Preflight Assessment

At this certificate it stops being a private checklist and becomes a regulatory act under part 117:

• You must report for any flight duty period rested and prepared to perform your assigned duties (117.5(a))
• The carrier may not assign — and you may not accept — a flight duty period if you've reported too fatigued to safely perform (117.5(b))
• Once you report yourself too fatigued, the carrier may not let you continue the FDP (117.5(c))
• As part of the dispatch or flight release, each flightcrew member must affirmatively state he or she is fit for duty prior to commencing flight (117.5(d))

That last one is the answer the examiner is fishing for: signing the release is your self-assessment, on the record. The IMSAFE-style personal inventory you've used since private pilot is how you back the signature up.

All of the following:

• An approved Minimum Equipment List exists for that airplane
• The operations specifications authorize operations in accordance with the MEL, and the flight crew has direct access at all times prior to flight to all the information in it
• The MEL provides for operation with those items inoperative
• Records identifying the inoperative instruments and equipment — and the required MEL information — are available to the pilot
• The airplane is operated under all applicable conditions and limitations in the MEL and the ops specs (121.628(a))

One phrase worth quoting: an approved MEL "constitutes an approved change to the type design without requiring recertification" (121.628(a)(2)). You are legally flying a slightly different airplane, which is why the conditions and limitations attach.

Three categories:

• Instruments and equipment required by the airworthiness requirements under which the airplane was type certificated and which are essential for safe operations under all operating conditions
• Items an airworthiness directive requires to be operable, unless the AD provides otherwise
• Instruments and equipment required for specific operations by part 121

The escape hatch: an airplane whose inoperative item falls under the first or third category may still be moved under a special flight permit under 21.197 and 21.199 — 121.628(c) says "notwithstanding paragraphs (b)(1) and (b)(3)," so an AD-grounded item gets no ferry relief unless the AD itself provides it. A ferry flight, not a revenue flight.

The MEL addresses inoperative instruments and equipment — failing internal systems and their parts; the CDL (Configuration Deviation List) is used the same way but addresses missing external parts of the aircraft.

AFH ch. 16's CDL examples: service doors, power receptacle doors, slat track doors, landing gear doors, APU ram air doors, flap fairings, nose-wheel spray deflectors, position light lens covers, slat segment seals, static dischargers. Both can carry performance penalties, and both must be acknowledged before you compute takeoff data — the AFH's rejected-takeoff discussion lists "penalizing MEL or CDL items" among the factors that degrade stopping performance.

The deferral is documented, placarded, and time-limited (AFH ch. 16):

• The MEL entry may impose conditional requirements — operational, mechanical, or both — such as precautionary preflight checks, partial repairs, or isolating and securing parts of the affected system
• Required procedures are flagged "O" (operations) or "M" (maintenance) — the letter tells you whose job the compliance step is
• An authorized person makes an entry in the MEL Deferral Record and issues a temporary placard, affixed onto or next to the affected instrument or control to remind the crew of the limitations
• The deferral authorizes operation for a limited time before permanent repair

Your job at the flight deck (AA.II.A.S3): confirm the placard, the O-procedures, and the operational limitations — and be able to explain how the deferral changes today's flight.

At liftoff. AFH ch. 16 is explicit: the MEL applies only while the aircraft is on the ground awaiting departure or takeoff — it is essentially a dispatching reference. Once airborne, mechanical failures are handled with the appropriate checklists and the approved AFM (abnormal/emergency sections), not the MEL. You may look at the MEL in flight for background, but actions are based strictly on the AFM. The distinction matters in the oral: an item that would ground the airplane at the gate does not require an emergency response to the same failure in cruise.

The document by which a domestic or flag flight legally exists. Under 121.593, no person may start a domestic flight unless an aircraft dispatcher specifically authorizes it (exception: an intermediate stop specified in the original release, on the ground not more than one hour). The release may be in any form but must contain at least:

• Aircraft identification number and trip number
• Departure airport, intermediate stops, destination airports, and alternate airports
• A statement of the type of operation (e.g., IFR, VFR)
• Minimum fuel supply
• For ETOPS flights, the ETOPS diversion time for which the flight is dispatched (121.687(a))

It must also contain or attach the latest available weather reports and forecasts for destination, intermediate stops, and alternates as of the time the release is signed by the pilot in command and dispatcher (121.687(b)) — the signature line where your preflight assessment and the dispatcher's meet.

• All available current reports or information on airport conditions and irregularities of navigation facilities that may affect the safety of the flight
• Before the flight: all available weather reports and forecasts of weather phenomena that may affect the safety of flight — the reg names clear air turbulence, thunderstorms, and low altitude wind shear — for each route to be flown and each airport to be used
• During the flight: any additional available information of meteorological conditions and irregularities of facilities and services that may affect safety

This is why the ATP preflight-assessment conversation is about a shared system, not a solo brief: dispatch is regulatory obligated to feed you, and joint responsibility runs through the release you both signed.

