T-34 systems questions

• The fuel control system consists of:
• 1. an engine-driven fuel pump,
• 2. a fuel control unit,
• 3. a circular manifold,
• 4. fourteen fuelspray nozzles.
• 5. automatic fuel dump valve
• 6. two drain valves bleed off residual combustion chamber fuel afterengine shutdown.

The normal engine operating range of 400 to 1,015 ft-lb and up to a maximum limit of 1,015 ft-lb

If propeller rpm reaches 2,398, the fuel-topping function of the primarygovernor will automatically bleed Py air, reducing fuel flow in the FCU towardminimum and returning propeller rpmto within safe limits.

The propeller overspeed governor is installed in parallelwith the propeller governor and is mounted at approximatelythe 10-o’clock position on the reduction gearbox front case.

One 40-gallon tank in each wing leading edge and one 25-gallon tank in the wing panels of each wing provide a totalusable fuel capacity of 130 U.S. gallons. The two tanks in each wing are interconnected; fuel gravity feeds from the25-gallon tank into the 40-gallon tank, then into a 1.5-gallon fuel sump tank in the fuselage center section.

• *1. Condition lever—FUEL OFF.
• *2. Ignition switch—HOLD OFF (starter continue engaged).
• *3. Starter — OFF (after 20 seconds).
• *4. Ignition switch—RELEASE.

• *1. Condition lever—FUEL OFF.
• *2. Emergency fuel shutoff handle—PULL.
• Note
• After the emergency fuel shutoff handle is pulled, do not reset on the grounduntil the cause of the emergency shutdown is determined and corrected.

• *1. Canopy — OPEN (emergency open, as required).
• *2. Battery — OFF.
• *3. Harness, cords, mask—RELEASE.
• *4. Parachute—UNFASTENED.
• *5. Aircraft—EVACUATE.

• *1. Starter — OFF (as required).
• *2. Emergency Engine Shutdown — EXECUTE
• *3. Emergency Exit — EXECUTE.

• Indications of abnormal ITT may include rapidly rising ITT and smoke and/or flames from the exhaust stacks.
• *1. Emergency engine shutdown — EXECUTE.
• *2. Ignition switch — HOLD OFF.
• *3. Starter — ON (monitor for normal shutdown).If condition persists or engine fire light illuminates:
• *4. Starter — OFF.
• *5. Emergency Exit — EXECUTE.

• *1. Aircraft — STOP, using other cockpit brakes.
• *2. Aircraft — Maintain directional control and stop aircraft utilizing Beta, rudder, and remaining brakes.
• If going into unprepared terrain:
• *3. Emergency Engine Shutdown — EXECUTE.
• When aircraft comes to rest:
• *4. Emergency Exit — EXECUTE.

*1. Emergency engine shutdown — EXECUTE.

• When aborting a takeoff, proceed as follows:
• *1. PCL — FULL BETA.
• *2. Wheelbrakes — AS REQUIRED.
• If going into unprepared terrain:
• *3. Canopy — EMERGENCY OPEN.
• *4. Emergency Engine Shutdown — EXECUTE.
• When aircraft comes to rest:
• *5. Emergency Exit — EXECUTE.

• While still on runway:
• *1. Aborting Takeoff — EXECUTE.
• If airborne:
• *2. Landing gear — REMAIN DOWN

• Reduced fuel flow (rollback) is typical of a fuel control unit pneumatic sensing system malfunction. If engine will not respond to PCL movements and ITT and N1 indicate the engine is running at a very low power setting (Figure14-1), proceed as follows:
• *1. Condition lever — FULL INCREASE RPM.
• *2. EPL — ADVANCE TO DESIRED POWER SETTING.
• If the resultant power available is insufficient to execute a PEL:
• *3. EPL — DISCONNECT.
• *4. Engine failure — EXECUTE.
• If sufficient power is restored:
• *5. PCL — IDLE.
• *6. PEL — EXECUTE.

• *1. PCL — SLOWLY RETARD TO JUST BELOW STALL THRESHOLD TO CLEAR STALL.
• *2. Cockpit environmental control — FULL FORWARD.
• *3. PCL — SLOWLY ADVANCE (as required).If the resultant power available is insufficient to execute a PEL:
• *4. Engine Failure — EXECUTE.If sufficient power is available:
• *5. PEL — EXECUTE.

