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Wednesday 30 October 2013

Falcon 10 - Notes from Sim Training:

Elevator Runaway Pitch-Trim Prevention (Primary & Secondary)

Indications:
In addition to the abnormal pitch sensations, an aural indication that the elevator trim has begun to run away is the audible (& continuous running of the) trim "clacker" sound, telling the crew of the stabilizer pitch-trim in-motion.  Recognition of this clacker with a "longer-than-normal" time duration, would be one of the first indications that your stab trim has begun to runaway on the Falcon 10.

Part 1:  Primary Pitch-Trim "Runaway" ("A" Bus powered)
To recover from the unlikely event of a "Runaway Pitch-Trim", plan to pull the labelled "Stabilizer-NORMAL" circuit breaker on F/O CB Panel - (3rd down, 1 across from Right Side of the F/O cb panel)

Note: While unlikely in real life, (but happens in sim, and there is a report of this happening in a Falcon 20) should a subsequent Secondary Trim (Emergency Trim) failure occur ... here is a strategy to deal with it.  As a minimum, your knowledge of this will impress the sim instructor.

Part 2:  Secondary (or Emergency) Pitch-Trim Runaway ("D" Bus powered)
Lets say that after the Primary Trim failed you began to use the Secondary Trim System.   This should be quite usable for the balance of your flight...but what would you do if the Secondary Trim fails on you?

The secondary trim can be shut-off using the AUX bus switch. So...should the Secondary Trim (Emergency Trim) runaway as well, simply switching OFF the AUX bus will stop this runaway before it trims you too far from where you want it to be (thus significantly affecting your control of the aircraft).

Jammed Stabilizer 
(possibly caused from a full-blown Pitch-trim Runaway Occurrence where the trim has run fully to a nose up position and then stopped there ...Remembering what checklist to call for at this point will be difficult, as you are not totally in control of the aircraft, but rather struggling significantly).

When in a nose-high attitude and unable to get the nose down to descend, you can begin a descent by rolling into a series of turns (L & R) (instead of continuing to fly straight & level with a nose-high attitude). The nose will thus drop through the horizon, while meanwhile the PNF is moving the passengers to a more forward position. Teamwork is critical here.

Windshear Recovery/Escape

The Falcon 10 does not have a stick-shaker that normally you could target to recover from windshear, a good strategy to deal with an extreme wind-shear would be to target 20 degrees nose up and simultaneously apply MAX Power to escape from the threat.

Hydraulics
Acrostics to remember which items powered from HYD #1 and HYD #2:

#1 - B  -Brakes                              #2 - N -Nosewheel                                                                    
        A -Antiskid                                        E -Emergency Brake
        L  -Landing Gear                                E-Emergency Slats
        S -Slats  (Inb & Outb)                        T-Thrust Reversers
        A -Airbrake                                        Y-Yaw Dampner
        Q -Arthur Q