What the profile screens for
Gear remains extended beyond the operator-defined state, height, or time context after a positive climb is established.
Why it matters
Delayed retraction increases drag and may affect climb performance, obstacle margin, noise, and fuel use.
Build the event around relationships—not one number.
Define the operating context
Identify the initial climb / climb state, aircraft configuration, location, and any required external data before applying logic.
Screen the signal relationship
Use validated combinations of gear handle, gear position, radio altitude; avoid treating one isolated value as the whole event.
Confirm it is a genuine event
Check polarity, units, source, recording rate, dropouts, air/ground logic, persistence, and false-positive mechanisms.
Connect data to the safety question
Review procedures, reports, weather, airport and traffic context, exposure, recurrence, and the strength of the related barriers.
Recorded signals that may help explain the event.
Radio altitude
Height derived from radio altimetry, normally representing the distance from the aircraft to terrain directly below within the system's operating range.
Open parameter guide ↗ft/min or m/sVertical speed
The aircraft's vertical rate. Different recorded sources and smoothing can produce materially different values, especially during flare and touchdown.
Open parameter guide ↗ktCalibrated airspeed
Indicated airspeed corrected for instrument and position error, as provided by the aircraft data system.
Open parameter guide ↗discreteLanding gear status
Command, position, lock, and ground-sensing states associated with the landing gear; these are separate signals with different meanings.
Open parameter guide ↗Questions before conclusions
- Q1
Are gear handle, gear position, radio altitude valid, correctly decoded, time-aligned, and sampled well enough for this event?
- Q2
What changed immediately before, during, and after the landing-gear retraction delay indication?
- Q3
How do aircraft configuration, weather, airport geometry, automation state, and crew reports change the interpretation?
- Q4
Which current flight manual, SOP, maintenance, or operator event definition controls the final conclusion?
Safety topics that broaden the event review.
Flight-Deck Automation
Use mode awareness, active monitoring, and aircraft-response verification to keep automation aligned with crew intent.
Open topic brief ↗Aircraft SystemsEngine Failure and Thrust Loss
Separate commanded thrust, actual engine response, system effects, and crew management across partial, asymmetric, and complete thrust-loss events.
Open topic brief ↗Flight OperationsControlled Flight Into Terrain
Understand how a controllable aircraft can be flown into terrain or an obstacle through path, altitude, navigation, monitoring, or situational-awareness breakdowns.
Open topic brief ↗12 useful starting points
Terminology and topic relationships select these links; the publisher source remains authoritative.
SAFO 23001 — Potential Damage to Nose Landing Gear (NLG) by Improper Towing Procedures of the Mitsubishi Heavy Industries Regional Jet (MHIRJ) (formerly Bombardier) CL-600-2B19, CL-600-2C10 and CL-600-2D24 Airplanes
Official U.S. Federal Aviation Administration material indexed for approach and landing and ground operations. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 10007 — Tundra Tire Installation/Approval for Airplanes Equipped with Leaf Spring Type Main Landing Gear
Official U.S. Federal Aviation Administration material indexed for approach and landing and airworthiness and systems. Open the publisher source for the complete document, scope, and current status.
Open official sourceA320 landing gear downlock
Official Airbus Safety First material indexed for approach and landing and airworthiness and systems. Open the publisher source for the complete document, scope, and current status.
Open official sourceProper Landing Gear Servicing for Safe Operations
Official Airbus Safety First material indexed for approach and landing and maintenance. Open the publisher source for the complete document, scope, and current status.
Open official sourceStatistical Summary of Commercial Jet Airplane Accidents, 1959–2024
Boeing's 56th annual statistical summary organizes commercial-jet accident data using stated definitions and the CAST/ICAO occurrence taxonomy.
Open official sourceIATA Annual Safety Report — 2024
IATA's 61st annual report provides an interactive, method-defined view of commercial aviation accident performance and contributing-factor classifications.
Open official sourceSAFO 14002 — SAFO 14002, Global Positioning System ( GPS )/Global Navigation Satellite System ( GNSS ) Navigator/Autopilot Compatibility
Official U.S. Federal Aviation Administration material indexed for flight controls and automation and navigation and surveillance. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 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 sourceSAFO 08005 — Preflight of helicopter hydraulic systems to include validation of control movement smoothness and identification of adverse flight control “stick-jump.”
Official U.S. Federal Aviation Administration material indexed for flight controls and automation and airworthiness and systems. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 08015 — Preflight check of helicopter hydraulic systems to include validation of control movement smoothness and identification of adverse flight control “stick-jump”
Official U.S. Federal Aviation Administration material indexed for flight controls and automation and airworthiness and systems. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 06017 — Equipment Training and Checking for Helicopter Operators on the SPZ-7000 or SPZ-7600 Dual Digital Automatic Flight Control Systems
Official U.S. Federal Aviation Administration material indexed for flight controls and automation and human factors. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 05002 — Multiple full deflection, alternating flight control inputs
Official U.S. Federal Aviation Administration material indexed for flight controls and automation. Open the publisher source for the complete document, scope, and current status.
Open official source