UH-60M - Ops Limits (Ch. 5)

Question 1

MAIN TRANSMISSION MODULE LIMITATIONS

If oil pressure is not steady during steady state forward flight or in a level hover, or if oil pressure is steady but under __ psi, make an entry on DA Form 2408-13-1. Sudden pressure drop (more than __ psi) without fluctuation requires an entry on DA Form 2408-13-1.

Answer 1

If oil pressure is not steady during steady state forward flight or in a level hover, or if oil pressure is steady but under 45 psi, make an entry on DA Form 2408-13-1. Sudden pressure drop (more than 10 psi) without fluctuation requires an entry on DA Form 2408-13-1.

Question 2

GAS TURBIN TEMPERATURE

__ Sec. Transient ____________
__ Min. Transient (cont. pwr) ____
__ Min. Limit ______________
__ Min. Limit ______________
Normal ___________________

Start abort limit ______________

Answer 2

12 Sec Trans. 903 - 949°C

4. 2.5 Min Trans. 879 - 903°C
5. 10 Min. Limit 846 - 879°C
6. 30 Min. Limit 793 - 846°C
7. Normal 0 - 793°C

Start abort Limit 851°C

Question 3

TRANSMSN OIL TEMPERATURE

Precautionary ____________
Continuous ____________

Answer 3

2. Precautionary 105 − 140°C
3. Continuous −20 − 105°C

Question 4

TRANSMISSION OIL PRESSURE

Precautionary _____________
Continuouse ______________
Idle and Transient ___________

Answer 4

3. Precautionary 65-130 PSI
4. Continuouse 30-65 PSI
   ​1. Idle and Transient 20-30 PSI

Question 5

TORQUE % Q

___-Second Transient
Dual-Engine
Above __ KIAS __________
__ KIAS or Below ___________
Single-Engine ____________

Continuous
Single-Engine _____________
Dual-Engine
Above __ KIAS ____________
__ KIAS or Below ___________

Answer 5

TORQUE % Q

10 -Second Transient
Dual-Engine
Above 80 KIAS 100% − 144% (4)
80 KIAS or Below 120% − 144%
Single-Engine 135% − 144%

Continuous
Single-Engine 0% − 135% (3)
Dual-Engine
Above 80 KIAS 0% − 100% (1)
80 KIAS or Below 0% − 120% (2)

Question 6

ENGINE OIL TEMPERATURE​

__ Min Limit _____________

Continuous _____________

Answer 6

ENGINE OIL TEMPERATURE​

30 Min Limit 135 - 150°C
Continuous -20 - 135°C

Question 7

ENGINE OIL PRESSURE

__ Min Limit _______________
Normal Operation ______________ PSI
Idle ______________________ PSI

Answer 7

3. 5 Min Limit 100 − 120 PSI
4. Normal Operation 26 − 100 PSI
5. Idle 22 − 26 PSI

Question 8

ENGINE Ng

___ Sec. Transient __________
Continuous ______________

Answer 8

ENGINE Ng

2. 12 Sec. Transient 105% − 106%
3. Continuous 0 − 105%

Question 9

ENGINE NP 1−2

__ Sec. Transient ____________
Transient _________________
Continuous _______________
Transient _________________

Avoid Operation in the _____ − _____ and _____ − _____ range except during start and shutdown

Answer 9

ENGINE NP 1−2

12 Sec. Transient 105% − 107%

3. Transient 101% − 105%
4. Continuous 95% − 101%
5. Transient 91% − 95%

• *Avoid Operation in the 20% − 40% and**
• *60% − 90% range except during start and shutdown**

Question 10

MAIN ROTOR % RPM

Power on
Transient _____________
Continuous ___________
Transient ____________

Power off (Autorotation)
Maximum ______________
Transient ____________
Normal _______________

Answer 10

• *Power on**
  3. Transient 101% − 107%
  2. Continuous 95% − 101%
  1. Transient 91% − 95%

Power off (Autorotation)
Maximum 110%
Transient 105% − 110%
Normal 90% − 105%

Question 11

FUEL QUANTITY

Normal ______________
Precautionary _____________

Answer 11

FUEL QUANTITY

1. Normal > 200 (EACH TANK)
2. Precautionary 0 − 200 (EACH TANK)

Question 12

ENGINE START LIMITS

Cross bleed starts shall not be attempted unless the __________________________advisory does not appear, and operating engine must be at __% NG or above and rotor speed at ___% NR.

