# SOCATA TB 20 Trinidad — Emergency Procedures

> **NOT FOR FLIGHT** — source fidelity: not_applicable | operational review: none | completeness: partial | 1 unresolved safety defect(s)

Emergency procedures for the SOCATA TB 20 Trinidad with Lycoming IO-540 fuel-injected engine, constant-speed propeller, and retractable tricycle gear. Memory items are marked. The IO-540 is fuel-injected — carburetor ice does not apply to the induction system, but intake icing is noted where relevant. The TB 20 has a manual emergency gear extension system; locate and review the override mechanism before flight. All airspeeds and numerical limits must come from the specific aircraft POH. These procedures are a general guide only — not a substitute for recurrent emergency training or a qualified type checkout.

> **safety_defect**: Contains no airspeeds, power settings, fuel quantities, or other numerical limitations — all must come from the specific aircraft POH.
> **content_gap**: Equipment variations exist across this model/variant. Verify items against the specific aircraft before use.

## Engine Failure on Takeoff — Before or At Liftoff (EMERGENCY)

- [ ] Throttle `MEMORY` — **CLOSE IMMEDIATELY**
- [ ] Brakes — apply firmly to stop within remaining runway length `MEMORY` — **APPLIED FIRMLY**
- [ ] Mixture `MEMORY` — **IDLE CUTOFF**
- [ ] Ignition switch `MEMORY` — **OFF**
- [ ] Master switch `MEMORY` — **OFF**
- [ ] Fuel selector — **OFF**
> **CAUTION:** Do not attempt a turn back to the runway at low altitude. If airborne with insufficient runway remaining, land ahead or on the best available surface within a narrow arc of the departure heading.
- [ ] Occupants — advise to brace for impact — **BRACE POSITION**

## Engine Failure in Flight (EMERGENCY)

- [ ] Airspeed — pitch for best glide without delay `MEMORY` — **BEST GLIDE SPEED PER POH**
- [ ] Landing area — identify best available field or surface within glide range `MEMORY` — **SELECTED; COMMIT TO IT**
- [ ] Fuel selector — switch to opposite tank — **OPPOSITE TANK SELECTED**
- [ ] Mixture — **RICH**
- [ ] Ignition switch — **BOTH — confirm ON**
- [ ] Electric fuel pump — **ON**
- [ ] Throttle — advance if restart is being attempted — **AS REQUIRED FOR RESTART ATTEMPT**
- [ ] If restart fails — secure engine and follow Forced Landing checklist — **PROCEED TO FORCED LANDING**

## Engine Fire in Flight (EMERGENCY)

- [ ] Mixture `MEMORY` — **IDLE CUTOFF — starve fire of fuel**
- [ ] Fuel selector `MEMORY` — **OFF**
- [ ] Throttle `MEMORY` — **FULL OPEN — clear residual fuel from induction system**
- [ ] Electric fuel pump — **OFF**
- [ ] Master switch — **OFF — remove electrical ignition source**
- [ ] Airspeed — increase if fire persists to attempt to blow out flames; do not exceed Vne — **INCREASE AS PRACTICABLE PER POH**
- [ ] If fire extinguishes — execute immediate precautionary landing; do not attempt restart — **PRECAUTIONARY LANDING; NO RESTART**
- [ ] If fire continues — execute forced landing with urgency; follow Forced Landing checklist — **FORCED LANDING — EXPEDITE**

## Engine Fire on Ground (EMERGENCY)

- [ ] Mixture `MEMORY` — **IDLE CUTOFF**
- [ ] Ignition switch `MEMORY` — **OFF**
- [ ] Fuel selector `MEMORY` — **OFF**
- [ ] Master switch — **OFF**
- [ ] Occupants — evacuate immediately via car-style doors; move upwind of the aircraft — **ALL OCCUPANTS CLEAR; UPWIND**
- [ ] Fire extinguisher — direct at base of fire through cowl openings if accessible without risk — **APPLIED IF SAFE**
- [ ] Emergency services — call 911 / ATC / airport fire — **NOTIFIED**

## Electrical Fire / Smoke in Cockpit (EMERGENCY)

- [ ] Master switch `MEMORY` — **OFF — isolate all electrical power**
- [ ] Avionics master switch `MEMORY` — **OFF**
- [ ] Vents and fresh air — open to ventilate cabin; do not fan smouldering materials — **VENTILATED**
- [ ] If smoke and fire subside — identify and isolate the faulty circuit before restoring power — **FAULTY CIRCUIT IDENTIFIED AND ISOLATED**
- [ ] Essential avionics — restore selectively and one at a time; monitor for recurrence — **RESTORED AS NEEDED FOR SAFE FLIGHT**
- [ ] Land as soon as practicable — **DIVERT TO NEAREST SUITABLE AIRPORT**

