Definition
A loss or material degradation of an engine's ability to produce commanded propulsion, including shutdown, flameout, damage, or restricted fuel flow.
Why it matters
Effects range from increased workload to cascading systems damage and reduced climb or landing performance.
Questions that turn reading into a defensible review
A strong review separates the event description, possible precursors, recorded evidence, approved criteria, and the final safety decision.
What exactly is being examined?
A loss or material degradation of an engine's ability to produce commanded propulsion, including shutdown, flameout, damage, or restricted fuel flow.
Which conditions could build the exposure?
Mechanical failure or manufacturing defect; Fuel, icing, bird, fire, or control-system effects.
What evidence would strengthen the picture?
Engine-specific thrust and health parameters Asymmetry, warnings, commands, and flight-path response
What must remain authoritative?
Current approved aircraft data, operator procedures, investigation findings, and the source document’s own scope control any operational conclusion.
Timeline, aircraft state, relationships, and recurrence
Calibrated airspeed, Pitch attitude, Roll angle, Engine thrust can contribute to a synchronized event picture when their mappings, units, sampling, and flight-phase logic are validated.
Cause, intent, compliance, and technical disposition
An FDM alert or pattern is not by itself a causal finding, judgement of individual performance, regulatory conclusion, or aircraft maintenance and airworthiness determination.
Reports, approved criteria, context, and authoritative evidence
Combine the recorded picture with applicable procedures, crew and operational reports, weather or airport information, technical evidence, and the linked official publications and investigation sources.
Thrust-loss evidence chain
Commands, engine response, aircraft motion, warnings, and physical evidence reveal different parts of the event.
Common causes and precursors
- →
Mechanical failure or manufacturing defect
- →
Fuel, icing, bird, fire, or control-system effects
- →
Incorrect indications or thrust command
Operational risks
- R1
Loss of performance or control
- R2
Fire and system damage
- R3
Diversion or emergency landing
Guidance themes
These are cross-source themes for orientation. Apply only the current, approved material for the aircraft and operation.
- Fly the aircraft and apply the approved checklist
- Confirm the affected engine and aircraft response
- Preserve data and maintenance evidence
Safety actions to consider
Combine operational and reliability data
Trace manufacturing and maintenance barriers
Train cascading-failure workload
Parameters that help explain the event
A useful event picture comes from signal relationships—not a single exceedance or a generic threshold.
Calibrated airspeed
Speed relative to the applicable target and configuration is central to energy management, approach stability, runway performance, and stall margin.
Open parameter guide ↗degPitch attitude
Pitch shows rotation, flare, stall response, and potential tail-clearance context when combined with gear geometry and radio altitude.
Open parameter guide ↗degRoll angle
Near the runway, roll angle affects wingtip or engine clearance, crosswind alignment, touchdown sequence, and lateral control margins.
Open parameter guide ↗% / ratio / aircraft-specificEngine thrust
Thrust is a primary part of energy control and is essential for understanding approach corrections, takeoff, go-around, and engine malfunctions.
Open parameter guide ↗Recommended monitoring questions
Engine-specific thrust and health parameters
Asymmetry, warnings, commands, and flight-path response
Cases that add context
ASIP provides a concise learning index. The investigation authority report remains the definitive source.
Editor-reviewed starting points
These records include a deeper ASIP editorial review. Continue to the full evidence index below for direct matches and broader manufacturer, regulator, and investigation reading.
Safety Management Manual (Doc 9859), Fourth Edition
ICAO's fourth-edition manual explains how safety data, risk management, assurance, culture, and governance work together in State and service-provider safety management.
Official sourceAC 120-82 — Flight Operational Quality Assurance
Active FAA guidance describes one acceptable way to establish a voluntary FOQA programme using de-identified aggregate flight data to identify and reduce operational risk.
Official sourceTitle or indexed metadata explicitly matches this topic.
Related collection material for adjacent systems, phases, and defenses.
Manufacturer, regulator, investigation, and safety-organization sources.
