Transport-Category Performance & Weight and Balance
Transport-Category Performance & Weight and Balance is a core knowledge area on the Airline Transport Pilot FAA written exam. This hub collects our 15 in-depth, ACS-aligned transport-category performance & weight and balance articles — each written in plain English and grounded in the official FAA handbooks. Work through them below, then drill the topic with practice questions.
VR, V2, and Takeoff Safety Speed Margins Under FAR Part 25
VR, V2, and takeoff safety speed margins are certification speeds defined in 14 CFR Part 25 that ensure transport-category aircraft can safely lift off and climb even after an engine failure at the critical moment.
Takeoff Field Length Limits: Runway, Tire Speed, and Brake Energy
Transport-category aircraft must meet three distinct takeoff field length limits—available runway, tire speed ratings, and brake energy capacity—each of which can independently restrict maximum allowable takeoff weight.
Climb-Limited and Obstacle-Limited Takeoff Weight Determination
Transport-category operators must calculate both a climb-limited and an obstacle-limited takeoff weight before every departure, then use the most restrictive result to ensure legal and safe compliance under 14 CFR 121.189.
Second Segment Climb Gradient and Its Effect on Takeoff Weight
The second segment climb gradient requires transport-category aircraft to climb at a minimum gradient after gear retraction with one engine inoperative; this requirement often limits maximum allowable takeoff weight more than runway length alone.
Wet and Contaminated Runway Performance and Stopping Margins
Wet and contaminated runways significantly reduce braking effectiveness and stopping distance for transport-category aircraft; AC 91-79B provides the framework for understanding these performance penalties and required stopping margins.
Maximum Landing Weight, Overweight Landings, and Structural Limits
Maximum landing weight (MLW) is a structural limit protecting the airframe and landing gear from damage during touchdown; exceeding it requires a formal overweight landing inspection before the aircraft returns to service.
TALPA Runway Condition Assessment Matrix and Braking Action Reports
The TALPA RCR/RCAM system standardizes how runway surface conditions translate into aircraft braking performance, replacing the old 'good/fair/poor' scale with six numerical Runway Condition Codes (RwyCC 0–5) linked directly to aircraft performance data.
Crosswind and Quartering Tailwind Component Limits for Jet Transports
Jet transport operations impose strict crosswind and quartering tailwind component limits that directly affect runway selection, dispatch decisions, and safe takeoff/landing performance — understanding these limits is essential for ATP-level airmanship.
Load Manifest, Index Units, and Weight and Balance Computation
ATP candidates must understand how to complete a load manifest, convert weights to index units, and verify that a transport-category aircraft remains within both weight and CG limits throughout every phase of flight.
Last-Minute Weight Changes and Performance Recalculation Before Takeoff
When weight changes occur just before departure, transport-category crews must recalculate takeoff performance to confirm all regulatory field-length, climb-gradient, and structural limits remain valid before the aircraft moves.
Derate vs. Assumed Temperature Thrust Reduction Tradeoffs
Derate and assumed-temperature thrust reduction are two distinct methods for reducing takeoff thrust on transport-category aircraft; understanding their tradeoffs is essential for ATP performance planning and examiner scrutiny.
Maximum Operating Altitude, Service Ceiling, and Buffet Margin
Maximum operating altitude, service ceiling, and buffet margin define the upper boundaries of safe transport-category flight, each driven by distinct aerodynamic and regulatory limits that every ATP candidate must understand precisely.
Maximum Range Glide and Driftdown Speed for Jet Transports
For jet transports, maximum-range glide speed (typically L/D max) and driftdown speed are critical engine-out procedures that determine how far an aircraft can travel and how safely it can descend to a single-engine service ceiling after a power loss.
Center of Gravity Limits and Stabilizer Trim Setting for Takeoff
Center of gravity position at takeoff directly determines aircraft stability, control authority, and stabilizer trim requirements; operating outside published CG limits or using incorrect trim endangers the flight from the moment the throttles advance.
Landing Field Length Requirements and the 60/40 Dispatch Rule
Under 14 CFR 121.195, turbine-powered transport-category airplanes must meet strict landing field length requirements at dispatch, including the 60/40 rule that limits actual landing weight based on available runway length.
More Airline Transport Pilot subjects
Articles are original summaries grounded in the public-domain FAA handbooks and cite their source. ACS-aligned study aids — not a substitute for the official handbooks or regulations.