Chapter 5 Flashcards
Flight with Canopy Enclosure Open
Flight with the canopy open is prohibited, except for smoke/fume elimination.
Maneuvering Limits
Intentional maneuvers beyond attitudes ± 30º in pitch and ± 60º in roll are prohibited.
APU OPERATING LIMITS - CAUTION 1 (NR %)
CAUTION: Avoid prolonged operation at 94% - 96% NR with the APU running. The APU clutch will oscillate from engaged to disengaged. This creates high loads on the clutch and shall be avoided.
Airspeed Limits With One Engine Inoperative
Maximum airspeed with one engine inoperative is the greater of:
- 67% of VNE determined from Figure 5-13 using the GROSS WEIGHT line. Above this, a successful autorotation may not be possible due to rapid NR decay.
- The airspeed for minimum power determined from the applicable Chapter 7 cruise charts using the MAX END/MAX R/C lines.
APU Operating Limitations
APU operation is prohibited during normal flight. After a fault or aborted start, wait 30 seconds after APU has stopped before attempting another start. After 2 consecutive start attempts, wait 20 minutes before a third start attempt. No more than three start attempts are permitted in one hour.
APU OPERATING LIMITS - CAUTION 2 (XMSN Temp)
CAUTION: Do not operate the APU for more than 5 minutes at a XMSN TEMP 1 or 2 of 120 - 130º C. Shut down APU to prevent damaging accessory gearbox components.
Maximum Airspeed for Searchlight Extension
The searchlight is designed for operation (extend/retract/rotate) at speeds up to 90 knots. However, as long as operation is not attempted, the lighthead can be left in any extended position at speeds up to VNE.
LIMITS - TORQUE (%) - Single Engine
125 Maximum (> 125 red)
123 - 125 Transient 6 sec (yellow)
111 - 122 Single engine contingency, 2.5 min (yellow)
110 Single engine maximum continuous power (green)
0 - 110 Normal operation (green)
Landing Limits
Do not complete a landing on terrain which produces a pitch attitude change from a hover greater than 7º nose up or 12º nose down; or a roll attitude greater than 10º. Data is not available beyond these limits at gross weights above 17,650.
Flight into Turbulence
Flight into known or forecast extreme turbulence or into known severe turbulence is prohibited.
LIMITS - TORQUE (%) with NR < 90%
70 Maximum (> 70 red)
0 - 70 Normal operation (green)
701D TGT Limiting Range
Dual Engine: 879 ± 12 (854-878)º C
Single Engine: 903 ± 12 (879-903)º C
Airspeed Limits For Autorotation
Maximum airspeed for autorotation is 145 KTAS. Above 145 KTAS, drag on the rotor system will cause NR to decay rapidly.
Minimum rate of descent airspeed is 77 KTAS.
Maximum glide distance airspeed is 107 KTAS.
Excessive Tail Rotor Scissors Loads
Avoid aggressive directional and lateral control inputs greater than 1 inch/second when conducting combat maneuvers requiring a left turn. This is to prevent excessive tail rotor scissors loads.
LIMITS - 701D TGT (ºC)
949 Maximum (> 949 red)
904 - 949 Single engine transient, 12 sec (yellow)
880 - 903 Single engine contingency, 2.5 min (yellow)
847 - 879 Maximum rated power, 10 min (yellow)
851 Max during start
794-846 Intermediate rated power, 30 min (yellow)
793 Maximum continuous power
0 - 793 Normal operation (green)
LIMITS - ENG1 or 2 OIL PRESSURE (PSI)
120 Maximum (> 120 red w/box)
23 - 120 Normal operation (green)
23 Minimum (< 23 red w/box)
LIMITS - TORQUE (%) with NR < 50%
30 Maximum (> 30 red)
0 - 30 Normal operation (green)
Flight In Instrument Meteorological Conditions
The aircraft is not qualified for IMC flight. The back-up flight instruments are required to be installed and operational for all flights.
Rotor Limitations - Start and Stop Limits
Maximum wind velocity for rotor start or stop is 45 knots to prevent droop stop damage.