Answer 12

Crossbleed starts shall not be attempted unless the ENG 1 ANTI-ICE ON or ENG 2 ANTI-ICE ON advisory does not appear, and operating engine must be at 90% NG or above and rotor speed at 100% NR. When attempting single-engine starts at pressure altitudes above 14,000 feet, press the start switch with the ENG POWER CONT lever OFF, until the maximum motoring speed (about 24%) is reached, before going to IDLE.

Question 13

ENGINE STARTER LIMITS

At ambient temperatures of _\_°C and below, __\_ consecutive start cycles may be made, followed by a _\_minute rest period, followed by __\_ additional start cycles. A __ minute rest period is then required before any additional start cycles.

At ambient temperatures above _\_° up to __°C, __\_ consecutive start cycles may be made. A __ minute rest period is then required before any additional start cycles.

Answer 13

At ambient temperatures of 15°C and below, two consecutive start cycles may be made, followed by a 3 minute rest period, followed by two additional start cycles. A 30 minute rest period is then required before any additional start cycles.
At ambient temperatures above 15° up to 52°C, two consecutive start cycles may be made. A 30 minute rest period is then required before any additional start cycles.

Question 14

PNEUMATIC SOURCE INLET LIMITS. ​

The minimum air source required to start the helicopter engines is __ psig and __ ppm at ___°C.

The maximum is __ psig at ___°C.

Answer 14

The minimum air source required to start the helicopter engines is 40 psig and 30 ppm at 149°C.

The maximum is 50 psig at 249°C, measured at the external air connector on the fuselage.

Question 15

AIRSPEED LIMITS

Maximum airspeed for one engine inoperative is __ KIAS.
Maximum airspeed for autorotation at a gross weight of 16,825 lbs or less is __ KIAS.
Maximum airspeed for autorotation at a gross more than 16,825 lbs is __ KIAS.
Sideward/rearward flight into the wind, when combined with wind speed, shall not exceed ___ KTS.

Answer 15

Maximum airspeed for one engine inoperative is 130 KIAS.
Maximum airspeed for autorotation at a gross weight of 16,825 lbs or less is 150 KIAS.
Maximum airspeed for autorotation at a gross more than 16,825 lbs is 130 KIAS.
Sideward/rearward flight into the wind, when combined with wind speed, shall not exceed 45 KTS (35 knots with external fuel tanks).

Question 16

ENGINE OVERSPEED CHECK LIMITATIONS

Engine overspeed check in flight is ________. Engine overspeed checks, on the ground, are authorized by _________________________ only.

Answer 16

Engine overspeed check in flight is prohibited. Engine overspeed checks, on the ground, are authorized by designated maintenance personnel only.

Question 17

LOADING LIMITS

Maximum capacity for each storage compartment is ____ pounds.
Maximum cargo hook capacity (UH-60M) _____ pounds.
Maximum weight is further limited by cargo floor maximum capacity of __\_ lbs per square foot.
Max weight UH60 with seven lugs wheels _____\_ pounds.

Answer 17

Maximum capacity for each storage compartment is 125 pounds.
Maximum cargo hook capacity (UH-60M) 9.000 pounds.
Maximum weight is further limited by cargo floor maximum capacity of 300 lbs per square foot.
Max weight UH60 with seven lugs wheels 20,500 pounds.

Fourteen-lug wheels shall be used at or above gross weights of 20,500 pounds.
UH-60M 22,000
UH-60M external lift mission 23,500
Ferry (Airworthiness release) 24.500
External lift missions above 22,000 pounds can only be flown with cargo hook loads above 8,000 pounds and up to 9,000 pounds - max 120 KIAS

The four cabin ceiling tiedown fittings have a limited load capability of 4,000 pounds.

The maximum weight that may be suspended from the rescue hoist is 600 pounds.

Question 18

SAS Inoperative Limits KIAS

One SAS _________
Two SAS _________
Two SAS & IMC _____

Answer 18

One SAS 170 KIAS
Two SAS 150 KIAS
Two SAS & IMC 140 KIAS

Question 19

Hydraulic System Inoperative Limits

One hydraulic system _________
Two hydraulic systems _________
Two hydraulic systems & IMC ________

Answer 19

One hydraulic system 170 KIAS
Two hydraulic systems 150 KIAS
Two hydraulic systems & IMC 140 KIAS

Question 20

Searchlight and Landing Light

Maximum airspeed for Extending KIAS
Landing Light __________
Searchlight __________

Maximum airspeed for Extended KIAS
Landing Light __________
Searchlight __________

Answer 20

Maximum airspeed for Extending KIAS
Landing Light 130
Searchlight 100

Maximum airspeed for Extended KIAS
Landing Light 180
Searchlight 180

Max autorotation A/S Volcano installed 100 KIAS
Max airspeed with skis installed 155 KIAS
Vne EIBF installed 184 KIAS, and
external tanks installed 162 KIAS

Question 21

BACKUP HYDRAULIC PUMP HOT WEATHER LIMITATIONS with the rotor system ________

FAT Degree C Operating Time Cool down Time

__________ __________ __________
__________ __________ __________
__________ __________ __________

Answer 21

BACKUP HYDRAULIC PUMP HOT WEATHER LIMITATIONS with the rotor system static.

