Limits Flashcards
MINIMUM CREW REQUIREMENTS
The minimum crew consists of one pilot qualified in the AH-1Z helicopter. Solo flights are conducted from the aft
pilot station only.
APU LIMITATIONS
APU starts (with battery only) shall not be performed at temperatures below –25 °F (-32 °C). Below –25 °F (–32 °C), an external power cart shall be used, or if no power cart is available, battery should be maintained or stored at temperatures above 0 °F.
Ground power cart requirements for APU start is 500 amperes with an ampere range of 300 to 1,000 (min/max).
Voltage requirement is 28 Vdc with a voltage range of 23.9 to 29.1 Vdc.
APU is not intended for operation in flight and shall be turned OFF prior to takeoff.
APU Starter Limits
30 seconds ON. 60 seconds OFF. 30 seconds ON. 60 seconds OFF. 30 seconds ON. 30 minutes OFF.
Engine Starter Limits
Less than 61 °F (16 °C) First Cycle 60 seconds Second Cycle 60 seconds Third Cycle 60 seconds Fourth Cycle 30 minutes
61° to 126 °F (16° to 52 °C)
First Cycle 60 seconds
Second Cycle 30 minutes
Engine Wash Starter Limits
STARTER ON-DELAY BTWN CYCLES
2 minutes 5 minutes
2 minutes 30 minutes
Hot Start
The maximum MGT during starting shall not exceed 867 ºC before starter cutout
Engine Start Abort Criteria
- Ng fails to reach 14 percent within 6 seconds.
- No MGT indication within 20 seconds after initial indication of Ng.
- No oil pressure within 30 seconds after starter is engaged. Do not motor engine if aborting due to lack of
oil pressure. - MGT reaches 867 °C before starter disengages.
- Starter fails to disengage above 55 ±3 percent Ng.
- No Np indication within 30 seconds after Ng reaches idle (67 ±3 percent).
- ROTOR BRAKE light fails to extinguish 30 seconds after brake release.
MAIN ROTOR LIMITS
POWER ON
91% TRANSIENT OPERATION
97-104.9% CONTINUOUS OPERATION
104.9 MAXIMUM
POWER OFF
84% TRANSIENT OPERATION (1G)
91-110.9% CONTINUOUS OPERATION
110.9% MAXIMUM
POWER TURBINE NP
99-101.7% CONTINUOUS OPERATION
101.8-116.9% TRANSIENT OPERATION (12 SEC)
116.9% MAXIMUM
55-70% AVOID
ENGINE TORQUE
T700 GE-401
0-62.4% CONTINUOUS OPERATION
62.4-65.7% TRANSIENT OPERATION (30 MIN)
65.7% MAXIMUM
T700 GE-401C
0-65.7% CONTINUOUS
65.7% MAXIMUM
MRGB TORQUE
0-104.9% CONTINUOUS
105-110.9% TRANSIENT OPERATION (10 SEC)
MGT LIMITS
NORMAL OPERATION
400-800 DEG C CONTINUOUS OPERATION
801-867 DEG C INTERMEDIATE (30 MIN)
ONE ENGINE INOP
867-917 DEG C CONTINGENCY PWR (2.5 MIN)
917-964 DEG C TRANSIENT OPER (12 SEC)
STARTING
867 DEG C MAXIMUM
NG LIMITS
0-102.1% CONTINUOUS OPERATION
- 1-105.1% TRANSIENT (12 SEC)
- 2% MAXIMUM
ENGINE OIL TEMP/PRESS
TEMP
35-131 DEG C CONTINUOUS OPERATION
132-149 DEG C 30 MINUTE OPERATION
150 DEG C MAXIMUM
PRESS 20 PSI MINIMUM 20-30 PSI CAUTION 30-100 PSI CONTINUOUS OPERATION 100 PSI MAXIMUM 200 PSI COLD START LIMIT
MRGB OIL TEMP/PRESS
TEMP -50 TO 0 DEG CAUTION 0-100 DEG NORMAL 100-110 DEG CAUTION 110 DEG MAXIMUM
PRESS 25 PSI MINIMUM 25-40 PSI CAUTION 40-70 PSI NORMAL 70-100 PSI CAUTION 100 PSI MAXIMUM
IGB OIL TEMP/PRESS
TEMP
-50 TO 0 DEG CAUTION
0-124 DEG NORMAL
129 DEG MAXIMUM
PRESS
LO LOW
GO NORMAL (>7 PSI)
CBOX OIL TEMP/PRESS
TEMP -50 TO 0 DEG CAUTION 0-100 DEG NORMAL 100-110 DEG CAUTION 110 DEG MAXIMUM
PRESS 25 PSI MINIMUM 25-70 PSI CAUTION 70-90 PSI NORMAL 90-150 PSI CAUTION 151 PSI MAXIMUM
TRGB OIL TEMP/PRESS
TEMP -50 TO 0 DEG CAUTION 0-100 DEG NORMAL 100-110 DEG CAUTION 110 DEG MAXIMUM
PRESS LO MINIMUM (175 PSI)
HYDRAULICS
