PIPER TWIN COMANCHE (PA-30) MANEUVERS GUIDE

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JAX NAVY FLYING CLUB PIPER TWIN COMANCHE (PA-30) MANEUVERS GUIDE Version 5 April 2023 1 “CHAP” checklist) C = Clearing turns H = Heading - bug (pick outside reference also) A = Altitude (see restrictions in ACS) P = Proper configuration (GUMPS - see maneuver for specifics) G: Gas (fuel selectors) – On. U: Undercarriage – As required. M: Mixture - As required. P: Props - As required. S: Switches (fuel pumps / landing light) - As required. **Cowl Flaps Open for all maneuvers except emergency descent** Transfer of Flight Controls Positive three-step process for exchanging flight controls between pilots: • When one pilot seeks to have the other pilot take control of the aircraft, he or she will say, "You have the flight controls." • The second pilot acknowledges immediately by saying, "I have the flight controls." • The first pilot again says, "You have the flight controls," and visually confirms the exchange. Pre-Takeoff Brief If anything abnormal happens prior to Vr, I will abort the takeoff by bringing both throttles to idle. If I have an engine failure after Vr and there is still runway left to land on, I will reduce power and land on the available runway. If I have an engine failure after Vr and there is no runway left to land on, I will maintain aircraft control and execute single engine emergency procedures. Takeoff ground roll distance is _____ Takeoff distance over 50’ is _____ Single engine ROC is _____ Accelerate / Stop distance is _____ Any questions? 2 3 4 Mixture – Full Forward. Props - Full Forward. Throttle - Full Forward. Pitch - Positive climb attitude (10 degrees nose up, 112 mph). Flaps - Reduce to 15 degrees. Gear - Confirm positive rate of climb. When out of usable runway: Call “positive rate, gear up,” and select gear up. Retract remaining flaps. Cowl Flaps - Open. 5 Approaching midfield downwind: GUMPS check (flow): G – gas (fuel selectors) on MAINS. U – undercarriage - select gear down when abeam landing point (performance permitting) M – mixtures full rich. P – props full forward. S – switches (fuel pumps and landing lights on). Complete Single Engine Landing Checklist. Abeam landing point: (upon decision to leave pattern altitude): Select Gear Down. Verify “ ” Power as required (18” MP recommended). Pitch for 115 mph. Turning base: GUMPS check. On final: Pitch for 105 mph (blue line) once established on final. On short final (before threshold): Verify gear down. Single Engine Go-around NOT recommended (and not allowed on training flights). 6 Verify at or above 3,000 AGL. Pre-maneuver checklist complete. Airspeed 140 mph (below Va). GUMPS check: G - gas (fuel selectors) on. U - undercarriage up. P - props at cruise. S - switches (landing lights on). Initiate Perform Cruise Flow & Checklist. 7 Pre-maneuver checklist complete. G - gas (fuel selectors) on. undercarriage down “ P - props full forward. S - switches (fuel pumps and landing lights) on. Flaps (below 125 mph) set to 27° in increments. Maintain approximately 90 mph. (stall light plus 5-10 - stall light should not be seen once stabilized) Simultaneously add full power, reduce pitch (Nose to horizon). Set flaps to 15 degrees (3 second count). Select gear up. Remaining flaps up (below 125 mph). Maintain level flight (maintain altitude) through recovery. Perform Cruise Flow & Checklist. 8 (stall light plus 5-10 mph - stall light should not be seen once stabilized) 9 GUMPS check: Flaps - Reduce to 1/2 (15 degrees, 4 second count). Gear - Confirm positive rate of climb. Call “positive rate, gear up,” and select gear up. Retract remaining flaps. 10 Pitch for 95 mph. 11 Pitch for 95 mph. 12 Pitch to maintain altitude. 13 14 15 16 17 Drag/Speed/Vyse Demo (MEI Syllabus): Demonstrating the Effects of Various Airspeeds and Configurations During Engine Inoperative Performance Verify altitude at or above 4,000. Pre-maneuver checklist complete. Select reference point and heading. Set throttles to 15” MP. As airspeed falls below 120 mph - move props slowly full forward. Set left engine to zero thrust (2200RPM – approx. 10” MP) and right engine smoothly to max power. Maintain 2 degree bank into good engine and ½ ball out. Pitch for 105 mph and note climb performance. Pitch for 100 mph and note climb performance. Pitch for 110 mph and note climb performance. Set pitch back to 105 mph. Airspeed below 150 mph, select gear down, note climb performance. Airspeed below 131 mph, extend flaps smoothly and in increments to 27 degrees, note climb performance. Select gear up, note climb performance with just the flaps down. Retract Flaps to zero smoothly and in increments. Set throttle to idle on the left engine (windmilling prop) and note climb performance. RECOVERY to cruise: Set throttle on left engine to 15” MP and the right engine to 20” MP / 2500 RPM. Allow cylinder head temps to reach the green arc before going back to cruise power. 18 Operating Notes / Common Errors GROUND OPERATIONS - Always provide a taxi brief to Instructor/Examiner prior to taxi, including after landing. - Do not ride the brakes during taxi if less power is available (idle), taxi too fast, or turn off the runway too fast. TAKEOFFS - Do not ride the brakes during takeoff. - Use the brakes correctly at beginning of short field takeoff – aircraft should not be moving until brake release. - Make timely and correct response to cues of an anomaly or engine failure on takeoff roll. LANDINGS - Short Field Landings: Retract flaps after touchdown, and simulate using maximum braking after touchdown. Conduct a Go-Around if approach is not stable or if aim-point will be missed. ACS allows a Go-Around. - Retracting flaps on normal landings: FAA guidance is to not touch flaps, windows or radios while on roll-out from any landing. The only acceptable time to retract flaps while rolling on an active runway is for a short field landing. If you get used to retracting flaps on every landing roll-out, one day you may accidentally raise the gear on rollout by mistake.