FAT _°_C Oprerating T. Cool down Time

-54°-32°C__Unlimited - - - -
33°-38°C__24__72
39°-52°C__16__48

During prolonged ground operation of the backup pump using MIL-H-83282 or MIL-H-5606 with the rotor system static, the backup pump is limited to the following temperature/time/cooldown limits because of hydraulic fluid overheating.

Question 22

FLIGHT WITH CABIN DOOR(S)/WINDOW(S) OPEN

Cabin doors
Cabin doors may be fully open up to ___ KIAS with soundproofing installed aft of station 379.
Cabin doors may be fully open up to ___ KIAS with soundproofing removed aft of station 379 or with soundproofing secured properly.

Windows
Gunner’s window(s) may be fully open up to ___ KIAS
Cockpit doors sliding windows will not be _____ or _____ during flight except during _____.
Flight with cockpit door(s) removed is ________.

Answer 22

Cabin doors
Cabin doors may be fully open up to 100 KIAS with soundproofing installed aft of station 379.
Cabin doors may be fully open up to 145 KIAS with soundproofing removed aft of station 379 or with soundproofing secured properly.

Windows
Gunner’s window(s) may be fully open up to 170 KIAS
Cockpit doors sliding windows will not be opened or closed during flight except during hover.
Flight with cockpit door(s) removed is prohibited.

Flight with cabin door(s) open is not authorized with Volcano installed.

BAM window(s) shall not be transitioned open or closed above 120 KIAS.

Question 23

AIRSPEED LIMITATIONS FOLLOWING FAILURE OF THE AUTOMATIC STABILATOR CNTR SYSTEM

Manual control is available:
Stabilator shall be full down at speeds below __ KIAS
Stabilator shall be set at zero degree for speeds above __ KIAS.
Autorotation airspeed shall be limited to __ KIAS at all gross weights.

Manual control not available:
Placard airspeed limits shall be observed as not-to-exceed speed (powered flight and autorotation), except in no case shall the autorotation limit exceed ___ KIAS.

Answer 23

Manual control is available:
Stabilator shall be full down at speeds below 40 KIAS
Stabilator shall be set at zero degree for speeds above 40 KIAS.
Autorotation airspeed shall be limited to 120 KIAS at all gross weights.

Manual control not available:
Placard airspeed limits shall be observed as not-to-exceed speed (powered flight and autorotation), except in no case shall the autorotation limit exceed 120 KIAS.

Question 24

PROHIBITED MANEUVERS

a. Hovering turns greater than __° per second are prohibited. Intentional maneuvers beyond attitudes of __° in pitch or over __° in roll are prohibited.
b. Simultaneous moving of ___________________ to ____ or ___ in flight is prohibited.
c. ________ ground taxi is prohibited.

Answer 24

a. Hovering turns greater than 30° per second are prohibited. Intentional maneuvers beyond attitudes of 30° in pitch or over 60° roll are prohibited.
b. Simultaneous moving of both ENG POWER CONT (EPC) levers to IDLE or OFF in flight is prohibited.
c. Rearward ground taxi is prohibited.

Question 25

**RESTRICTED MANEUVERS** ## Footnote Manual operation of the stabilator in flight is \_\_\_\_\_\_, except as required by formal training and \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_requirements or as alternate stabilator control in case the AUTO mode malfunctions. Prolonged rearward flight and downwind hovering are to be avoided to prevent accumulation of ___________ in the helicopter and __________ to windows on \_\_\_\_\_\_\_\_\_\_\_\_\_\_.

Answer 25

Manual operation of the stabilator in flight is _prohibited_, except as required by formal training and _maintenance test flight_ requirements or as alternate stabilator control in case the AUTO mode malfunctions. Prolonged rearward flight and downwind hovering are to be avoided to prevent accumulation of _exhaust fumes_ in the helicopter and _heat damage_ to windows on _open cargo doors_.

