Numbers Flashcards
What is the engine shaft horsepower rating?
1940 SHP
What is your TGT 12 second transient range?
903 - 949 C
What is your TGT 2.5 minute transient range (contingency power)? (Not limited by DEC)
878 - 903 C
What is your TGT 10 minute limit range? (Not limited by DEC)
851 - 878 C
What is your TGT 30 minute limit range?
810 - 851 C
What is your normal TGT limit range?
0 - 810 C
What are your main rotor overspeed numbers?
*
- *
- **
- 127% Nr
** 137% Nr
*** 142% Nr
ENG OUT audio comes on at __% Ng
55% Ng
HMU fuel pressure output is ___ psi
832 psi
Name the 5 abort start criteria in the Starting Engines checklist
(a) No TGT rise within 45 seconds
(b) No ENG OIL PRESS within 45 seconds
(c) No Nf or Nr indications within 45 seconds
(d) ENGINE STARTER caution light goes off before 52% Ng speed
(e) TGT reaches 851 C before 63% Ng
The Engine Starter drops out at __ - __% Ng on engine start
52 - 65% Ng
What are your minimum limits for performing a cross-bleed engine start?
Ensure the operating engine is at a minimum of 90% Ng, rotor RPM is at 100%, and AIRSOURCE HEAT/START Switch is in ENG
What are the Nf avoid ranges?
20 - 40% and 60 - 90%
What 5 lights bring on the backup pump?
1 RSVR LOW
APU ACCUM LOW
What 10 light illuminate during the Hydraulic Leak Check in the Starting Engines checklist?
#1 RSVR LOW #2 RSVR LOW BACKUP RSVR LOW MASTER CAUTION X2 SAS OFF BOOST SERVO OFF #1 TAIL RTR SERVO
3 - 5 seconds later
#2 TAIL RTR SERVO BACKUP PUMP ON
When do droop stops need to be out (startup)?
75% Nr
When do droop stops need to be in (shutdown)?
50% Nr
During the HIT check (ground taxi) retard throttles to __ - __% Nf
92 - 98% Nf
WARNING: A malfunctioning engine anti-ice in conjunction with an engine inlet anti-ice system malfunction may result in power losses as much as __%
40%
During the before taxi HIT check, do NOT fly the aircraft if TGT rise is less than __ degrees C
30 degrees C
What are the 4 modules of the engine?
Cold Section
Hot Section
Power Turbine Section
Accessory Section
The Engine Fuel Filter red button pops when the filter differential pressure reaches __ psi to indicate impending bypass
6 psi
The HMU provides Ng Overspeed Protection, shutting off all fuel flow if Ng reaches ___.
110 +/- 2
1 FUEL PRESS and #2 FUEL PRESS lights can go on when the fuel pressure drops to __ psi
9 psi
What 3 functions does the ODV provide?
Provides hot start protection
Provides Nf overspeed protection (120 +/- 1)
Purges fuel nozzles on engine shutdown
1 ENG OIL PRESS or #2 ENG OIL PRESS caution panel light will come on when the oil pressure drops below __ psi
22 psi
What 10 systems/components are on the LEFT weight on wheels switch?
Backup pump thermal switch
backup pump auto operation
Hydraulic leak test
Nr Audio
AFCC Maintenance checks
IFF/Mode 4-5
Retracted probe refueling
AN/ALE-47 CMDS
IAHHS
Windshield wiper override
What 2 systems/components are on the RIGHT weight on wheels switch?
AC Underfrequency
Control Display Unit