

Prohibited:

  • Hovering turns greater than 30 deg/s,
  • Intentional manoeuvres beyond attitudes of +/- 30 deg pitch or over 60 deg roll (bank angle limited to 30 deg when PRI SERVO FAIL caution appears).
  • Simultaneous moving of both ENG PCLs to IDLE or OFF,
  • Rearward ground taxi,
  • Manoeuvring flight which results in severe blade stall and significant increase in 4-per-rev vibration
  • Intentional Flight into severe turbulence or thunderstorms.
  • Intentional flight into turbulence with a sling load and an inoperative collective trim.

Restricted:
- Manual Operation of the Stabilator,
- Downwind Hovering,
- Prolonged rearward flight.

Avoided:

  • > 80 KIAS, avoid abrupt, full pedal inputs.
23
Q

Manoeuvring with Sling/Rescue Hoist Load

A
  • Max AoB in forward flight - 30 deg,
  • Side flight limited by bank angle.
  • Rearward flight limited to - 35 kts.
  • Forward flight max for rescue hoist load - 100 KIAS.
  • Forward flight max for sling load >8,000 (AUW >22,000) - 120 KIAS.
  • Forward flight max for sling load =<8,000 lb - 140 KIAS.

RoD limited to 1000 fpm against rescue hoist.

24
Q

Landing Gear

A

Touchdown: 60 kts (ground speed on level terrain)

Do not exceed a touchdown sink rate of:

  • Below 16,825 lbs:
    - Level Terrain - 540 fpm,
    - Sloped Terrain - 360 fpm.
  • Above 16,825 lbs:
    - Level Terrain - 300 fpm,
    - Sloped Terrain - 180 fpm.
25
Q

Slope Landing

A

Apply regardless of gross weight, CoG, ESSS/EERFS:
- Nose, right or left wheel upslope: 15 deg (reduced by 2 deg for every 5 kts of wind)

  • Nose downslope: 6 deg.
  • Landing in downslope condition with tail winds greater than 15 kts shall not be conducted.
26
Q

Environmental Conditions - Icing

A

Ambient air temperature +4 deg, or below and visible liquid moisture is present.

Windshield Anti-ice check shall not be completed when FAT is > 27 C.

Liquid water content (LWC):
Trace - LWC 0 - 0.25 g/m3
Light - LWC 0.25 - 0.5 g/m3
Moderate - LWC 0.5 - 1.0 g/m3
Heavy - LWC greater than 1.0 g/m3

To fly into Trace Requires:
- Pitot Heat
- Windshield Anti-ice
- Engine Anti-ice
- Engine inlet Anti-ice Modulating Valve
- Insulated Ambient Air Sensing Tube

Moderate:
- As per Trace with addition of Blade De-ice (Light, recommended Blade De-ice).

Heavy or Severe:
- Prohibited

Engine and Engine Inlet Anti-Ice Limitation:
Avoid ops under low power:
- RoD >1,900 fpm, or
- Ground bleed air HEATER ops <100% NR

If Torque is at 10% or below per engine, full anti-ice cannot be provided.

27
Q

Backup HYD Pump

A

-54 - 32:
- Operating time: Unlimited
- Cool Down (Pump Off): N/A

33 - 38:
- Operating time: 24 min
- Cool Down (Pump Off): 72 min

39 - 52:
- Operating time: 16 min
- Cool Down (Pump Off): 48 min

28
Q

APU Operations

A

To prevent APU overheating, APU operating limits are:

With engine and rotor operating:
- 30 min at ambient temperature of +43 C and above.

With engine and rotor not operating:
- Continuous to an ambient temperature of +51 C.

If APU OIL HOT caution appears a 30 min cooling period is required, before checking oil level.

29
Q

ESSS Jettison Envelope

A

Level flight:
- 0 - 120KIAS
- Balance equal to or less than 1 skidball

Descent:
- 80 -120 (Recommended)
RoD (80 kts): 1000 fpm
RoD (120 kts): 500 fpm

30
Q

Minimum Crew Requirements

A

Two Pilots

31
Q

Blue Force Tracker (BFT)

A

Normal Operating Range:
- -26C to +71C.

UH-60M (3 decks)

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