Term
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Definition
POWER ON
TRANSIENT 101% - 107%
CONTINUOUS 95% - 101%
TRANSIENT 91% - 95%
POWER OFF (AUTOROTATION)
MAXIMUM 110%
TRANSIENT 105% - 110%
NORMAL 90% - 105%
MAIN ROTOR OVERSPEED
127% / 137% / 142% |
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Term
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Definition
12 SECOND TRANSIENT 105% - 107%
TRANSIENT 101% - 105%
CONTINUOUS 95% - 101%
TRANSIENT 91% - 95%
AVOID OPERATIONS IN 20% - 40% AND 60% - 90% RANGE EXCEPT DURING START AND SHUTDOWN. |
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Term
FUEL QUANTITY
UH-60L H-60A+ |
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Definition
NORMAL 200 - 1500 LBS
PRECAUTIONARY 0 - 200 LBS |
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Term
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Definition
MAXIMUM 193 KNOTS
REFER TO SECTION V FOR ADDITIONAL AIRSPEED LIMITS |
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Term
ENGINE Ng
700 701C 701D/CC |
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Definition
12 SECOND TRANSIENT 102% - 105%
30 MINUTE LIMIT 99% - 102%
CONTINUOUS 0% - 99% |
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Term
ENGINE OIL TEMPERATURE
701C 701D/CC |
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Definition
30 MINUTE LIMIT 135 - 150 DEG C
CONTINUOUS -50 - 135 DEG C |
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Term
ENGINE OIL PRESSURE
701C 701D/CC |
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Definition
5 MINUTE LIMIT 100 - 120 PSI
NORMAL 26 - 100 PSI
IDLE AND TRANSIENT 22 - 26 PSI
*35 PSI MINIMUM AT 90% Ng AND ABOVE |
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Term
TURBINE GAS TEMPERATURE
701C 701D/CC |
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Definition
12 SECOND TRANSIENT 903 - 949 DEG C
2.5 MINUTE LIMIT 878 - 903 DEG C
START ABORT LIMIT 851 DEG C
10 MINUTE LIMIT 851 - 878 DEG C
30 MINUTE LIMIT 810 - 851 DEG C
NORMAL 0 - 810 DEG C |
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Term
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Definition
10 SECOND TRANSIENT
DUAL ENGINE
ABOVE 80 KIAS 100% - 144%
80 KIAS OR BELOW 120% - 144%
SINGLE ENGINE 135% - 144%
CONTINUOUS
DUAL ENGINE
ABOVE 80 KIAS 0% - 100%
80 KIAS OR BELOW 0% - 120%
SINGLE ENGINE 0% - 135% |
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Term
MAIN TRANSMISSION OIL TEMPERATURE
UH-60L HH-60L |
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Definition
PRECAUTIONARY 105 - 140 DEG C
CONTINUOUS -50 - 105 DEG C |
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Term
MAIN TRANSMISSION OIL PRESSURE
UH-60L HH-60L |
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Definition
PRECAUTIONARY 65 - 130 PSI
CONTINUOUS 30 - 65 PSI
IDLE AND TRANSIENT 20 - 30 PSI |
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Term
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Definition
| IT IS NOT ABNORMAL TO OVSERVE A % RPM 1 AND 2 SPEED SPLIT DURING AUTOROTATIONAL DESCENT WHEN THE ENGINES ARE FULLY DECOUPLED FROM THE MAIN ROTOR. A SPEED INCREASE OF ONE ENGINE FROM 100% REFERENCE TO 103% MAXIMUM CAN BE EXPECTED. DURING POWER RECOVER, IT IS NORMAL FOR THE ENGINE OPERATING ABOVE 100% RPM TO LEAD THE OTHER ENGINE. |
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Term
| ROTOR START AND STOP LIMITS |
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Definition
| MAXIMUM WIND VELOCITY FOR ROTOR START AND STOP IS 45 KNOTS FROM ANY DIRECTION. |
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Term
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Definition
| POWER-OFF (AUTOROTATION) ROTOR SPEEDS UP TO 120% RPM R ARE AUTHORIZED FOR USE BY MAINTENANCE TEST FIGHT PILOTS DURING AUTOROTATIONAL RPM CHECKS. |
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Term
| MAIN TRANSMISSION MODULE LIMITATIONS |
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Definition
| OIL PRESSURE SHOULD REMAIN STEADY AND SHOULD BE IN THE 45 - 60 PSI RANGE FOR THE UH-60L, TO ENSURE THAT WHEN FLUCTUATIONS OCCUR, THEY REMAIN IN THE ACCEPTABLE RANGE AS DEFINED ABOVE. 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 AND ENTRY ON DA FORM 2408-13-1. |
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Term
| MAIN TRANSMISSION MODULE LIMITATIONS |
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Definition
| 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. |
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Term
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Definition
| TRANSIENT % RPM 1 OR 2 OPERATION IN YELLOW RANGE (101% - 105%) IS NOT RECOMMENDED AS GOOD OPERATING PRACTICE. HOWEVER, NO DAMAGE TO EITHER ENGINE OR DRIVE TRAIN IS INCURRED BY OPERATION WITHIN THIS RANGE. MOMENTARY TRANSIENTS ABOVE 107% RPM 1 OR 2 ARE AUTHORIZED FOR USE BY MAINTENANCE TEST PILOTS DURING AUTOROTATIONAL RPM CHECKS. |
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Term
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Definition
| AT LEAST 60 SECONDS BETWEEN START CYCLES. A STARTING CYCLE IS THE INTERVAL FROM START INITIATION AND ACCELERATION OF THE COMPRESSOR, FROM ZERO RPM, TO STARTER DROPOUT. THE 60 SECOND DELAY BETWEEN START ATTEMPTS APPLIES WHEN THE FIRST ATTEMPT IS ABORTED FOR ANY REASON, AND IT APPLIES REGARDLESS OF THE DURATION OF THE FIRST ATTEMPT. IF MOTORING IS REQUIRED FOR AN EMERGENCY, THE 60 SECOND DELAY DOES NOT APPLY. |
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Term
ENGINE STARTER LIMITS
CONSECUTIVE STARTS |
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Definition
AMBIENT TEMP. 15 DEG C AND BELOW
2 CONSECUTIVE STARTS, FOLLOWED BY 3 MINUTE REST PERIOD, FOLLOWED BY 2 ADDITIONAL STARTS. A 30 MINUTE REST PERIOD IS THEN REQUIRED.
AMBIENT TEMP. 15 DEG C UP TO 52 DEG C
2 CONSECUTIVE STARTS FOLLOWED BY A 30 MINUTE REST PERIOD. |
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