• *1. Flying speed — MAINTAIN (100 KIAS minimum).
• *2. Landing gear and flaps — UP.
• *3. Engine instruments — CHECK.
• *4. Condition lever — FEATHER (as required).
• *5. Landing site — SELECT.
• *6. Harness — LOCKED.
• *7. Airstart — PERFORM (if situation permits).If airstart is not attempted or is unsuccessful:
• *8. No landing site available and altitude permits — BAILOUT.If forced landing is to be continued:
• *9. Emergency Engine Shutdown — EXECUTE.
• *10. MAYDAY/7700 — BROADCAST.
• *11. ELP — INTERCEPT.
• *12. Gear and flaps — AS REQUIRED.
• *13. Canopy — EMERGENCY OPEN.
• *14. Battery switch — OFF.

• *1. PCL — IDLE.
• *2. Emergency fuel shutoff handle — DOWN.
• *3. Standby fuel pump — ON.
• *4. Starter — ON.
• *5. N1 and ITT — MONITOR FOR START INDICATIONS.
• *6. Starter — OFF (when ITT peaks or no indications of start).
• *7. Standby fuel pump — OFF (if start unsuccessful).
• If start is successful:
• *8. Condition lever — FULL INCR.
• *9. PCL — ADVANCE (as required).
• *10. PEL — EXECUTE.
• *11. Autoignition — ON.

• *1. Select nearest suitable runway.
• *2. Climb at 100 KIAS or accelerate to a position within dead engine glide distance of the runway.
• *3. Landing gear and flaps — UP (as appropriate).
• *4. Aircraft and engine instruments — CHECK.
• *5. ELP — INTERCEPT.

*1. PEL — EXECUTE.

• *1. Fire — CONFIRM.If fire is confirmed:
• *2. Emergency Engine Shutdown — EXECUTE.
• *3. Cockpit Environmental Control/Aft Cockpit Outside Air — OFF.
• Note
• Under varying conditions of altitude, fire, smoke, or fumes, the pilot hasthe option of using 100-percent oxygen, opening canopy, and/or closing theoxygen cylinder valve as dictated by judgment.

• If fire persists:
• *4. Bailout — EXECUTE.
• If fire extinguishes:
• *5. Engine Failure — EXECUTE.
• If no fire indications:
• *6. PEL — EXECUTE.

• *1. Battery and generator switches — OFF.
• *2. 100-percent oxygen — DON (as required).
• *3. Airspeed — REDUCE (as required).
• *4. Cockpit environmental control/aft cockpit outside air — OFF.
• If fire persists:
• *5. Engine Fire — EXECUTE.
• If fire extinguishes:
• *6. Land as soon as possible.

• *1. Utility bus switches — OFF.
• *2. All other nonessential equipment — OFF.
• *3. 100-percent oxygen — DON (as required).
• *4. Airspeed — REDUCE (as required).
• *5. Cockpit environmental control/aft cockpit outside air — OFF
• .If fire persists:
• *6. Bail out (altitude permitting).If fire extinguishes:
• *7. Land as soon as possible.

• *1. 100-percent oxygen — DON.
• *2. Airspeed — REDUCE (as required).
• *3. Cockpit environmental control/aft cockpit outside air — FRESH AIR INCREASE/ON.
• If smoke or fumes cannot be eliminated and so restricts vision that a safe landing cannot be made or excessive heatbuildup requires more ventilation:
• *4. Canopy — EMERGENCY OPEN.

• *1. Maintain control of aircraft, if not controllable, BAIL OUT.
• *2. Climb — AS REQUIRED.
• *3. Check flight characteristics above 5,000 feet AGL in the landing configuration, decreasing airspeed inincrements of 10 KIAS to an airspeed at which a safe landing can be made (no slower than 80 KIAS).

• *1. Controls — POSITIVELY NEUTRALIZE.
• *2. PCL — IDLE.
• *3. Altitude — CHECK.
• *4. AOA, airspeed, turn needle — CHECK.
• *5. Gear/flaps — UP.
• *6. Rudder — FULL OPPOSITE TURN NEEDLE.
• *7. Stick — FORWARD OF NEUTRAL (erect spin) — NEUTRAL (inverted spin).
• *8. Controls — NEUTRALIZE WHEN ROTATION STOPS.
• When aircraft regains controlled flight:
• *9. Recover from unusual attitude.

