Saab 340B Acronyms

• S witch to closed
• A CM temp above 225C
• D uct temp above 82C
• F ire Handle Pulled
• O ver temp (bleed air) 288C
• O ver pressure (bleed air) 43 PSI

• M ain DC bus power lost
• O ver temp (bleed air) 288C
• O ver pressure above 76 PSI
• F ire Handle Pulled
• S hutdown Engine

• A HRS
• R adio Altimeter
• E FIS
• N av Receivers
• A ir Data Computer
• A ltitude Preselector/ Alerter

• F ire handle pulled
• E xternal power is being used
• M alfunction detected by GCU (except over temp)
• S tarting (between 0-55% Ng)
• S witch OFF

• A udio System backup power
• B us-Tie relay connection function
• E ngine Fire detection L/R
• T ail Pipe Hot detection L/R
• W arning System backup power
• E mergency Voltage indicator
• E mergency Avionics Bus (VHF Comm 1/ Stby Horizion)
• S tandby Instrument lighting

• G PU used
• O ne Gen operating
• L eft or both BAT switches ON

• A ir in Aft Cargo
• S upplementary A/C
• P assenger Reading Light
• H eat Function on TAMDAR
• A ctive Noise Control
• L av Function
• T ea (Galley & Jug Heaters)

• B attery Voltage Indicator
• D ome, Enterance, & Cargo Lights
• F ire Handle
• A HRS 1 Backup Power
• C argo Fire Extinguisher
• E ngine Fire Extinguisher

• B attery Voltage Indicator
• R efueling/ De-fueling Power
• F ire Handle
• A HRS 1 Backup Power
• C argo Fire Extinguisher
• E ngine Fire Extinguisher

• F DR
• R adar Stablization
• O verhead Panel Lighting
• G PWS/ TAWS

• C DI
• A HRS (Heading Function Comparator)
• R MI (Failure- RMI flag or CDI disappears)

• S ilences Fire Bell
• A rms Squibs
• C loses Fuel Shut-off Valve
• R esets Fire Warnings
• O pens Gen Relay
• C loses Bleed Valve

• A P/FD
• R MI 2
• R adar Wx
• M FD
• D PU 1
• D FDR

• A P/FD
• R MI 1
• M FD
• D PU2

• Takeoff: WOW on ground AND PL above 64 degrees with:
•      -Flaps above 15 or
•      -One or both CL's not in MAX or
•      -Pitch Trim out of green range
• When left engine started with FI STOP knob pulled

• Landing: Gear not down AND:
•      -Below 500' Radio Altitude
•      -One PL above 64 degrees
•      -Above & Flaps 20 or more

• One gear is up and:
•      - RA above 500' and
•      - One or Both PL above 64 degrees
• Or  Gear up and Flaps above 20

• - Switch ON
• - Landing Gear Handle Down
• - PL Above FI or WOW activated

Deactives less than 20 KIAS

• H MU
• O il Pump (Engine)
• L P Fuel Pump (Main)
• E ngine Alternator
• S tarter/ Generator

• H MU- Limits Ng Speed to 110%
• O verspeed & Drain Valve- 1573 Np Overspeed Protection
• P rop Overspeed Governor- Blocks oil when RPM above 1452 PRPM

• D ECU
• I gntition
• N g Indication

• - P rop Overspeed Gov- Blocks oil flow above 1452 PRPM
• - A C "Wild" Frequency Generator
• - L ubrication (PGB oil) Pump 
• - P rop Control Unit- Changes blade angle

If you lose all oil pressure in PGB props feather to 50 degrees due to counter weights

• V ariable Inlet Guide Vanes (VIGV)
• A nti-Ice/ Starter Bleed Valve (AISBV)
• N g Speed Limiting (110%) shuts off fuel/ engine
• E ngine Fuel Flow Metering (HP fuel pump)
• S tores the Torque Motor

• - C TOT
• - A PR
• - B ottom Governing

Can be locked out w/ CL going over max gate & back. Will lose reverse thrust capability on landing b/c no more bottom gov. Reset CL=Fuel Off.

• B ottom Governing- Maintains 1040 PRPM, Full Reverse= 1200 RPM (-13 degree blade angle)
• A utomatic Power Reserve (APR)- boosts TQ by 7% when engine fails (Autocoarsen must be on)
• I TT- Internal Torque Temperature
• T orque and Prop RPM indications
• C onstant Torque on Takeoff (CTOT)
• A uto Ignition- Stays on for 7 secs (Off at less than 62%)
• N p Overspeed Protection- 1573 PRPM opens ODV

• Armed Low:
•      - S witch ON
•      - O ne or both PL's above 64 degrees
•      - N g above 55%
•      - N e above 60%

• Actived Low:
•      - Switch ON
•      - Good Engine Ng above 55%
•      - Bad Engine Ng below 55%
•      - Bad Engine Ne below 60%

• Armed High:
•      - S witch ON
•      - P L's above 64 degree
•      - T Q above 50%
•      - P 3 above 120 PSI

• Activated High
•      - S witch ON
•      - P L's above 64 degrees
•      - T Q above 50%
•      - T Q diff of 25%
•      - B ad Engine TQ less than 50%
•      - B ad Engine P3 below 120 PSI

• Opens when: Gear extended and WOW or wheel speed above 25 kts
• Closes when: Gear retracted or WOW and wheel speed below 9 kts
• Override knob opens FI when pulled (must be reset by mx. CONFIG warning occurs if open when left engine started)

• PL's (below FI) controls prop angle; CL's controls fuel off or feather
• BETA Prop Angle: 8 degrees (1040 PRPM) to -13 degrees (1200 PRPM, Full Reverse)