Question 26

**High-Speed Yaw Maneuver Limitation** Above __ KIAS avoid _____________ to prevent excess tail rotor system loading.

Answer 26

**High-Speed Yaw Maneuver Limitation** Above _80_ KIAS avoid _abrupt, full pedal inputs_ to prevent excess tail rotor system loading.

Question 27

**Bank Angle Limitation** ## Footnote Bank angles shall be limited to \_\_° when either PRI SERVO PRESS caution appears.

Answer 27

Bank angles shall be limited to _30_° when either PRI SERVO PRESS caution appears.

Question 28

**LANDING GEAR LIMITATIONS** ## Footnote **Do not exceed a touchdown sink rate (feet-per-minute) of:** ​Gross weight Level Terrain Slopes Blw 16,825 lb _____ \_\_\_\_ Abv 16,825 lb _____ \_\_\_\_

Answer 28

**Do not exceed a touchdown sink rate (feet-per-minute) of:** Gross weight Level Terrain Slopes Blw 16,825 lb 540 360 Abv 16,825 lb 300 180

Question 29

**LANDING SPEED LIMITATIONS** ## Footnote Maximum forward touchdown speed is limited to __ knots ground speed on level terrain.

Answer 29

Maximum forward touchdown speed is limited to 60 knots ground speed on level terrain.

Question 30

**SLOPE LANDING LIMITATIONS** ## Footnote \_\_° nose-up, right wheel up or left wheel upslope. The slope limitations shall be further reduced by \_° for every _ knots of wind. \_\_° nose downslope. Landing in downslope conditions with tail winds greater than __ knots shall not be conducted. The main gearbox may be operated up to __ minutes at a time with pressure fluctuations when the helicopter is known to be at a \_\_\_\_\_\_\_\_\_\_\_\_

Answer 30

_15_° nose-up, right wheel up or left wheel upslope. The slope limitations shall be further reduced by _2_° for every _5_ knots of wind. _6_° nose downslope. Landing in downslope conditions with tail winds greater than _15_ knots shall not be conducted. The main gearbox may be operated up to _30_ minutes at a time with pressure fluctuations when the helicopter is known to be at a _nose-up attitude_ (i.e., slope landings or hover with extreme aft CG). -------------------------------------- When attempting a nose upslope landing at gross weights in excess of 16,000 pounds with skis installed, the parking brake may not hold the helicopter in position. The pilot should be prepared to use the toe brakes. Slope landings with skis installed are limited to 10° nose-up and right wheel or left wheel upslope. The slope limitation shall be further reduced by 2° for every 5 knots of wind above 12 knots. CAUTION - When performing slope landings with external fuel tanks, ensure tank to ground clearance.

Question 31

**FLIGHT IN ICING CONDITIONS** Helicopters with the following equipment installed, operational, and turned on are permitted to fly into ____ or _____ icing conditions. 1. \_\_\_\_\_\_\_\_\_\_\_\_\_ 2. \_\_\_\_\_\_\_\_\_\_\_\_\_ 3. \_\_\_\_\_\_\_\_\_\_\_\_\_ 4. \_\_\_\_\_\_\_\_\_\_\_\_\_ 5. \_\_\_\_\_\_\_\_\_\_\_\_\_ Flight into moderate icing conditions, ___________________________ must be installed, operational, and turned on. Flight into heavy or severe icing is \_\_\_\_\_\_\_\_\_.

Answer 31

Helicopters with the following equipment installed, operational, and turned on are permitted to fly into _trace_ or _light icing_ conditions. 1. Windshield Anti-ice. 2. Pitot Heat. 3. Engine Anti-ice. 4. Engine Inlet Anti-ice Modulating Valve. 5. Insulated Ambient Air Sensing Tube. Flight into moderate icing conditions, _all equipment in paragraph 5.28 b. and blade deice kit_ must be installed, operational, and turned on. Flight into heavy or severe icing is _prohibited_. --------------------------------- Helicopters equipped with blade erosion kit tape are prohibited from flight into icing conditions. Flight into known or forecast icing conditions with EIBF installed is prohibited. NOTE - The ice detecting system is calibrated for 100 KIAS. When flying at airspeeds above 100 KIAS, the ice rate meter will indicate higher LWC than the actual conditions.

Question 32

**ROTOR START AND STOP LIMITS** ## Footnote Maximum wind velocity for rotor start and stop is __ KTS from any direction.

Answer 32

Maximum wind velocity for rotor start and stop is _45_ KTS from any direction.

Question 33

**MANEUVERING LIMITATIONS** ## Footnote NOTE - Maneuvers entered from a low power setting may result in ___________ of \_\_\_% RPM R or greater.