• 1. 10 knots airspeed
• 2. 500 fpm vertical speed
• 3.5 degrees pitch attitude
• 4. Unusual power requirements

*1. Wave off -- EXECUTE (maintain current configuration and wings level until clear of windshear).

• *1. PEL — EXECUTE (utilize a maximum of 850 ft-lb torque and avoid unnecessary PCL movements).
• If engine failure/mechanical malfunction occurs:
• *2. Emergency engine shutdown — EXECUTE.
• *3. Engine Failure — EXECUTE.

• *1. PEL — EXECUTE.
• *2. Standby fuel pump switch — ON.

• If possibility of engine fire, flameout, or failure due to location or severity of the leak:
• *1. PEL — EXECUTE.
• If engine indications are normal:
• *2. Land as soon as practicable.

• *1. Other inverter — SELECT.If annunciator remains illuminated:
• *2. Electrical control — TAKE COMMAND.
• *3. Circuit breakers — IN. (115-Vac, 1-amp; inverter control relay; INV 1 and INV 2)

• *1. Condition lever — ATTEMPT TO ADJUST PROP RPM TO NORMAL OPERATING RANGE.
• If conditions persist:
• *2. PEL — EXECUTE.If normal indications are restored:
• *3. Land as soon as practicable using normal procedures.

• *1. Condition lever — FULL INCREASE RPM.
• If propeller remains feathered:
• *2. PCL — ADVANCE (as required).
• If the resultant power does not improve performance:
• *3. PCL — IDLE.
• *4. Engine Failure — EXECUTE.
• If propeller unfeathers:
• *5. PEL — EXECUTE.

• *1. PROP TEST circuit breaker — PULL.
• If fluctuations cease, continue flight.
• If fluctuations continue:
• *2. PEL — EXECUTE.

*1. Reset flap lever to prior position.

• *1. Notify crewmember.
• *2. Canopy — EMERGENCY OPEN.
• *3. Radio cords and oxygen hose or mask — DISCONNECT.
• *4. Harness — RELEASE.From a crouched position:
• *5. DIVE toward the trailing edge of either wing.
• When clear of the aircraft:
• *6. PULL parachute D-ring

• Additional items to complete before bailout if time and aircraft controllability permit:
• *Airspeed — SLOW TO 90 TO 120 KIAS.
• *Seat — LOWER PRIOR TO OPENING CANOPY.
• *MAYDAY/7700 — BROADCAST..
• *Emergency engine shutdown — EXECUTE.
• *Turn toward unpopulated area.

• *1. Flying speed — MAINTAIN (100 KIAS minimum).
• *2. Landing gear and flaps — UP (flaps down for immediate ditch).
• *3. Engine instruments — CHECK.
• *4. Condition lever — FTHR.
• *5. Landing direction — SELECT.
• *6. Harness — LOCKED.
• *7. Airstart — PERFORM (if situation permits).
• If airstart is not attempted or is unsuccessful, altitude permitting:
• *8. BAIL OUT — EXECUTE (AS DESIRED).
• If ditch is to be continued:*
• 9. Emergency engine shutdown — EXECUTE.
• *10. Flaps — DOWN.
• *11. Canopy — EMERGENCY OPEN.
• As soon as all motion stops:
• *12. Emergency exit procedure — EXECUTE.
• *13. LPU — INFLATE WHEN CLEAR OF AIRCRAFT.

• 1. +4.5gs up to 280 KIAS; –2.3gs up to 220 KIAS; and decreasing to –1.0g at 280 KIAS.
• 2. With flaps down, +2gs and –1.0g.
• 3. During extension of the landing gear, +1.5g to 0g.

1. Operating altitude (Navy-approved limit) — 25,000 FEET.

• 1. Maximum inverted flight time — 15 SECONDS.
• 2. Maximum zero g flight time — Transient only.
• 3. Maximum vertical flight, nose up — 15 SECONDS.
• 4. Maximum vertical flight, nose down — 3 SECONDS.
• 5. Maximum knife, edge, wings vertical — 3 SECONDS.