## Loss of Oil Pressure (EMERGENCY)

- [ ] Oil pressure gauge — confirm reading and crosscheck oil temperature for trend `MEMORY` — **CONFIRMED LOW; OIL TEMP NOTED**
- [ ] Power — reduce to minimum required to maintain safe flight `MEMORY` — **POWER REDUCED**
- [ ] Land as soon as possible — do not operate with low or zero oil pressure; total engine failure may follow `MEMORY` — **DIVERT IMMEDIATELY TO NEAREST AIRPORT**
- [ ] Suitable landing area — identify in case of sudden engine seizure — **LANDING AREA IN SIGHT**
- [ ] ATC — declare emergency and advise intentions — **ATC NOTIFIED; INTENTIONS STATED**
- [ ] If engine seizes — follow Engine Failure in Flight checklist — **FORCED LANDING PROCEDURES**

## Induction System Icing (Alternate Air) (EMERGENCY)

> **CAUTION:** The IO-540 is fuel-injected — carburetor ice does not occur. However, impact icing of the primary air inlet is possible in visible moisture. The TB 20 is equipped with an alternate air source; activation bypasses the primary induction inlet.
- [ ] Symptoms — rough running, loss of power, or unusual RPM/MAP fluctuation in IMC or visible moisture — **NOTED**
- [ ] Alternate air control — select ALTERNATE AIR (or ALT AIR OPEN per aircraft labelling) `MEMORY` — **ALTERNATE AIR SELECTED**
- [ ] Engine performance — monitor for recovery; expect slight power reduction on alternate air — **POWER RESTORED OR STABILISED**
- [ ] Altitude and routing — avoid continued flight in icing conditions if practical — **ALTITUDE OR ROUTE ADJUSTED**
- [ ] If power does not recover — treat as engine emergency and prepare for precautionary landing — **PRECAUTIONARY LANDING INITIATED**

## Forced Landing (Power-Off) (EMERGENCY)

- [ ] Airspeed — establish and maintain best glide `MEMORY` — **BEST GLIDE SPEED PER POH**
- [ ] Landing area — select the best available surface; commit and do not change plan at low altitude `MEMORY` — **FIELD SELECTED**
- [ ] Transponder — **7700 — squawk emergency**
- [ ] ATC — declare MAYDAY; state position, altitude, and intentions — **MAYDAY DECLARED; POSITION GIVEN**
- [ ] Fuel selector — **OFF**
- [ ] Mixture — **IDLE CUTOFF**
- [ ] Ignition switch — **OFF**
- [ ] Master switch — leave on until final approach to retain flap and gear operation, then OFF — **OFF BEFORE TOUCHDOWN**
- [ ] Flaps — extend on final approach per POH to reduce touchdown speed — **EXTENDED AS REQUIRED**
- [ ] Landing gear — extend if landing on a prepared surface; leave retracted for off-field terrain landing per judgement — **DOWN FOR PAVED/FIRM SURFACE; CONSIDER RETRACTED FOR ROUGH TERRAIN**
- [ ] Seat belts and shoulder harnesses — all occupants confirm tight — **TIGHT**
- [ ] Doors — unlatch before touchdown to prevent jamming — **UNLATCHED**

## Gear Unsafe / Gear Will Not Indicate Down (EMERGENCY)

- [ ] Gear handle — confirm in DOWN position — **DOWN CONFIRMED**
- [ ] Airspeed — confirm within gear operating speed range — **WITHIN Vlo PER POH**
- [ ] Circuit breakers — check gear-related breakers for tripped condition — **BREAKERS CHECKED; RESET IF TRIPPED ONCE**
- [ ] Gear handle — recycle: raise then lower again — **RECYCLED; INDICATORS CHECKED**
- [ ] If still unsafe — fly-by or request tower visual inspection if available — **VISUAL CONFIRMATION SOUGHT**
- [ ] If gear will not extend normally — proceed to Emergency Gear Extension checklist — **EMERGENCY EXTENSION INITIATED**

## Emergency Gear Extension (EMERGENCY)

> **CAUTION:** Locate and review the manual gear extension mechanism in the specific aircraft before flight. Mechanism location and procedure vary by aircraft serial and modification status — always verify against the aircraft POH.
- [ ] Airspeed — reduce to below maximum gear extension speed and maintain `MEMORY` — **AT OR BELOW Vlo PER POH**
- [ ] Landing gear handle — **DOWN**
- [ ] Gear circuit breaker — check and reset if tripped — **CHECKED; RESET IF APPROPRIATE**
- [ ] Emergency gear extension — engage manual override per aircraft POH procedure — **OVERRIDE ENGAGED PER POH**
- [ ] Gear position indicators — verify three green after manual extension — **THREE GREEN CONFIRMED — OR NOTE ANY UNSAFE INDICATION**
- [ ] If any gear does not show green — do not retract; plan for minimum runway landing; notify ATC — **ATC ADVISED; EMERGENCY DECLARED IF NOT ALREADY**
- [ ] After landing — do not taxi; shutdown on runway and await maintenance inspection before any further movement — **AIRCRAFT STOPPED ON RUNWAY; MAINTENANCE NOTIFIED**

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NOT FOR FLIGHT — source fidelity: not_applicable | operational review: none | completeness: partial | 1 unresolved safety defect(s)  
Source: authored — no source document  
Rights: original_expression CC-BY-4.0  
Checklist hash: 4f9d211dcf4a49266dc6769fe07feb7779571460c55b7e7df726236b6a566e37  
Verify against the aircraft's own approved documentation before use.