5’s Flashcards
Engine oil pressure limits
Pressure limits for:
NG at ground idle - 5 psi NG 80% to 95% - 32 psi NG equal to or greater than 95% - 50 psi Normal operation - 35 to 90 psi Maximum for contingency power - 110 psi Maximum for cold weather starts - 150 psi
Max engine oil temperature (at what temperature does caution activate)?
149 C
ENG XMSN oil temperature limits.
Caution vs Warning
Caution activates greater than 140 C
Warning activates greater than 190 C
XMSN oil temperature limits. (At what temperature does caution activate)?
Greater than 140 C
XMSN oil pressure limits.
Minimum at ground idle- 7 psi
Minimum at 100% NR - 20 psi
Normal operation - 20 to 90 psi
Flight Control Hydraulic Pressure normal operating range
2,500 to 3,200 psi
Utility System Hydraulic Pressure normal operating range
2,500 to 3,500 psi
Hydraulic system temperature,
Cautionary range and max
Caution range 95-120 C
Max 120 C
Rotor speed limitations
Minimum transient power on- 91% Transient - 91% to 97% Normal range - 97% to 101% Transient - 101% to 106% Max power on - 106% Max autorotation - 108% *Maximum transient* - Max Transient per Table 5-5 is 111%. 111.5% only pertains to the note regarding the 2408-13-1 entry requirements.
Should NR exceed _____% but not ____%, no entry need be made on a form (BONUS), but willful operation will not be conducted in this range.
108%, 111.5%, DA Form 2408-13-1
CGI ranges
Green - normal operation
Yellow - transient
Red - avoid
White - test
Flight with NR equal to or less than ____% with an inoperative CGI is ________.
98%, prohibited
Any excursion into the red or yellow band of the CGI for more than ____________ requires and entry on DA Form 2408-13-1.
45 seconds
The APU shall not be started with a tailwind in excess of ________knots.
25 knots
Main engines shall not be started with a tailwind in excess of ________knots.
10 knots
If it becomes necessary to shutdown outside of [tail] wind limits shown in figure 5-6 or 5-7, the following precautions are recommended:
Aircraft should land in an area which is
- clear
- level as possible
- at least 300 feet away from verticals obstructions
- positioned so that wind is coming at the aircraft from the left side
PTIT Limits
MAX continuous- up to 816 C
30 minutes - 816 to 854 C
10 minute - 854 to 899 C
2.5 minute(contingency)- 899 to 932 C
12 seconds (MAX TRANS)- 932 to 943 C
NG limits
Ground idle minimum- 50%
Maximum- 111%
Max NP speed (%)
111.5%
Only those fuels listed in ______________ shall be used. Emergency fuel shall not be used for more than ________ cumulative time
Chapter 2
6 hours
Max GWT
50k
Cargo hook(s) limitations
FWD or AFT hooks- 17k
Tandem load- 25k
Center hook- 26k
When a combination of internal and external loads are carried on the same flight and external load exceeds _________ pounds, internal load should be positioned forward of the ________.
12k
Utility hatch
Cargo Winch weight limitations
The cargo winch is rated at 3,000 lbs straight pull. With one pulley the mechanical advantage is doubled to 6,000 lbs. 2 pulleys gets you 9,000 lbs and 3 pulleys the grand total of 12,000 lbs. 5-4 Helicopter Loading Limits paragraph d. (PDF Page 711)
The rescue winch is limited to a maximum load of _____ pounds.
600 lbs
Maximum crosswind or sideward flight is ___knots
45 knots
Maximum airspeed rearward flight
40 knots
Maximum tailwind during hover
40 knots
Max airspeed with lower section of cabin entrance door open and locked
60 KCAS
Rescue hatch shall not be opened or closed above ________KCAS
90 KCAS
Upper section of cabin entrance door may only be closed below ________KCAS
100 KCAS
CAUTION
A dual _______ primary channel failure may occur when in rearward flight or a tailwind in excess of ______ knots.
FADEC
40 knots
If a sling or hook should fail while carrying a tandem load, limit airspeed to a maximum of:
60 KCAS
Airspeed limits:
Single DAFCS
DAFCS Off
Single -100 KCAS or VNE
Both off- 160 KCAS or VNE, provided DAFCS are turned off below 100 KCAS
Aerobatics are prohibited with this helicopter. Aerobatics are defined as intentional maneuvers beyond:
30 degrees pitch
60 degrees roll
When operating with BALT/RALT engaged, limit bank angles to _____degrees maximum
45 degreees
Maximum speed for roll on landings
Maximum nose up attitude
60 KGS
20 degrees
Maximum rates of descent
Up to 33k lbs-492 ft/min
33k to 40k- 450 ft/min
Greater than 40k lbs-360ft/min
Ground operation limitations
0.75” pedal input
1” lateral cyclic
2” aft cyclic
Thrust control lever no lower than ground detent
When will a blade watcher and taxi director be positioned?
- When ground taxiing less than 75’ from an obstruction
- on an unimproved or unfamiliar airfield not designated for CH47’s
The CH47 is qualified for flight in instrument meteorological conditions provided the following exist:
- both DAFCS are operational
- SFD’s are operating
- three MFD’s, two CDU’s, two GPPU’s, two DCU’s, two EGI’s, two ADC’s are operational
- MFD 1 and 4 are mandatory with the third MFD being either 2 or 3. MFD 5 is optional. 5-7 Helicopter Environmental Restrictions paragraph b. (PDF page 719)*
Coupled ILS approaches at localizer intercept angles of greater than ______ degrees are prohibited.
60 degrees
Shock absorber vent valves
Temperatures for operation
Open for operation- below (minus) -18 C
Closed for operation- above (minus) -1 C
Max airspeed with skis
130 KCAS or VNE
Max rates of descent with skis + taxi speed
Up to 33k-480 ft/min
46k to 50k- 240 ft/min
Maximum taxi speed is 5KGS
Windshield heat shall not be used above ________ C.
24 C
Maximum rate for pressure refueling
300 gal/min at 55 psi
-10, pg. 2-45
The maximum internal pressure of ERFS II tank
5 psi
How many first aid kits are on board a 47?
7
How many first aid kits are required to fly?
1-services 5 crew members
When will the emergency lights come on?
1) loss of electrical power
2) landing in excess of 3-4 G’s