LIMITS - NR (%)
110 Maximum (> 110 red)
106 - 110 Transient operation (yellow)
106 High rotor warning annunciated
95 - 105 Normal operation (green)
0-94 Transient operation (red)
Use of Force Trim
Force trim will not be selected off except in a failed or partial failed mode.
Maximum Airspeed for Stores Jettison
Jettison of external armament stores is not authorized except for emergency conditions and then only from unaccelerated flight during:
- Maximum airspeed for stores jettison is 130 KTAS
- Hover to 45 KTAS (minimize side slip, if possible)
- 45 - 130 KTAS (ball centered, if possible)
LIMITS - HYDRAULIC PRESSURE (PSI)
>3410 Transient - permitted for 5 sec (yellow) (≥ 5 sec red w/box)
3310 - 3400 Transient - permitted for 5 min (yellow) (≥ 5 min red w/box)
2750 - 3300 Normal operation (green)
2600 Minimum for APU start
1650 Minimum for emergency hydraulics
1260 Minimum (< 1260 red w/box)
LIMITS - ENG1 OR 2 NG (%)
106 Maximum (> 106 red)
- 1 - 106 Transient 12 sec (yellow)
- 1 - 105 Normal operation (green)
- 0 Minimum engine out warning annunciated (< 63.0 red w/box)
Excessive Tail Rotor Loads
Avoid large pedal step inputs in arresting right hovering/low speed yawing turns greater than 60º/second. This is to prevent excessive tail rotor drive system loads.
Maximum Rearward/Sideward Airspeed
Maximum rearward/sideward airspeed is 45 KTAS for all gross weights.
Exceeding Operational Limits
Any time an operational limit is exceeded, an appropriate entry shall be made on DA FORM 2408-13-1. Entry will state what limit or limits were exceeded, range, time beyond limit, and any additional data that would aid maintenance personnel in the maintenance action that may be required.
Engine Starts At Ambient Temperatures of 61º F (16º C) and Below
Two consecutive start cycles may be made, followed by a 3 minute rest period, followed by two additional consecutive start cycles. A 30 minute rest period is then required before any additional starts.
Engine Starts At Ambient Temperatures Above 61º F (16º C)
Two consecutive start cycles may be made. A 30 minute rest period is then required before any additional starts.
Dual Engine Starts
Dual engine starts are prohibited due to insufficient IPAS air.
LIMITS - TORQUE (%) - Dual Engine
115 Maximum (> 115 red)
101 - 115 Transient 6 sec (yellow)
0 - 100 Normal operation (green)
LIMITS - ENG1 OR 2 NP (%)
121 Maximum (> 121 red w/box)
115 Engine overspeed annunciated
106 - 121 Transient operation, 12 sec (yellow, w/box at 115)
0 - 105 Normal operation (green)
Engine Starter Limitations
The Air Turbine Starter (ATS) is capable of making the number of consecutive start cycles listed below, when exposed to the environmental conditions specified, with an interval of at least 60 seconds between the completion of one cycle and the beginning of the next cycle.
A starting cycle is the interval from start initiation and acceleration of the output drive shaft, 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.
Weight Limitations
The aircraft maximum gross weight is 20,260 pounds, except for non-tactical ferry flights, which may not exceed 23,000 pounds.
Maximum Airspeed During Manual Stabilator Operations
Maximum airspeeds are based on stabilator position. The stabilator position and nominal airspeed restrictions are displayed on the FLT, FLT SET, and SYS pages, as described in Paragraph 2-46d.
Flight In Icing Conditions
Intentional flight into moderate icing conditions is prohibited. Flight into known or forecast trace or light icing conditions is authorized and not considered a hazard unless the condition is encountered for an extended period (over one hour).
Extended APU Ground Operations
During prolonged ground operations greater than 30 minutes observe XMSN TEMP 1 and XMSN TEMP 2 on the **SYS **page. If the temperatures exceed 130º C, the APU shall be shutdown and the transmission fluid allowed to cool for 30 minutes prior to resuming APU ground operations; or transmission fluid may be cooled by operating an engine with rotor turning.