Where the reading comes from
48 source records
Official links · no copied report files48 source records match the current evidence filters.
SAFO 10021 — Adverse Levels of Porous Coke for All Engine and Oil Combinations
Official U.S. Federal Aviation Administration material indexed for powerplant. Open the publisher source for the complete document, scope, and current status.
Open official sourceEngine Relight After an All-engine Flameout
Official Airbus Safety First material indexed for powerplant. Open the publisher source for the complete document, scope, and current status.
Open official sourceEngine Thrust Management – Thrust Setting at Takeoff
Official Airbus Safety First material indexed for takeoff and powerplant. Open the publisher source for the complete document, scope, and current status.
Open official sourceLow Speed Rejected Take-Off upon Engine Failure
Official Airbus Safety First material indexed for takeoff and powerplant. Open the publisher source for the complete document, scope, and current status.
Open official sourceNTSB Safety Alert SA-029 — Engine Power Loss Due to Carburetor Icing
Official U.S. National Transportation Safety Board material indexed for powerplant and weather. Open the publisher source for the complete document, scope, and current status.
Open official sourcePreventing Loss of Engine Generators on A320 Family, A330 and A340 Aircraft
Official Airbus Safety First material indexed for powerplant. Open the publisher source for the complete document, scope, and current status.
Open official sourcePrevention of EGT Overlimit Events
Official Airbus Safety First material indexed for powerplant. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 25003 — Addressing Risk Associated with Passenger Non-Compliance and Retention of Carry-On Baggage and Personal Items During Emergency Evacuations
Official U.S. Federal Aviation Administration material indexed for cabin and cargo and emergency preparedness. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 23004 — Boeing Multi Operator Message (MOM); MOM-MOM-23-0179-01B and Erroneous Maximum Takeoff Weight (MTOW) Calculation from Boeing Performance Engineer's Tool (PET) Reporters
Official U.S. Federal Aviation Administration material indexed for takeoff and maintenance. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 20011 — SAFO 20011, Operations in Oceanic Airspace during the COVID-19 Public Health Emergency
Official U.S. Federal Aviation Administration material indexed for emergency preparedness. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 18009 — SAFO 18009, Risk of Runway Number Transposition Leading to a possible "Runway Overrun" During Takeoff at San Francisco International Airport ( SFO )
Official U.S. Federal Aviation Administration material indexed for approach and landing and takeoff. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 18014 — SAFO 18014, Identification and Manipulation of Circuit Breakers During Abnormal or Emergency Situations
Official U.S. Federal Aviation Administration material indexed for emergency preparedness. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 16008 — SAFO 16008, Reducing the Risk of Runway Excursions During Takeoff
Official U.S. Federal Aviation Administration material indexed for approach and landing and takeoff. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 12002 — Painted-over Ball-lock Release Pins on Over-wing Escape Slide Doors
Official U.S. Federal Aviation Administration material indexed for cabin and cargo and emergency preparedness. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 11003 — Embraer ERJ-190 Series Thrust Reverser Cowling Safety
Official U.S. Federal Aviation Administration material indexed for powerplant. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 11005 — Laundering of Scrapped Jet Engine Parts
Official U.S. Federal Aviation Administration material indexed for powerplant. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 10001 — Possible effects of Thickened Anti-icing Fluids on Takeoff Rotation for Airplanes withUnpowered Elevator Controls
Official U.S. Federal Aviation Administration material indexed for takeoff and weather. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 09002 — In-flight slippage of pilot and co-pilot seats on Cessna models 303, 336 and 337; and all legacy (pre-1986) single-engine Cessna models 150, 152, 170, 172, 175, 177, 180, 182, 185, 188, 190, 195, 205, 206, 207 and 210
Official U.S. Federal Aviation Administration material indexed for powerplant. Open the publisher source for the complete document, scope, and current status.
Open official sourceLessons learned
1A thrust-lever position is not produced thrust
2Root cause may sit far upstream of the flight-deck symptom