Ops specs are the fine print on the certificate. Under 119.5, no person may:

• Operate as an air carrier without, or in violation of, an appropriate certificate and appropriate operations specifications (119.5(g))
• Operate in a geographical area unless the ops specs specifically authorize it (119.5(j))
• Operate in violation of the ops specs (119.5(l))

Practically, they're also where your MEL authority lives (121.628(a)(2)). The skill element (AA.II.A.S5) expects you to identify and comply — know where in your operator's manuals the ops specs paragraphs relevant to today's flight sit (deicing program, lower-than-standard minimums, ETOPS), and check the airplane and route against them.

• Airborne navigation databases run on a 28-day revision cycle (IPH ch. 6)
• Pilots using the databases are ultimately responsible for ensuring the database they are operating with is current — including checking NOTAM-type information on database errors supplied by the avionics manufacturer or database provider (IPH ch. 6)
• Part 121, 125, and 135 operators must update databases in accordance with their approved maintenance program (IPH ch. 6) — loading the data is a maintenance function, but confirming the cycle's effective dates on the flight deck is a crew item
• Naming conventions and system capabilities vary by manufacturer, so cross-check the loaded procedure against the chart before you rely on it (IPH ch. 6)

Prohibited: taking off when frost, ice, or snow is adhering to the wings, control surfaces, propellers, engine inlets, or other critical surfaces — the clean aircraft concept.

The one exception: takeoffs with frost under the wing in the area of the fuel tanks may be authorized by the Administrator (121.629(b)).

The preflight-assessment piece (AA.II.A.S7) is ensuring surfaces are free of ice, snow, and frost and knowing the deicing procedures if conditions demand them — the holdover-time and pretakeoff-check machinery is covered under Task II.E, where the ACS puts it.

The inspection is divided and proceduralized rather than reduced:

• The walkaround and flight deck setup are split between crewmembers per the operator's checklist, and the check is coordinated — each pilot must know which items belong to whom (AA.II.A.S1)
• Nothing gets moved — doors, hatches, flight control surfaces — without coordinating with ground crew and confirming clearance (AA.II.A.S2); people and equipment live around a transport airplane in ways they don't around a trainer
• What you find goes into the system: document any discrepancies, take corrective action, and acknowledge the limitations imposed by MEL/CDL deferrals (AA.II.A.S3). At a carrier, "corrective action" means the logbook and maintenance control, not a screwdriver
• The output is still a single judgment call: the aircraft is airworthy and in condition for safe flight (AA.II.A.S4) — and the PIC owns it regardless of how many people touched the airplane first

Preventive maintenance is simple or minor preservation operations and the replacement of small standard parts, not involving complex assembly operations, limited to the items listed in part 43, appendix A(c) (PHAK ch. 9). Any pilot who performs it must make a maintenance record entry: a description of the work, the date of completion, and the pilot's name, signature, certificate number, and type of certificate (PHAK ch. 9). The ATP framing for the oral (AA.II.A.K3): know the authority exists and what it covers, and then explain that in air carrier operations the practical answer to a discrepancy is the maintenance program and maintenance control — not the crew — with the MEL/CDL as the deferral instrument.

1. Write it up. An undocumented discrepancy is not a deferral — the MEL process starts with the entry (AA.II.A.S3)
2. Consult the MEL with maintenance control: is the item deferrable, in what quantity, with what O and M procedures, and with what operational limitations (AFH ch. 16)
3. Confirm the deferral is executed — Deferral Record entry, placard on or next to the affected control (AFH ch. 16)
4. Trace the operational consequences before you accept the airplane: performance penalties, weather or equipment restrictions, and any interaction with today's route — an MEL/CDL penalty is on the AFH's list of factors that degrade rejected-takeoff stopping performance
5. Then decide whether the airplane is in condition for safe flight for this flight (AA.II.A.S4). The MEL makes the flight legal; it does not make it wise on every day the deferral is technically available

The external-pressure risk element (AA.II.A.R4) lives in this scenario: the schedule leans on the deferral decision, and the fit-for-duty signature you gave under 117.5(d) is the same signature that accepts this airplane.

All of it — dispatch shares the work, not the accountability. The dispatcher must give you airport conditions, facility irregularities, and hazardous weather for every route and airport (121.601), and the release carries the latest weather when you sign it (121.687(b)). Your side (AA.II.A.K5, S6): assess weather, airports, airspace, terrain, and obstructions against this airplane, this deferral list, and this crew. The ACS also names aviation security concerns as a risk element (AA.II.A.R5) — at a carrier that means following your operator's security procedures and treating anything anomalous around the airplane or its servicing as a stop-and-resolve item, not a keep-the-push-moving item.

The same documents you've always confirmed — airworthiness and registration certificates, operating limitations and manuals, weight and balance data (AA.II.A.K2) — plus the carrier overlay: the MEL/CDL and its deferral record, and the dispatch release as the required documentation for the operation (AA.II.A.K2e names it directly). Inspection status in a 121 operation is tracked by the operator's maintenance program, so the flight-deck check is confirmation the paperwork on board matches the airplane: deferral placards agree with the release, and nothing on the release surprises the crew. If the release says one thing and the logbook says another, that conflict is resolved before the airplane moves.