Answer 33

NOTE - Maneuvers entered from a low power setting may result in _transient droop_ of _5_ % RPM R or greater.

Question 34

**APU OPERATION LIMITS** ## Footnote To prevent APU overheating, APU operation at ambient temperature of _\_\__°C and above with engine and rotor operating is limited to _\_\__ minutes. With engine and rotor not operating, the APU may be operated _\_\_\_\_\_\_\_\_\_\_\__up to an ambient temperature of _\_\__°C.

Answer 34

To prevent APU overheating, APU operation at ambient temperature of _43_°C and above with engine and rotor operating is limited to _30_ minutes. With engine and rotor not operating, the APU may be operated _continuously_ up to an ambient temperature of _51_°C.

Question 35

**WINDSHIELD ANTI-ICE LIMITATIONS** ## Footnote Windshield anti-ice check shall not be done when FAT is over _\_\__°C.

Answer 35

Windshield anti-ice check shall not be done when FAT is over _27_°C.

Question 36

**TURBULENCE AND THUNDERSTORM OPERATION** ## Footnote Intentional flight into thunderstorms is _\_\_\_\_\_\_\_\__. Intentional flight into _\_\_\_\_\__ turbulence is prohibited. Intentional flight into turbulence with a sling load attached and an inoperative _\_\_\_\_\_\_\_\_\_\_\_\_\_\_\__ is prohibited.

Answer 36

Intentional flight into thunderstorms is _prohibited_. Intentional flight into _severe_ turbulence is prohibited. Intentional flight into turbulence with a sling load attached and an inoperative _collective pitch control friction_ is prohibited.

Question 37

**Limitations for Maneuvering With Sling Loads** Maneuvering limitations with a sling load are limited to a maximum of \_\_° angle of bank in forward flight. Side flight is limited by ________ and is decreased as \_\_\_\_\_\_\_\_\_\_. Rearward flight with sling load is limited to __ knots.

Answer 37

**Limitations for Maneuvering With Sling Loads** Maneuvering limitations with a sling load are limited to a maximum of _30°_ angle of bank in forward flight. Side flight is limited by _bank angle_ and is decreased as _airspeed increases_. Rearward flight with sling load is limited to _35_ knots.

Question 38

**ROTOR BRAKE/GUST LOCK LIMITATIONS** ## Footnote Operating an engine against the gust lock is \_\_\_\_\_\_\_. Rotor brake shall not be applied with engine(s) operating and rotor turning except during an emergency stop. Maximum rotor speed for emergency rotor brake applications is \_\_% NR. Routine stops will be with engine(s) off, NR below \_\_% and with ____ psi applied to stop the rotor in not less than __ seconds. Minimum rotor brake pressure for engine start is ___ psi. Maximum rotor brake pressure for engine start is ___ psi. Use of the rotor brake with engine(s) operating is restricted to ___ and ___ engine starts and operations at ____ only. Single and dual engine starts and operation at ____ with rotor brake on are not time limited.

Answer 38

Operating an engine against the gust lock is prohibited. Rotor brake shall not be applied with engine(s) operating and rotor turning except during an emergency stop. Maximum rotor speed for emergency rotor brake ap- plications is 76% NR. 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. Minimum rotor brake pressure for engine start is 450 psi. Maximum rotor brake pressure for engine start is 690 psi. Use of the rotor brake with engine(s) operating is restricted to _single_ and _dual_ engine starts and operations at IDLE only. Single and dual engine starts and operation at IDLE with rotor brake on are not time limited.

Question 39

**TORQUE-Q** ## Footnote **10 SECOND TRANSIENT** Dual-Engine Above 80 KIAS \_\_\_\_\_\_\_-\_\_\_\_\_\_% 80 KIAS or below \_\_\_\_\_\_\_-\_\_\_\_\_\_% Single-Engine \_\_\_\_\_\_\_-\_\_\_\_\_\_% **CONTINUOUS** Dual-Engine Above 80 KIAS \_\_\_\_\_\_\_-\_\_\_\_\_\_% 80 KIAS or below \_\_\_\_\_\_\_-\_\_\_\_\_\_% Single-Engine \_\_\_\_\_\_\_-\_\_\_\_\_\_%

Answer 39

**10 SECOND TRANSIENT** Dual-Engine Above 80 KIAS 100-144% 4 80 KIAS or below 120-144% Single-Engine 135-144% **CONTINUOUS** Dual-Engine Above 80 KIAS 0-100% 1 80 KIAS or below 0-120% 2 Single-Engine 0-135% 3

Question 40

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Question 41

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Question 42

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Question 43

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Question 44

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Question 45

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Question 47

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