47D Gotchas Flashcards
Engine Horsepower
10 Min Limit… 4,867 hp
2.5 Min Limit… 5,069 hp
Rotor Tach Markings
91… minimum transient (red line)
97-101… green arc
102-105… transient (yellow arc)
106… max transient power ON (red line)
108… max during autorotation (red line)
111… max transient (red line)
Flight Hydraulic Pressure Markings
2500psi… lower red line
2500-3200psi… green arc
3200psi… upper red line
Utility Hydraulic Pressure Markings
2500psi… lower red line
2500-3500psi… green arc
3500psi… upper red line
Utility and Flight Control Hydraulic Temp Markings
95-120C… yellow arc
120C… red line
PTIT Limits (Tha Realist)
MCP… 816
30 Min Max… 854
10 Min Max… 899
2.5 Cont… 932
12 Sec Cont… 943
N1 Limits (Tha Realist)
Ground Idle Min… 50%
Max… 111%
N1 over 111% is an engine overspeed
Emergency Fuel (100LL)
Emergency fuel shall not be used for more than 6 hours cumulative time.
Use of Shall, Should, and May
Shall… mandatory requirement
Should… nonmandatory but preferred method of accomplishment
May… an acceptable method of accomplishment
Flight Controls out of Neutral
It is possible for the ground to forward rotor blade clearance to be 4 feet 4 inches
Blade Chord
32 inches
“Warning”
An operating procedure, practice, etc. which if NOT correctly followed, could result in personal injury or loss of life
“Caution”
An operating procedure, practice, etc. which, if not strictly observed, could result in damage to or destruction of equipment
“Note”
An operating procedure, condition, etc. which is essential to highlight
Aerobatics Defined (also, prohibited)
Intentional maneuvers beyond 30* Pitch and/or 60* Roll
Bank Angle Limits
With working CGI, they are limited by CGI but not to exceed 60* bank.
When using altitude hold, limit bank angle limits to 45* max.
With inop CGI, use bank angle limits defined in Fig 2-5
Bleed Band Actuator
Primary mode… HMU uses P3 pressure to control bleed band actuator, causing the band to snap open and closed
Reversionary mode… HMU uses fuel pressure as controlling medium, causing the band to modulate (slowly open or close)
Fig 3-4 SE Service Ceiling Contingency Power “Note”
Chart based on aircraft flying Vy to provide a max of 100fpm climb for given pressure altitude and temp
Fuel/Oil/Hydraulic Filter LRBs
All filters can be bypassed except for the 3 hydraulics Pressure filters
Dual Engine Fires
Fight one fire at a time. If both Fire Pull Handles are out and agent is discharged, it will be sent to both engines at an unknown ratio (not 50/50)
Engine Transmissions
The engine transmissions are interchangeable
XMSN OIL PRESS light with normal pressure indications
The aft shaft doesn’t have a pressure transducer but does have a pressure switch that illuminates the XMSN OIL PRESS light at 10psi or less. This could cause the XMSN OIL PRESS light to illuminate whole the gauge shows normal pressure ranges