ADM Aviation: Aeronautical Decision Making for Part 135 & 91

ADM Aviation: How Part 135 and Part 91 Pilots Use Aeronautical Decision Making to Reduce Risk

When was the last time you made a decision not to fly? The FAA and NTSB consistently find that human factors and judgment errors remain among the most persistent contributors to general aviation accidents — not mechanical failure, not weather alone, but the decisions pilots make under pressure. That finding should shape how every pilot thinks about preparation, risk, and proficiency. ADM aviation — aeronautical decision making applied to real-world flight operations — is the structured framework that turns those lessons into repeatable, defensible action.

For both Part 135 and Part 91 pilots, ADM is the bridge between hazard identification and risk management action. It is not instinct. It is not something you either have or don’t. Aeronautical decision making is a trainable, repeatable cognitive skill, and it applies differently depending on the operating environment. Part 135 introduces commercial pressure, fatigue management challenges, and operational control dynamics. Part 91 relies more heavily on individual pilot judgment, personal minimums, and self-imposed guardrails. In both cases, ADM turns situational awareness into a defensible process that reduces risk before an accident chain begins.

What Is ADM in Aviation?

The FAA defines aeronautical decision making as “a systematic approach to the mental process used by pilots to consistently determine the best course of action in response to a given set of circumstances” (AC 60-22). That definition matters because it frames ADM as a structured method — not common sense, not gut feeling, and not something pilots are simply born with. ADM aviation is a deliberate cognitive process designed to function under stress, uncertainty, and time pressure.

Two core frameworks anchor FAA ADM principles in practice. The first is the PAVE checklist, which structures preflight and in-flight risk assessment around four domains:

P — Pilot (fitness, currency, proficiency, fatigue, emotional state)
A — Aircraft (airworthiness, performance limitations, equipment status)
V — enVironment (weather, terrain, airspace, airport conditions)
E — External pressures (schedule, passengers, commercial demands, self-imposed expectations)

The second is the DECIDE model, a six-step decision loop that walks pilots through detecting a change, estimating its significance, choosing a course of action, identifying solutions, executing the decision, and evaluating the outcome. Together, these frameworks form the backbone of FAA aeronautical decision making training as documented in AC 60-22, the Pilot’s Handbook of Aeronautical Knowledge, and the Risk Management Handbook (FAA-H-8083-2). The FAA is explicit: ADM is a skill that must be taught and practiced, not an innate trait that some pilots possess and others lack.

Why ADM Aviation Matters for Part 91 and Part 135 Operations

Part 91: When the Pilot Is the Last Line of Defense

Under Part 91, the pilot in command is often the only safety barrier between a hazard and an accident. There is no company dispatch function, no formal SMS program, and frequently no institutional risk review process. The regulatory anchors are clear — 14 CFR §91.3 establishes pilot in command authority and responsibility, and 14 CFR §91.103 requires appropriate preflight action — but the quality of ADM aviation risk management under Part 91 depends almost entirely on the individual pilot.

That autonomy creates specific threats. Press-on-itis thrives when there is no one to push back against a marginal go decision. Owner and passenger pressure can subtly erode risk tolerance. Normalization of deviance sets in when a pilot “gets away with” flying in conditions that exceed personal minimums. Without structured preflight risk assessment, experience alone becomes an unreliable safety net — and sometimes a source of overconfidence. For Part 91 pilots, personal minimums and structured risk review are essential self-imposed guardrails. Programs like CTS IS-BAO/Part 91 Training help owner-operators and corporate flight departments build exactly this kind of operational discipline.

Part 135: Structured Operations Still Demand Strong ADM

Part 135 operators benefit from a more formal operational control structure: required training programs, checking events, flight time limitations and rest requirements (14 CFR §§135.263–135.267), and dispatch coordination. These systems reduce certain categories of risk. But they do not eliminate the need for aeronautical decision making for Part 135 pilots.

Commercial pressure — the subtle or overt expectation to complete a flight for a paying customer — remains one of the most significant ADM threats in charter and on-demand operations. Fatigue from irregular schedules degrades vigilance and judgment. Weather decisions still require the crew to evaluate whether conditions truly support the flight, regardless of what a risk form score indicates. A completed flight risk assessment tool does not automatically make a flight safe; the reasoning behind the risk score matters. Recurrent training built around realistic Part 135 scenarios, like the programs offered through CTS Part 135 Training, helps crews maintain sharp ADM skills within this operational context.

The NTSB has found across multiple reports that many accidents involve pilots who continued into deteriorating conditions or failed to execute a go-around. This pattern spans both Part 91 and Part 135 operations and underscores a consistent reality: procedures support good decisions, but they do not replace the trained judgment that ADM provides.