TEMP -7 DEG MINIMUM -7 TO 10 DEG CAUTION 10-110 DEG NORMAL 110-115 DEG CAUTION 115 DEG MAXIMUM
PRESS 2000 PSI MINIMUM 2001-2700 PSI CAUTION 2700-3150 PSI NORMAL 3150-3800 PSI CAUTION 3850 PSI MAXIMUM
LEVEL
LOW (75 CU IN) MINIMUM
REFL (75-85 CU IN) CAUTION
FULL (85-110 CU IN)
GENERATOR
VOLTAGE 18 VDC MINIMUM 18-22 VDC CAUTION RANGE 22-29 VDC NORMAL 29-30 VDC CAUTION 30 VDC MAXIMUM
AMPERAGE
0-400 AMPS NORMAL
400-600 AMPS CAUTION RANGE
600 AMPS MAXIMUM
BATTERY
VOLTAGE 18 VDC MINIMUM 18-22 VDC CAUTION RANGE 22-29 VDC NORMAL 29-30 VDC CAUTION 30 VDC MAXIMUM
APU GENERATOR
VOLTAGE 0-17.9 VDC LOW 18-21.9 VDC AVOID RANGE 22-29 VDC NORMAL 29.1-29.9 VDC AVOID 30 VDC HIGH
AMPERAGE
0-200 AMPS NORMAL
200.1-299 AMPS AVOID
300-400 AMPS HIGH
ESTL/NON ESTL DC BUS
VOLTAGE 18 VDC MINIMUM 18-22 VDC CAUTION RANGE 22-29 VDC NORMAL 29-30 VDC CAUTION 30 VDC MAXIMUM
ESTL/NON ESTL AC BUS
104 VAC MINIMUM 104-108 VAC CAUTION 108-118 VAC NORMAL 118-125 VAC CAUTION 125 VAC MAXIMUM
ROTOR BRAKE LIMITATIONS
- Do not apply rotor brake above 60 percent Nr.
- Do not apply rotor brake below 25 percent Nr.
- Release the rotor brake prior to 0 percent Nr to avoid sudden stoppage.
- During rotor brake start, release brake within 25 seconds after 67 percent Ng is attained.
- During rotor brake start, ROTOR BRAKE light should extinguish within 30 seconds after brake release.
- Do not exceed engine idle rpm (67 ±3 percent Ng) with rotor brake engaged.
LANDING GEAR LIMITATIONS
Landing is permitted at maximum gross weight for all headings on sloped surfaces up to and including six degrees
Maximum Airspeed Limitation
The maximum airspeed limits (VNE) are:
- Below 10,000 feet density altitude (DA) — 200 KIAS.
- Above 10,000 feet DA — 100 KIAS.
Other maximum airspeed limits are:
- Autorotation — 120 KIAS.
- Sideward/rearward flight — 45 KIAS.
- SCAS failure — 100 KIAS.
Altitude Limitations
The maximum operational altitude is 10,000 feet pressure altitude
MANEUVERING LIMITATIONS
Operations above 10,000 feet DA — Roll limit of 30º.
Acceleration limits-Acceleration cueing is provided by the G meter and cyclic stick buzzer
at 2.5 g’s.
Prohibited Maneuvers
- Aerobatic maneuvers as defined by OPNAVINST 3710.7.
- Practice autorotations to touchdown are prohibited.
- Practice autorotation entries within the shaded areas of the height velocity diagrams are prohibited.
- Dual-engine throttle chops above 120 KIAS are prohibited.
- Single-engine throttle chops above 60-percent MRGB torque are prohibited.
- Do not exceed 50-percent MRGB torque at airspeeds above Vh while in a dive.
- Abrupt, simultaneous collective and cyclic inputs while maneuvering are prohibited.
WEIGHT LIMITATIONS
Maximum gross weight of helicopter is 18,500 pounds.
GROUND HANDLING LIMITATIONS
- Maximum jacking weight is 14,000 pounds.
2. Maximum towing weight is 18,500 pounds.
PROHIBITED OPERATIONS
Gravity fueling with engines and/or APU operating is prohibited.
No flight shall be planned to terminate with a fuel state less than 300 pounds.
Except for emergencies, intentional in−flight operation with HYD 1 or HYD 2 PBA selected to OFF is prohibited.
Blade Fold or Spread Limits
Blades should not be folded or spread in winds over 45 knots, from any direction
AIRCREW LIMITATIONS
Avoid placing metallic objects, electrical conducting materials, or electronic gear within 400−mm (15.75−inch)
magnetic zone of influence located around magnetic head trackers and helmet receivers