Lecture 15 -R22 Flight Safety (SFAR) -Pre-flight, Pre-start and Shut Down Private Pilot Licence...
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Transcript of Lecture 15 -R22 Flight Safety (SFAR) -Pre-flight, Pre-start and Shut Down Private Pilot Licence...
![Page 1: Lecture 15 -R22 Flight Safety (SFAR) -Pre-flight, Pre-start and Shut Down Private Pilot Licence (Helicopter Ground Course)](https://reader036.fdocuments.us/reader036/viewer/2022062511/55146cf2550346b0158b4e65/html5/thumbnails/1.jpg)
Lecture 15
- R22 Flight Safety (SFAR)
- Pre-flight, Pre-start and Shut Down
Private Pilot Licence (Helicopter Ground Course)
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Lecture 16
- Hangar visit
- Ground Demo: Pre-flight, Pre-start
- Written Assessment
Private Pilot Licence (Helicopter Ground Course)
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L15 - RHC Safety Alert
Low G - Pushovers
Low RPM Rotor Blade Stall
Settling with power
Carburetor Ice
Power Lines
Night Flight + Bad Wx
Airplane Pilots High Risk
RHC Safety Course Movie 16:50-19:00
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L15 - Low G - Pushover (No Practice)
Tail rotor pushes ship to roll R
Pilot tend to control cyclic to L
Mast tilt to its limit
Stopper chop the mast
Cause mast bumping
Mast may come off in flight
Action to cure:
Aft cyclic to reload then roll Left
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L15 - Low RPM rotor stall (No Practice)
sound and light warning (<97%)
pilot raise collective worsen case
main rotor decay very fast
Blade stall fell or blow back
Cut off tail cone
Fall straight down
Action to cure:
Roll throttle on then lower collective
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L15 - Settling with power
Push down by own MR downwash
High descent rate and slow speed
<300 fps before <30 KIAS
lower descent rate before reduce speed
Action to cure:
Fore /sideway cyclic to escape the MR downwash
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L15 - Carburetor Icing (No Practice)
Latent heat drawn from vaporized fuel
Ice formed from water vapour around venturi tube
Causes: in (1) Cool temp or (2) high humidity and
(3) when reduce power at/below 18” MP
Action to prevent: Apply Cab heat
(1) before reduce to 18” MP (2) CAT enter yellow arc
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L15 - Power LinesRHC Safety Course Movie 06:54-07:50
Avoid below 500 ft
Fly above the tower /pole
Look around
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L15 - Night Flight and Bad Weather
No Heli flying without horizon ref
No actual IFR flying
Keep visual on horizon
avoid IMC
Action to follow just in case IMC:
(1) Rely on attitude instrument flying (2) climb to safe altitude and (3) call assistance and look for VMC landing
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L15 - Airplane Pilot flying attitude
Different airspeed concept
Stall recovery reflex reaction
Golden rule to avoid mishaps:
Practice makes perfect /w CFIs
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L15 - NTSB Accident Report on R22
Yr 1979 - 1994
Total Engine Pilot Other
334 24 306 4
% 7% 92% 1%
No. of R22 in op in 1980: 35
No. of R22 in op in 1994: 745
No. of R22 in op in 2004: (3700)
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L15 - NTSB Accident Report on R22
UK - 250 R22 only 2 in-flight breakup
Japan - Use for tuna fishing, 110/month, No single breakup, low RPM, mast bumping
Australia - Cattle mustering, few breakup of similar type
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L15 - NTSB Accident Report on R22
Primary Causes:
(1) Wire strike
(2) Low RPM blade stall
(3) Continue enter IMC
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L15 - NTSB Accident Report on R22
In 1995 FAA suggestion
to cure Low RPM blade stall
- install a new rotor governor system
- training pilots on throttle/collective control not relying on governor/ correlator
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L15 - NTSB Accident Report on R22
to cure Low RPM blade stall
- Re-design the cyclic control so as more easy for each pilot to gain control
- Remain unchanged use T-bar cyclic
(1) New design heavier
(2) More danger if leaning forward accidentally
(3) Get use to old design by many pilots
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L15 - NTSB Accident Report on R22
Facts to note:
(1) Number of R22
1980 1994 2002
35 745 3355
Av yr - 53 326
%> - 51 515
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L15 - NTSB Accident Report on R22
Facts to note:
(2) Most surviving Low RPM cases
- Backside of the power curve
- Downwind approach
- High density altitude
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L15 - NTSB Accident Report on R22
Facts to note:
(3) 30% of engine failure due to
- Carb ice during practice auto
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L15 - NTSB 90-2K Acc (Engine type)Year Total Recip Turbo Other
1990 233 132 (57%) 99 (42%) 2 (1%)
1991 198 122 (62%) 67 (34%) 9 (4%)
1992 211 116 (55%) 70 (33%) 25 (11%)
1993 183 94 (51%) 76 (42%) 13 (7%)
1994 220 100 (45%) 105 (48%) 15 (7%)
1995 164 84 (51%) 76 (46%) 4 (3%)
1996 181 77 (43%) 98 (54%) 6 (3%)
1997 174 82 (47%) 80 (46%) 12 (7%)
1998 203 103 (51%) 87 (43%) 13 (6%)
1999 213 80 (38%) 106 (50%) 27 (13%)
2000 231 81 (35%) 93 (40%) 57 (25%)
Total 2211 1071 (48%) 957 (43%) 183 (8%)
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1. Emergency locator transmitter
2. Emergency VHF frequency - 121.5
3. Transponder codes
Emergency - 7700
Lost - 7600
Hijack - 7500
L15 Emergency Procedures
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Emergency Location Transmitter
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ELT
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ELT
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L15 Frequency & Transponder code
Emergency - 121.5 MHz“May Day May Day May Day”“Pan Pan Pan”Transponder
Emergency-7700Lost- 7600Hijack- 7500
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Helicopter Safety
Settling with Power – GyroplaneSettling with Power - CH47Dynamic Roll over – B206Nearly Roll over – R44
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L16 R22 Preflight, Prestart & Shutdown Check