Core ADM Frameworks Every Pilot Should Use

The PAVE Checklist

The PAVE checklist is a preflight and in-flight risk assessment tool designed to force a structured evaluation of every flight’s risk profile. Each element anchors a category of hazard that pilots must assess honestly:

Pilot: Am I fatigued after a long duty day, or am I current but not truly proficient in this aircraft type?
Aircraft: Does this aircraft have the performance, equipment, and deice capability required for tonight’s flight into forecast icing?
enVironment: Are the ceilings, visibility, terrain, and runway conditions within margins I can safely manage — or am I hoping they improve?
External pressures: Is the charter client pushing for an on-time departure into marginal weather, or am I pressuring myself to avoid inconveniencing passengers?

PAVE checklist aviation risk management works because it creates a pause — a deliberate interruption in the momentum toward departure. That pause is where good ADM decisions live.

The DECIDE Model

The DECIDE model provides a six-step repeatable loop that works in real time, not just during preflight:

Detect — Recognize that a change or hazard exists.
Estimate — Assess the significance of the change and its impact on flight safety.
Choose — Determine the desired outcome and safe course of action.
Identify — Identify specific actions that will achieve the desired outcome.
Do — Execute the chosen action.
Evaluate — Monitor the result and determine whether the action resolved the situation or requires further adjustment.

The DECIDE model is not a one-time checklist. It is a continuous loop — detect, decide, act, evaluate, repeat. Strong ADM aviation practice means running this loop throughout every phase of flight.

Recognizing Hazardous Attitudes

The FAA identifies five hazardous attitudes that erode decision quality. Each has a specific antidote designed to interrupt the pattern:

Anti-authority (“Don’t tell me what to do.”) → Antidote: Follow the rules — they are usually right.
Impulsivity (“Do something quickly!”) → Antidote: Not so fast — think first.
Invulnerability (“It won’t happen to me.”) → Antidote: It could happen to me.
Macho (“I can do it.”) → Antidote: Taking chances is foolish.
Resignation (“What’s the use?”) → Antidote: I’m not helpless — I can make a difference.

Recognizing these patterns in yourself — before they drive a decision — is the first and most critical step to countering them. These are not academic labels. They describe real cognitive traps that show up in accident reports and are a core focus of aeronautical decision making training.

ADM in Action: Real-World Decision Points

ADM aviation is most powerful when it shapes decisions during planning, briefing, and go/no-go evaluation — long before an emergency develops. Here is how pilots use ADM to manage risk at common decision points.

Scenario 1: Part 91 VFR cross-country — weather and terrain. A Part 91 pilot planning a VFR flight into mountainous terrain checks the forecast and finds marginal VFR conditions with scattered IFR along the route. The PAVE assessment is clear: the enVironment exceeds personal minimums, and the pilot’s mountain flying experience is limited. The decision is no-go. This is not timidity — it is a trained, conservative decision anchored to structured risk assessment.

Scenario 2: Part 135 charter — thunderstorms and fatigue. A Part 135 crew has been on duty for ten hours when dispatch requests they accept a repositioning flight through an area of building thunderstorms. PAVE identifies two red flags: fatigue degrades judgment and decision quality, and the enVironment presents convective risk. The crew coordinates with dispatch to delay departure until the weather passes and they have adequate rest. The flight risk assessment tool score matters less than the reasoning behind it.

Scenario 3: Go-around on an unstable approach. On short final, airspeed is high, the aircraft is not configured, and the runway environment is partially obscured. The pilot executes a go-around. This is not a failure — a go-around is a positive ADM decision and one of the strongest safety actions a pilot can take. Unstable approaches are a significant precursor to approach-and-landing accidents, a pattern the NTSB has highlighted across multiple safety studies. The DECIDE loop worked: detect the instability, estimate the risk, choose to go around, execute, evaluate.

Scenario 4: Enroute divert — changing conditions. Forty minutes into a flight, the destination weather drops below forecast minimums and the alternate is now reporting crosswinds beyond the aircraft’s demonstrated capability. Fuel is adequate but tightening. The pilot uses DECIDE to detect the change, estimate the impact, and choose to divert to a suitable airport with better conditions and fuel availability. Situational awareness depends on continuously updating risk assessments — not committing to a plan made on the ground an hour ago.

The best ADM aviation practice happens before emergencies develop. Strong preflight risk assessment eliminates most of these scenarios entirely.

How Safety Culture Supports Better ADM

Individual ADM does not operate in a vacuum. Organizational safety culture directly influences whether pilots feel safe making conservative decisions. The concept of a “just culture” — where pilots know that canceling, diverting, or going around will not result in punishment or career consequences — is foundational to good decision-making outcomes. This is especially critical in Part 135 operations, where commercial pressure can subtly bias a crew toward completing a flight that should be delayed or canceled.

For Part 91, the pressure is different but no less real. Owner or passenger expectations can erode ADM quality without any formal organizational structure to counterbalance them. Normalization of deviance develops quietly: each small concession — flying in slightly worse weather, accepting slightly less fuel margin — resets the baseline until the margin is gone.

The industry trend toward Safety Management System (SMS) adoption — aligned with ICAO Annex 19 and the ICAO Safety Management Manual (Doc 9859) — reflects growing recognition that ADM is both an individual skill and a system-level responsibility. Digital flight risk assessment tools are becoming more common across both Part 91 and Part 135 operations. These tools support consistency, but they must be backed by aviation risk management training that explains why a risk score matters — not just how to complete the form.

Training ADM as a Repeatable Skill

The FAA frames ADM as a skill that must be taught and practiced. EASA reinforces this through its emphasis on competency-based training and threat and error management. Both authorities agree: memorizing definitions for a knowledge test does not build decision-making competency. Scenario-based ADM training does.

Effective pilot decision making training ties the skill to every phase of flight:

Preflight planning and go/no-go decisions using PAVE
Enroute monitoring and continuous risk reassessment
Stabilized approach gates and go-around triggers
Diversion decisions when conditions change
Postflight debrief to reinforce lessons learned

For Part 135, recurrent training is the ideal venue for case studies drawn from real accidents, role-play scenarios involving dispatch coordination, commercial pressure simulations, and fatigue awareness exercises. For Part 91, pilot decision making training should help pilots build self-imposed guardrails — personal minimums, structured preflight risk review, and honest self-assessment of proficiency versus currency.

Structured, scenario-based ADM training — like the kind available through CTS’s CRM & ADM Training course — turns knowledge into repeatable decision-making skill for both Part 91 and Part 135 pilots.

Conclusion: ADM Aviation Is the Process That Turns Good Judgment Into Consistent Safety

Aeronautical decision making is the structured process that transforms situational awareness and experience into repeatable, defensible decisions. Part 91 and Part 135 pilots face different risk profiles — different pressures, different institutional structures, different regulatory frameworks — but the same fundamental need for trained decision-making skill.

The best ADM aviation practice happens before an emergency develops. It happens during planning. During briefing. During the go/no-go decision that no one else sees. It happens when a pilot chooses to cancel, delay, divert, or go around — and recognizes that decision as a success, not a failure.

ADM aviation is not a topic you study once and move past. It is a skill you practice, refine, and reinforce throughout your career. Invest in ongoing, scenario-based aviation risk management training that builds this competency in context. Explore CTS’s CRM & ADM Training to make aeronautical decision making a repeatable part of how you fly.

Frequently Asked Questions About ADM in Aviation

What Is Aeronautical Decision Making in Aviation?

Aeronautical decision making (ADM) is a systematic approach to the mental process pilots use to consistently determine the best course of action in response to a given set of circumstances. As defined in FAA AC 60-22, ADM integrates hazard identification, risk assessment, and structured decision frameworks like PAVE and DECIDE to reduce risk at every phase of flight.

How Does ADM Differ for Part 135 and Part 91 Pilots?

Part 135 pilots operate within formal operational control structures that include training, checking, dispatch, and flight time and rest requirements — but still face commercial pressure, fatigue, and weather judgment challenges. Part 91 pilots often lack institutional guardrails, making individual judgment, personal minimums, and self-imposed risk management the primary safety barriers.

What Is the PAVE Checklist and How Does It Support ADM?

The PAVE checklist is a preflight and in-flight risk assessment tool from the FAA that evaluates four domains: Pilot, Aircraft, enVironment, and External pressures. It supports ADM by providing a structured framework for identifying hazards and assessing risk before and during flight, ensuring no major risk category is overlooked.

How Does the FAA Define Aeronautical Decision Making?

According to FAA Advisory Circular 60-22, ADM is “a systematic approach to the mental process used by pilots to consistently determine the best course of action in response to a given set of circumstances.” The FAA frames ADM as a teachable, practicable skill — not an innate ability — and emphasizes its integration with hazard identification and risk management.

Why Is ADM Important for Reducing Aviation Accidents?

The FAA and NTSB consistently identify human factors and judgment errors as among the most persistent contributors to general aviation accidents. ADM training directly addresses these causes by giving pilots structured tools — PAVE, DECIDE, hazardous attitude recognition — to make safer decisions under pressure, reducing the likelihood of accident chains before they develop.